Pub Date : 2023-01-01DOI: 10.23977/jemm.2023.080101
Dewang Li
: In order to improve the fatigue test accuracy and efficiency of full-scale structure of wind turbine blades, an effective load matching method for full-scale structure fatigue test of wind turbine blades under biaxial loading is proposed. The blade biaxial loading fatigue test scheme is designed. The transfer matrix method is used to calculate the test bending moment under biaxial loading. The particle swarm optimization algorithm is designed to optimize the position and mass of the excitation device in the flap-wise and edgewise directions and the position, mass and quantity of the fixed counterweight. Based on this, the calculation model of the test bending moment and the data of the target bending moment are integrated into the particle swarm optimization algorithm to achieve the optimal matching of the biaxial loading fatigue test load, Finally, a numerical example is given to verify it. The results show that this method can make the test load closer to the target load, further accelerate the popularization of biaxial loading fatigue test, and provide a certain theoretical reference and application value for engineering practice.
{"title":"Wind turbine blades load matching method under biaxial fatigue test","authors":"Dewang Li","doi":"10.23977/jemm.2023.080101","DOIUrl":"https://doi.org/10.23977/jemm.2023.080101","url":null,"abstract":": In order to improve the fatigue test accuracy and efficiency of full-scale structure of wind turbine blades, an effective load matching method for full-scale structure fatigue test of wind turbine blades under biaxial loading is proposed. The blade biaxial loading fatigue test scheme is designed. The transfer matrix method is used to calculate the test bending moment under biaxial loading. The particle swarm optimization algorithm is designed to optimize the position and mass of the excitation device in the flap-wise and edgewise directions and the position, mass and quantity of the fixed counterweight. Based on this, the calculation model of the test bending moment and the data of the target bending moment are integrated into the particle swarm optimization algorithm to achieve the optimal matching of the biaxial loading fatigue test load, Finally, a numerical example is given to verify it. The results show that this method can make the test load closer to the target load, further accelerate the popularization of biaxial loading fatigue test, and provide a certain theoretical reference and application value for engineering practice.","PeriodicalId":32485,"journal":{"name":"Journal of Engineering Mechanics and Machinery","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68788774","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}
Pub Date : 2023-01-01DOI: 10.23977/jemm.2023.080103
Hengqiang Liao
: With the improvement of the social demand for our daily life, the products needed in our life are getting higher and higher, and the requirements for the mechanical structure and functions need to be constantly improved, which leads to an increase in the demand for unequal distance threads. This will further improve the processing technology and processing efficiency of unequal distance threads. In the following, we will talk about the processing method of rectangular unequal distance threads, focusing on the basic idea of NC processing of unequal distance threads Programming skills, rough and finish machining methods in CNC machining, tool application.
{"title":"Processing Method of Rectangular Unequal Distance Thread","authors":"Hengqiang Liao","doi":"10.23977/jemm.2023.080103","DOIUrl":"https://doi.org/10.23977/jemm.2023.080103","url":null,"abstract":": With the improvement of the social demand for our daily life, the products needed in our life are getting higher and higher, and the requirements for the mechanical structure and functions need to be constantly improved, which leads to an increase in the demand for unequal distance threads. This will further improve the processing technology and processing efficiency of unequal distance threads. In the following, we will talk about the processing method of rectangular unequal distance threads, focusing on the basic idea of NC processing of unequal distance threads Programming skills, rough and finish machining methods in CNC machining, tool application.","PeriodicalId":32485,"journal":{"name":"Journal of Engineering Mechanics and Machinery","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68788786","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}
Pub Date : 2023-01-01DOI: 10.23977/jemm.2023.080207
Cheng Li, J. Wen
: In the printing process of 3D technology, the porosity defects caused by relevant reasons are often serious. For this, it is necessary to grasp its formation mechanism and do a good job of quality control in the application process of 3D printing technology, which is of great significance for the wide application of 3D printing technology. This paper gives a brief description of 3D printing technology, focusing on the formation mechanism and control measures of pore defects in metal 3D printing.
{"title":"Formation and Control of Pore Defects in Metal 3D Printing","authors":"Cheng Li, J. Wen","doi":"10.23977/jemm.2023.080207","DOIUrl":"https://doi.org/10.23977/jemm.2023.080207","url":null,"abstract":": In the printing process of 3D technology, the porosity defects caused by relevant reasons are often serious. For this, it is necessary to grasp its formation mechanism and do a good job of quality control in the application process of 3D printing technology, which is of great significance for the wide application of 3D printing technology. This paper gives a brief description of 3D printing technology, focusing on the formation mechanism and control measures of pore defects in metal 3D printing.","PeriodicalId":32485,"journal":{"name":"Journal of Engineering Mechanics and Machinery","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68788904","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}
Pub Date : 2023-01-01DOI: 10.23977/jemm.2023.080310
The 5ml syringe automatic packaging machine designed in this paper is mainly composed of mechanical structure and control system. The machine is based on the traditional vertical packaging machine, syringe automatic packaging machine can complete the syringe from the clutter of syringes to achieve a single sequential packaging, can achieve the whole process from feeding, film forming, and then the bag heat sealing, shear. The feeding is achieved by vibrating discs, the heat sealing device is controlled by a cylinder heat sealing jig to seal the plastic film longitudinally and horizontally, and the serrated blade is used to cut, the whole machine is compact and easy to install and manipulate. The packaging machine is highly automated, the user only needs to put the syringe into the vibrating plate, through the machine's servo control, can achieve a key start, but also through the adjustment of the software parameters to achieve control of the syringe packaging speed.
