首页 > 最新文献

Journal of Vibroengineering最新文献

英文 中文
Field test of blasting vibration and adjacent slope stability under the influence of blasting vibration in mining 矿山爆破振动影响下爆破振动及邻近边坡稳定性的现场试验
IF 1 Q4 ENGINEERING, MECHANICAL Pub Date : 2023-06-25 DOI: 10.21595/jve.2022.22826
Can Liu, Feifei Wang, Qingyang Ren, Bin Chen, Hong-hua Jin, Songjun Cui, Ziqiang Zhu
Blasting mining in open-pit has a significant impact on the adjacent slope, which often causes the rock mass cracking and spalling of the slope to form a landslide disaster. In order to explore the impact of blasting vibration on the adjacent slope, field tests were carried out with professional testing equipment, and several blasting vibration data were measured. Sadovsky formula was used for fitting analysis, and the influence coefficient of blasting vibration was obtained. The slope stability analysis was carried out by using the limit equilibrium SLIDE analysis software, and the slope safety factor under the influence of blasting vibration was obtained. The results show that: The maximum blasting vibration speed monitored in this blasting is 2.1987 cm/s, and the main vibration frequency is 14.6484 Hz. Therefore, according to the standards in the regulations, the impact of this blasting on the slope meets the corresponding requirements. In this slope stability analysis, the blasting vibration influence coefficient Kc= 0.032, when 40 m away from the final slope is used. Morgen Prince method and Spencer method generally have higher safety factors than Bishop method. The safety factor of the analysis section at the 45° slope angle is 1.217. The slope can maintain stability under the influence of blasting vibration.
露天矿爆破开采对邻近边坡影响较大,往往导致边坡岩体开裂、剥落,形成滑坡灾害。为了探讨爆破振动对邻近边坡的影响,利用专业的测试设备进行了现场测试,并测量了多个爆破振动数据。采用萨多夫斯基公式进行拟合分析,得到了爆破振动的影响系数。利用极限平衡SLIDE分析软件对边坡进行了稳定性分析,得到了爆破振动影响下的边坡安全系数。结果表明:本次爆破监测到的最大爆破振动速度为2.1987cm/s,主振动频率为14.6484Hz。因此,根据规范中的标准,本次爆破对边坡的影响符合相应的要求。在本次边坡稳定性分析中,采用距离最终边坡40m时的爆破振动影响系数Kc=0.032。Morgen Prince法和Spencer法的安全系数通常高于Bishop法。分析断面在45°边坡角处的安全系数为1.217。边坡在爆破震动的影响下可以保持稳定。
{"title":"Field test of blasting vibration and adjacent slope stability under the influence of blasting vibration in mining","authors":"Can Liu, Feifei Wang, Qingyang Ren, Bin Chen, Hong-hua Jin, Songjun Cui, Ziqiang Zhu","doi":"10.21595/jve.2022.22826","DOIUrl":"https://doi.org/10.21595/jve.2022.22826","url":null,"abstract":"Blasting mining in open-pit has a significant impact on the adjacent slope, which often causes the rock mass cracking and spalling of the slope to form a landslide disaster. In order to explore the impact of blasting vibration on the adjacent slope, field tests were carried out with professional testing equipment, and several blasting vibration data were measured. Sadovsky formula was used for fitting analysis, and the influence coefficient of blasting vibration was obtained. The slope stability analysis was carried out by using the limit equilibrium SLIDE analysis software, and the slope safety factor under the influence of blasting vibration was obtained. The results show that: The maximum blasting vibration speed monitored in this blasting is 2.1987 cm/s, and the main vibration frequency is 14.6484 Hz. Therefore, according to the standards in the regulations, the impact of this blasting on the slope meets the corresponding requirements. In this slope stability analysis, the blasting vibration influence coefficient Kc= 0.032, when 40 m away from the final slope is used. Morgen Prince method and Spencer method generally have higher safety factors than Bishop method. The safety factor of the analysis section at the 45° slope angle is 1.217. The slope can maintain stability under the influence of blasting vibration.","PeriodicalId":49956,"journal":{"name":"Journal of Vibroengineering","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43636218","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Uncertainty analysis for cylindrical structure vibration according to generalized polynomial chaos method 基于广义多项式混沌法的圆柱结构振动不确定性分析
IF 1 Q4 ENGINEERING, MECHANICAL Pub Date : 2023-06-23 DOI: 10.21595/jve.2022.22254
Chen Luyun, H. Yi
Aiming to gain an accurate prediction model of the vibro-acoustic problem for the vibrating structure systems, the uncertainty vibration analysis for the cylindrical shell structure considering construction factors is investigated. The generalized polynomial chaos (GPC) method is used to gain the analytical solution of the free vibration for the cylindrical shell structure, in which the construction uncertainty factors, comprising the material uncertainty parameter and construction geometric uncertainty parameter, are considered. By combining the collocation method and generalized polynomial chaos method, the influence of the uncertainty construction factor on the free vibration properties for the cylindrical shell structure is verified by a numerical analysis. The results provide technical support for the design and construction of the vibrating structure for vibration and noise reducing.
为了获得振动结构系统振动声问题的准确预测模型,对考虑施工因素的圆柱壳结构进行了不确定振动分析。采用广义多项式混沌(GPC)方法对圆柱壳结构的自由振动进行了解析求解,其中考虑了结构不确定性因素,包括材料不确定性参数和结构几何不确定性参数。结合配置法和广义多项式混沌法,通过数值分析验证了不确定性构造因子对圆柱壳结构自由振动特性的影响。研究结果为减振降噪结构的设计和施工提供了技术支持。
{"title":"Uncertainty analysis for cylindrical structure vibration according to generalized polynomial chaos method","authors":"Chen Luyun, H. Yi","doi":"10.21595/jve.2022.22254","DOIUrl":"https://doi.org/10.21595/jve.2022.22254","url":null,"abstract":"Aiming to gain an accurate prediction model of the vibro-acoustic problem for the vibrating structure systems, the uncertainty vibration analysis for the cylindrical shell structure considering construction factors is investigated. The generalized polynomial chaos (GPC) method is used to gain the analytical solution of the free vibration for the cylindrical shell structure, in which the construction uncertainty factors, comprising the material uncertainty parameter and construction geometric uncertainty parameter, are considered. By combining the collocation method and generalized polynomial chaos method, the influence of the uncertainty construction factor on the free vibration properties for the cylindrical shell structure is verified by a numerical analysis. The results provide technical support for the design and construction of the vibrating structure for vibration and noise reducing.","PeriodicalId":49956,"journal":{"name":"Journal of Vibroengineering","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44586455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on deformation of valve slice of automobile shock absorber 汽车减振器气门片变形研究
IF 1 Q4 ENGINEERING, MECHANICAL Pub Date : 2023-06-21 DOI: 10.21595/jve.2023.23153
Shisheng Li, Qiong Yuan
Based on the bending deformation theory of cantilever beam, the mathematical model of bending deformation of single valve slice under uniform load is proposed and deduced by using the microbeam element method (MEM). The accuracy and reliability of the mathematical model established by the MEM and the small deflection method (SDM) are verified through the finite element simulation comparison. The results show that the valve slice deformation mathematical model under uniform load established by using the deformation theory of the MEM is suitable not only for the small deflection deformation (SDD) but also for the large deflection deformation (LDD) of the valve slice, and can reflect the dynamic deformation characteristics of the valve slice more truly than the SDM, which provides a certain theoretical basis for the deformation study of single valve slice. At the same time, the mathematical model is used to simulate the deformation law of the valve slice when the thickness, inner radius and outer radius change. The conclusion provides technical support for the design and performance prediction of the shock absorber.
基于悬臂梁弯曲变形理论,采用微梁单元法,提出并推导了均匀载荷作用下单阀片弯曲变形的数学模型。通过有限元仿真对比,验证了MEM法和小挠度法(SDM)建立的数学模型的准确性和可靠性。结果表明,利用MEM变形理论建立的均匀载荷下阀片变形数学模型不仅适用于阀片的小挠度变形(SDD),也适用于阀片的大挠度变形(LDD),比SDM更真实地反映了阀片的动态变形特性,为单阀片的变形研究提供了一定的理论依据。同时,利用数学模型模拟了阀片厚度、内半径和外半径变化时的变形规律。该结论为减振器的设计和性能预测提供了技术支持。
{"title":"Research on deformation of valve slice of automobile shock absorber","authors":"Shisheng Li, Qiong Yuan","doi":"10.21595/jve.2023.23153","DOIUrl":"https://doi.org/10.21595/jve.2023.23153","url":null,"abstract":"Based on the bending deformation theory of cantilever beam, the mathematical model of bending deformation of single valve slice under uniform load is proposed and deduced by using the microbeam element method (MEM). The accuracy and reliability of the mathematical model established by the MEM and the small deflection method (SDM) are verified through the finite element simulation comparison. The results show that the valve slice deformation mathematical model under uniform load established by using the deformation theory of the MEM is suitable not only for the small deflection deformation (SDD) but also for the large deflection deformation (LDD) of the valve slice, and can reflect the dynamic deformation characteristics of the valve slice more truly than the SDM, which provides a certain theoretical basis for the deformation study of single valve slice. At the same time, the mathematical model is used to simulate the deformation law of the valve slice when the thickness, inner radius and outer radius change. The conclusion provides technical support for the design and performance prediction of the shock absorber.","PeriodicalId":49956,"journal":{"name":"Journal of Vibroengineering","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46319044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sensitivity analysis of numerical model parameters for optimized PEH responses 优化PEH响应数值模型参数的灵敏度分析
IF 1 Q4 ENGINEERING, MECHANICAL Pub Date : 2023-05-29 DOI: 10.21595/jve.2022.22910
Petar Gljušćić, S. Zelenika
With the increasing popularity of wearable devices, typically employed in fitness and health monitoring, there is an evident need to extend their autonomy and replace the conventional power sources with environmentally friendly alternatives. Piezoelectric energy harvesting systems, optimized for collecting kinetic energy from random human motion and transduce it into electrical energy, represent a viable option for powering autonomous wearables. Since established analytical methods are unable to model the behaviour of piezoelectric harvesters with complex optimized geometries, suitable numerical models need to be employed for their design. This implies the need of a thorough study focused on the mechanical engineering design optimization purposes of how the finite element type and mesh density affect the uncoupled modal and coupled transient responses of a new class of optimised design configurations of the studied devices.
随着可穿戴设备(通常用于健身和健康监测)的日益普及,显然需要扩大其自主性,并用环保的替代品取代传统电源。压电能量采集系统经过优化,可从人类随机运动中收集动能并将其转换为电能,是为自主可穿戴设备供电的可行选择。由于已建立的分析方法无法对具有复杂优化几何形状的压电收割机的行为进行建模,因此需要采用合适的数值模型进行设计。这意味着需要深入研究机械工程设计优化目的,即有限元类型和网格密度如何影响所研究设备的一类新优化设计配置的非耦合模态和耦合瞬态响应。
{"title":"Sensitivity analysis of numerical model parameters for optimized PEH responses","authors":"Petar Gljušćić, S. Zelenika","doi":"10.21595/jve.2022.22910","DOIUrl":"https://doi.org/10.21595/jve.2022.22910","url":null,"abstract":"With the increasing popularity of wearable devices, typically employed in fitness and health monitoring, there is an evident need to extend their autonomy and replace the conventional power sources with environmentally friendly alternatives. Piezoelectric energy harvesting systems, optimized for collecting kinetic energy from random human motion and transduce it into electrical energy, represent a viable option for powering autonomous wearables. Since established analytical methods are unable to model the behaviour of piezoelectric harvesters with complex optimized geometries, suitable numerical models need to be employed for their design. This implies the need of a thorough study focused on the mechanical engineering design optimization purposes of how the finite element type and mesh density affect the uncoupled modal and coupled transient responses of a new class of optimised design configurations of the studied devices.","PeriodicalId":49956,"journal":{"name":"Journal of Vibroengineering","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42163536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental study on continuous firing vibration response of the typical machine guns under different ground conditions 不同地面条件下典型机枪连发振动响应的试验研究
IF 1 Q4 ENGINEERING, MECHANICAL Pub Date : 2023-05-05 DOI: 10.21595/jve.2023.22834
Heng-lin Liu, Longqin He, Cheng Xu
In order to study the influence of ground conditions on the continuous firing vibration response of typical machine gun, and find out under which conditions the machine gun is most stable. A high-speed photography method was used to measure the motion of multiple parts. The motion curve of each part in the shooting process are obtained, and the projectile dispersion are recorded. According to the results, the motion characteristics of each part is analyzed. The pitching and translational quasi-periodic motions of the whole gun under different ground conditions are compared by synthesizing the motion data of various parts. The working modes of gun tripod under different ground conditions are discussed, and are compared according to the corresponding projectile dispersion. The result show that, in quasi-periodic pitching motion, the upward pitching motion response of the gun under the condition of cement ground is large, the ability to restore the initial position is poor, and the corresponding vertical dispersion is the worst. Under the soil condition, the upward and downward pitching motion cycle of the gun is relatively stable, the ability to restore the initial position is strong, and the corresponding vertical dispersion is the best. In terms of quasi-periodic translational motion, the translational motion of the gun mount under the cement ground is the biggest, and the corresponding horizontal dispersion is also the biggest. Under the soil ground condition, the translational motion is the smallest, and the corresponding horizontal dispersion is also the smallest.
为了研究地面条件对典型机枪连续射击振动响应的影响,找出机枪在哪种条件下最稳定。使用高速摄影方法来测量多个零件的运动。获得了射击过程中各部分的运动曲线,并记录了弹丸的散布情况。根据计算结果,对各部件的运动特性进行了分析。通过综合各部件的运动数据,比较了全炮在不同地面条件下的俯仰和平移准周期运动。讨论了火炮三脚架在不同地面条件下的工作方式,并根据相应的弹丸散布情况进行了比较。结果表明,在准周期俯仰运动中,火炮在水泥地面条件下的向上俯仰运动响应较大,恢复初始位置的能力较差,相应的垂直色散最差。在土壤条件下,火炮上下俯仰运动周期相对稳定,恢复初始位置的能力较强,相应的垂直分散度最好。在准周期平移运动方面,炮架在水泥地面下的平移运动最大,相应的水平色散也最大。在土壤-地面条件下,平移运动最小,相应的水平离散度也最小。
{"title":"Experimental study on continuous firing vibration response of the typical machine guns under different ground conditions","authors":"Heng-lin Liu, Longqin He, Cheng Xu","doi":"10.21595/jve.2023.22834","DOIUrl":"https://doi.org/10.21595/jve.2023.22834","url":null,"abstract":"In order to study the influence of ground conditions on the continuous firing vibration response of typical machine gun, and find out under which conditions the machine gun is most stable. A high-speed photography method was used to measure the motion of multiple parts. The motion curve of each part in the shooting process are obtained, and the projectile dispersion are recorded. According to the results, the motion characteristics of each part is analyzed. The pitching and translational quasi-periodic motions of the whole gun under different ground conditions are compared by synthesizing the motion data of various parts. The working modes of gun tripod under different ground conditions are discussed, and are compared according to the corresponding projectile dispersion. The result show that, in quasi-periodic pitching motion, the upward pitching motion response of the gun under the condition of cement ground is large, the ability to restore the initial position is poor, and the corresponding vertical dispersion is the worst. Under the soil condition, the upward and downward pitching motion cycle of the gun is relatively stable, the ability to restore the initial position is strong, and the corresponding vertical dispersion is the best. In terms of quasi-periodic translational motion, the translational motion of the gun mount under the cement ground is the biggest, and the corresponding horizontal dispersion is also the biggest. Under the soil ground condition, the translational motion is the smallest, and the corresponding horizontal dispersion is also the smallest.","PeriodicalId":49956,"journal":{"name":"Journal of Vibroengineering","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42615368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research on fault diagnosis method of electromechanical transmission system based on one-dimensional convolutional neural network with variable learning rate 基于变学习率一维卷积神经网络的机电传动系统故障诊断方法研究
IF 1 Q4 ENGINEERING, MECHANICAL Pub Date : 2023-05-05 DOI: 10.21595/jve.2023.22973
Liwu Liu, Guoyan Chen, Feifei Yu, Canyi Du, Yongkang Gong, Huijin Yuan, Zhenni Dai
As an important part of many mechanical equipment, the mechanical transmission system is very important to carry out efficient and accurate fault monitoring and diagnosis. Compared with traditional fault diagnosis techniques, such as spectrum analysis, deep learning has been widely used in the field of mechanical system fault diagnosis due to its powerful data expression ability, and has achieved certain research results. One-dimensional convolutional neural network is a widely used model for deep learning, so in this paper, the one-dimensional convolutional neural network (1D-CNN) in the deep learning theory and the vibration signal analysis method are integrated and applied to the fault identification of mechanical transmission system to achieve accurate diagnosis and classification of faults. The experiment is mainly to collect the vibration signal data of different fault states such as broken teeth, cracking, shaft unbalance, bearing wear, and excessive friction of the driven wheel of the mechanical transmission system, it was divided into training set and testing set according to an appropriate proportion, and 1D-CNN was built using Python. The deep learning model deeply analyzed the influence of different data sample sizes and different model parameters on the recognition accuracy, and obtained an ideal diagnostic model based on variable learning rate through parameter adjustment and comparative analysis. This experimental results show that the recognition method based on one-dimensional convolutional neural network can be effectively applied to the fault diagnosis of related mechanical transmission, and has a high diagnosis accuracy.
作为许多机械设备的重要组成部分,机械传动系统对进行高效、准确的故障监测和诊断至关重要。与频谱分析等传统故障诊断技术相比,深度学习由于其强大的数据表达能力,在机械系统故障诊断领域得到了广泛应用,并取得了一定的研究成果。一维卷积神经网络是深度学习中广泛使用的模型,因此本文将深度学习理论中的一维卷积神经网(1D-CNN)与振动信号分析方法相结合,应用于机械传动系统的故障识别,实现故障的准确诊断和分类。实验主要是收集机械传动系统从动轮断齿、开裂、轴不平衡、轴承磨损、摩擦过大等不同故障状态的振动信号数据,按适当比例分为训练集和测试集,并使用Python构建1D-CNN。深度学习模型深入分析了不同数据样本量和不同模型参数对识别精度的影响,通过参数调整和比较分析,得到了一个理想的基于可变学习率的诊断模型。实验结果表明,基于一维卷积神经网络的识别方法可以有效地应用于相关机械传动的故障诊断,具有较高的诊断精度。
{"title":"Research on fault diagnosis method of electromechanical transmission system based on one-dimensional convolutional neural network with variable learning rate","authors":"Liwu Liu, Guoyan Chen, Feifei Yu, Canyi Du, Yongkang Gong, Huijin Yuan, Zhenni Dai","doi":"10.21595/jve.2023.22973","DOIUrl":"https://doi.org/10.21595/jve.2023.22973","url":null,"abstract":"As an important part of many mechanical equipment, the mechanical transmission system is very important to carry out efficient and accurate fault monitoring and diagnosis. Compared with traditional fault diagnosis techniques, such as spectrum analysis, deep learning has been widely used in the field of mechanical system fault diagnosis due to its powerful data expression ability, and has achieved certain research results. One-dimensional convolutional neural network is a widely used model for deep learning, so in this paper, the one-dimensional convolutional neural network (1D-CNN) in the deep learning theory and the vibration signal analysis method are integrated and applied to the fault identification of mechanical transmission system to achieve accurate diagnosis and classification of faults. The experiment is mainly to collect the vibration signal data of different fault states such as broken teeth, cracking, shaft unbalance, bearing wear, and excessive friction of the driven wheel of the mechanical transmission system, it was divided into training set and testing set according to an appropriate proportion, and 1D-CNN was built using Python. The deep learning model deeply analyzed the influence of different data sample sizes and different model parameters on the recognition accuracy, and obtained an ideal diagnostic model based on variable learning rate through parameter adjustment and comparative analysis. This experimental results show that the recognition method based on one-dimensional convolutional neural network can be effectively applied to the fault diagnosis of related mechanical transmission, and has a high diagnosis accuracy.","PeriodicalId":49956,"journal":{"name":"Journal of Vibroengineering","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43072387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diagnosis of rotating machinery based on improved convolutional neural networks with gray-level transformation 基于改进的灰度变换卷积神经网络的旋转机械故障诊断
IF 1 Q4 ENGINEERING, MECHANICAL Pub Date : 2023-04-13 DOI: 10.21595/jve.2023.23040
Guofang Nan, Jianwei Wang, Di Ding
A fault diagnosis method for the rotating machinery based on improved Convolutional Neural Network (CNN) with Gray-Level Transformation (GLT) is proposed to increase the accuracy of the recognition adopting the multiple sensors. The Symmetrized Dot Pattern (SDP) in this method is applied to fuse the data of the multiple sensors, and the multi-color value method is adopted to increase the feature dimension. The grayscale and GLT are used to reduce the dimension of the SDP image. The SDP grayscale image is finally input to the CNN network for training recognition. The research results show that the diagnosis accuracy of the rolling bearing system based on the novel method is up to 98.6 %. Compared with the method without the multi-color value and GLT, the recognition accuracy of the proposed method is improved by 22.3 %, and the training time is reduced by about one third. The research work reveals that the developed method has the potential application value under the multi-sensor working conditions for the fault diagnosis.
为了提高多传感器识别的准确性,提出了一种基于改进的卷积神经网络(CNN)和灰度变换(GLT)的旋转机械故障诊断方法。该方法中的对称点模式(SDP)用于融合多个传感器的数据,并采用多色值方法来增加特征维数。灰度和GLT用于减小SDP图像的尺寸。SDP灰度图像最终被输入到CNN网络用于训练识别。研究结果表明,基于该方法的滚动轴承系统诊断准确率高达98.6%。与没有多色值和GLT的方法相比,该方法的识别准确率提高了22.3%,训练时间减少了约三分之一。研究工作表明,该方法在多传感器工作条件下对故障诊断具有潜在的应用价值。
{"title":"Diagnosis of rotating machinery based on improved convolutional neural networks with gray-level transformation","authors":"Guofang Nan, Jianwei Wang, Di Ding","doi":"10.21595/jve.2023.23040","DOIUrl":"https://doi.org/10.21595/jve.2023.23040","url":null,"abstract":"A fault diagnosis method for the rotating machinery based on improved Convolutional Neural Network (CNN) with Gray-Level Transformation (GLT) is proposed to increase the accuracy of the recognition adopting the multiple sensors. The Symmetrized Dot Pattern (SDP) in this method is applied to fuse the data of the multiple sensors, and the multi-color value method is adopted to increase the feature dimension. The grayscale and GLT are used to reduce the dimension of the SDP image. The SDP grayscale image is finally input to the CNN network for training recognition. The research results show that the diagnosis accuracy of the rolling bearing system based on the novel method is up to 98.6 %. Compared with the method without the multi-color value and GLT, the recognition accuracy of the proposed method is improved by 22.3 %, and the training time is reduced by about one third. The research work reveals that the developed method has the potential application value under the multi-sensor working conditions for the fault diagnosis.","PeriodicalId":49956,"journal":{"name":"Journal of Vibroengineering","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46092904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Configuration design and load capacity analysis of pelvic fracture reduction robot 骨盆骨折复位机器人的结构设计与承载能力分析
IF 1 Q4 ENGINEERING, MECHANICAL Pub Date : 2023-04-13 DOI: 10.21595/jve.2023.22949
Shenyang Cai, Jing-Hui Lei, Jinjun Rao
Robot-assisted reduction of pelvic fracture requires large workspace and large load capacity. A kind of six degree-of-freedom (DOF) robot for pelvic fracture reduction is designed, which is a hybrid configuration composed of three-revolute-revolute-revolute (3RRR) parallel mechanism and three-dimensional guide rail. The hybrid configuration can ensure that the robot meet the needs of large workspace and large load capacity. Through the comparative analysis of dynamic and virtual prototype simulation, the reduction force of the designed reduction robot can reach 200 N. The experimental results show that the robot not only has the characteristics of high precision and high load of parallel robot, but also has the characteristics of large workspace of series robot.
机器人辅助骨盆骨折复位需要大的工作空间和大的负载能力。设计了一种用于骨盆骨折复位的六自由度(DOF)机器人,该机器人是由三回转-回转(3RRR)并联机构和三维导轨组成的混合构型。混合配置可以确保机器人满足大工作空间和大负载能力的需求。通过动态仿真与虚拟样机仿真的对比分析,设计的减速机器人的减速力可达200N。实验结果表明,该机器人不仅具有并联机器人的高精度、高负载特性,还具有串联机器人的大工作空间特性。
{"title":"Configuration design and load capacity analysis of pelvic fracture reduction robot","authors":"Shenyang Cai, Jing-Hui Lei, Jinjun Rao","doi":"10.21595/jve.2023.22949","DOIUrl":"https://doi.org/10.21595/jve.2023.22949","url":null,"abstract":"Robot-assisted reduction of pelvic fracture requires large workspace and large load capacity. A kind of six degree-of-freedom (DOF) robot for pelvic fracture reduction is designed, which is a hybrid configuration composed of three-revolute-revolute-revolute (3RRR) parallel mechanism and three-dimensional guide rail. The hybrid configuration can ensure that the robot meet the needs of large workspace and large load capacity. Through the comparative analysis of dynamic and virtual prototype simulation, the reduction force of the designed reduction robot can reach 200 N. The experimental results show that the robot not only has the characteristics of high precision and high load of parallel robot, but also has the characteristics of large workspace of series robot.","PeriodicalId":49956,"journal":{"name":"Journal of Vibroengineering","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43574869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Discrete sliding mode control method for particle swarm optimization-based brushless DC motor of electric vehicle 基于粒子群优化的电动汽车无刷直流电机离散滑模控制方法
IF 1 Q4 ENGINEERING, MECHANICAL Pub Date : 2023-04-10 DOI: 10.21595/jve.2023.22978
Fei Wang, Qiongzhen Mei, Xiaolei Xin
Brushless DC motor (BLDCM) is a multivariable nonlinear time-varying system, which is difficult to control. The discrete sliding mode control method for BLDCM of electric vehicle on the basis of particle swarm optimization (PSO) is studied to improve the application of BLDCM in electric vehicle. The mathematical model of BLDCM of electric vehicle is established using the state formula. Based on the mathematical model of BLDCM, through the analysis of electromagnetic torque control of BLDCM, it is clear that controlling the angle between rotor flux and stator flux can accurately control the electromagnetic torque of BLDCM. The adaptive discrete sliding mode controller (SMC) is set to control the electromagnetic torque of BLDCM of electric vehicle, and the PSO algorithm is adopted to obtain the optimal parameters of the adaptive discrete SMC to realize the discrete sliding mode control of BLDCM of electric vehicle. According to experimental results, the proposed method can achieve the accurate control of torque and speed of BLDCM of electric vehicle, and increase the application of BLDCM in electric vehicle.
无刷直流电动机(BLDCM)是一个多变量非线性时变系统,控制困难。研究了基于粒子群优化(PSO)的电动汽车无刷电机离散滑模控制方法,以提高无刷电机在电动汽车中的应用。利用状态公式建立了电动汽车无刷直流电机的数学模型。在建立无刷直流电机数学模型的基础上,通过对无刷直流电机电磁转矩控制的分析,明确了控制转子磁链与定子磁链的夹角可以精确控制无刷直流电机的电磁转矩。设置自适应离散滑模控制器(SMC)来控制电动汽车无刷电机的电磁转矩,采用粒子群算法获得自适应离散滑模控制器的最优参数,实现电动汽车无刷电机的离散滑模控制。实验结果表明,该方法可以实现电动汽车无刷直流电机转矩和转速的精确控制,增加了无刷直流电机在电动汽车上的应用。
{"title":"Discrete sliding mode control method for particle swarm optimization-based brushless DC motor of electric vehicle","authors":"Fei Wang, Qiongzhen Mei, Xiaolei Xin","doi":"10.21595/jve.2023.22978","DOIUrl":"https://doi.org/10.21595/jve.2023.22978","url":null,"abstract":"Brushless DC motor (BLDCM) is a multivariable nonlinear time-varying system, which is difficult to control. The discrete sliding mode control method for BLDCM of electric vehicle on the basis of particle swarm optimization (PSO) is studied to improve the application of BLDCM in electric vehicle. The mathematical model of BLDCM of electric vehicle is established using the state formula. Based on the mathematical model of BLDCM, through the analysis of electromagnetic torque control of BLDCM, it is clear that controlling the angle between rotor flux and stator flux can accurately control the electromagnetic torque of BLDCM. The adaptive discrete sliding mode controller (SMC) is set to control the electromagnetic torque of BLDCM of electric vehicle, and the PSO algorithm is adopted to obtain the optimal parameters of the adaptive discrete SMC to realize the discrete sliding mode control of BLDCM of electric vehicle. According to experimental results, the proposed method can achieve the accurate control of torque and speed of BLDCM of electric vehicle, and increase the application of BLDCM in electric vehicle.","PeriodicalId":49956,"journal":{"name":"Journal of Vibroengineering","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44518054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Research on dynamic characteristics of marine engine transmission system 船用发动机传动系统动态特性研究
IF 1 Q4 ENGINEERING, MECHANICAL Pub Date : 2023-04-09 DOI: 10.21595/jve.2023.22933
Wei Sun
As the main component of marine engine, the transmission system often produces serious vibration and noise, which will significantly affect the performance and service life of the driving mechanism. In order to provide reasonable structural design basis for marine engine transmission system, the dynamic characteristics under different working conditions were studied in this paper. A simplified rectangular structure was applied to express the instantaneous motion state model of the chain link, and the equation was expressed according to Euler kinematics theory. The MNF (modal neutral file) model was derived by making the links and pins flexible parts, and the rigid flexible coupling model of the transmission system was established based on ADAMS. Since invalid constraints were adjusted and replaced, the transmission system model could be simulated and calculated precisely under the conditions of different tension, spindle rotation speed and driving sprocket teeth number. By changing the model parameters through the single variable method, the variation rules of transmission ratio, spindle radial force, transmission ratio deviation and maximum transient stress of chain link were obtained respectively. According to the design and construction of vibration test platform, the simulation result was verified, and the spectrum response results of the chain drive system were obtained. The results show that the rigid flexible coupling model can achieve high simulation accuracy in the chain drive system. Reasonable tension and sprocket teeth number can not only reduce the amplitude, but also reduce the fluctuation of output torque and transmission ratio.
作为船用发动机的主要部件,传动系统经常产生严重的振动和噪声,这将显著影响传动机构的性能和使用寿命。为了给船舶发动机传动系统提供合理的结构设计依据,本文对不同工况下的传动系统动态特性进行了研究。采用简化的矩形结构来表示链环的瞬时运动状态模型,并根据欧拉运动学理论表示其方程。通过将连杆和销钉制成柔性部件,建立了模态中性文件(MNF)模型,并基于ADAMS建立了传动系统的刚柔耦合模型。通过调整和替换无效约束,可以对不同张力、主轴转速和驱动链轮齿数条件下的传动系统模型进行精确仿真计算。通过单变量法改变模型参数,分别得到了传动比、主轴径向力、传动比偏差和链环最大瞬态应力的变化规律。根据振动试验平台的设计和搭建,对仿真结果进行了验证,得到了链条传动系统的频谱响应结果。结果表明,该刚柔耦合模型在链传动系统中能够达到较高的仿真精度。合理的张力和链轮齿数不仅可以减小振幅,还可以减小输出转矩和传动比的波动。
{"title":"Research on dynamic characteristics of marine engine transmission system","authors":"Wei Sun","doi":"10.21595/jve.2023.22933","DOIUrl":"https://doi.org/10.21595/jve.2023.22933","url":null,"abstract":"As the main component of marine engine, the transmission system often produces serious vibration and noise, which will significantly affect the performance and service life of the driving mechanism. In order to provide reasonable structural design basis for marine engine transmission system, the dynamic characteristics under different working conditions were studied in this paper. A simplified rectangular structure was applied to express the instantaneous motion state model of the chain link, and the equation was expressed according to Euler kinematics theory. The MNF (modal neutral file) model was derived by making the links and pins flexible parts, and the rigid flexible coupling model of the transmission system was established based on ADAMS. Since invalid constraints were adjusted and replaced, the transmission system model could be simulated and calculated precisely under the conditions of different tension, spindle rotation speed and driving sprocket teeth number. By changing the model parameters through the single variable method, the variation rules of transmission ratio, spindle radial force, transmission ratio deviation and maximum transient stress of chain link were obtained respectively. According to the design and construction of vibration test platform, the simulation result was verified, and the spectrum response results of the chain drive system were obtained. The results show that the rigid flexible coupling model can achieve high simulation accuracy in the chain drive system. Reasonable tension and sprocket teeth number can not only reduce the amplitude, but also reduce the fluctuation of output torque and transmission ratio.","PeriodicalId":49956,"journal":{"name":"Journal of Vibroengineering","volume":" ","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41955114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
期刊
Journal of Vibroengineering
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1