{"title":"Design of an Automatic Packaging Machine for Syringes","authors":"","doi":"10.23977/jemm.2023.080310","DOIUrl":"https://doi.org/10.23977/jemm.2023.080310","url":null,"abstract":"The 5ml syringe automatic packaging machine designed in this paper is mainly composed of mechanical structure and control system. The machine is based on the traditional vertical packaging machine, syringe automatic packaging machine can complete the syringe from the clutter of syringes to achieve a single sequential packaging, can achieve the whole process from feeding, film forming, and then the bag heat sealing, shear. The feeding is achieved by vibrating discs, the heat sealing device is controlled by a cylinder heat sealing jig to seal the plastic film longitudinally and horizontally, and the serrated blade is used to cut, the whole machine is compact and easy to install and manipulate. The packaging machine is highly automated, the user only needs to put the syringe into the vibrating plate, through the machine's servo control, can achieve a key start, but also through the adjustment of the software parameters to achieve control of the syringe packaging speed.","PeriodicalId":32485,"journal":{"name":"Journal of Engineering Mechanics and Machinery","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135500745","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}
Pub Date : 2023-01-01DOI: 10.23977/jemm.2023.080306
There are Tibetan Buddhist architectures in Xinjiang, Sichuan, Yunnan, Gansu, Qinghai, Shanxi, Hebei, Beijing and other places. The Tibetan Buddhist architecture in these areas is based on the combination of Sino-Tibetan architectural forms, and blends the architectural styles of other ethnic minorities such as Mongolia and Hui, showing a variety of changes. This paper discusses the combination of Sino-Tibetan architecture in Tibet, other regions and western Inner Mongolia respectively, and compares the regional characteristics of different regions.
{"title":"Research on the Combination of Sino-Tibetan Architecture from the Perspective of Multi-Cultural Integration","authors":"","doi":"10.23977/jemm.2023.080306","DOIUrl":"https://doi.org/10.23977/jemm.2023.080306","url":null,"abstract":"There are Tibetan Buddhist architectures in Xinjiang, Sichuan, Yunnan, Gansu, Qinghai, Shanxi, Hebei, Beijing and other places. The Tibetan Buddhist architecture in these areas is based on the combination of Sino-Tibetan architectural forms, and blends the architectural styles of other ethnic minorities such as Mongolia and Hui, showing a variety of changes. This paper discusses the combination of Sino-Tibetan architecture in Tibet, other regions and western Inner Mongolia respectively, and compares the regional characteristics of different regions.","PeriodicalId":32485,"journal":{"name":"Journal of Engineering Mechanics and Machinery","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135502339","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}
Pub Date : 2023-01-01DOI: 10.23977/jemm.2023.080405
: Based on the idea of DFA, this study proposes an optimization algorithm for the shaft and hole assembly accuracy and cost. By simplifying and analysing the formula proposed by Abdel-Malek for the calculation of shaft and hole assembly throughput, a mathematical model is established to explore the selection of optimal values for machining cost, part machining tolerance and equipment positioning accuracy. And, the relationship between shaft and hole assembly clearance and spring wire diameter is analysed. The study shows that, within the constraints of cost, the optimum value is selected in eight cases, with different strategies. The maximum resistance to insertion is achieved when the spring wire diameter reaches a value of 0.8 times the difference between the average diameter of the hole and the spring. In addition, this study refines the traditional DFA design system by providing the appropriate algorithms to lay the foundation for software implementation.
{"title":"DFA-based algorithm for optimizing the accuracy and cost of shaft and hole assembly","authors":"","doi":"10.23977/jemm.2023.080405","DOIUrl":"https://doi.org/10.23977/jemm.2023.080405","url":null,"abstract":": Based on the idea of DFA, this study proposes an optimization algorithm for the shaft and hole assembly accuracy and cost. By simplifying and analysing the formula proposed by Abdel-Malek for the calculation of shaft and hole assembly throughput, a mathematical model is established to explore the selection of optimal values for machining cost, part machining tolerance and equipment positioning accuracy. And, the relationship between shaft and hole assembly clearance and spring wire diameter is analysed. The study shows that, within the constraints of cost, the optimum value is selected in eight cases, with different strategies. The maximum resistance to insertion is achieved when the spring wire diameter reaches a value of 0.8 times the difference between the average diameter of the hole and the spring. In addition, this study refines the traditional DFA design system by providing the appropriate algorithms to lay the foundation for software implementation.","PeriodicalId":32485,"journal":{"name":"Journal of Engineering Mechanics and Machinery","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134882274","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}
Pub Date : 2022-01-01DOI: 10.23977/jemm.2022.070104
Guanghui Bao, Wencheng Wang, Zijian Zhao
Aiming at the problems of older people often forget to take medicine or take the mistake dose, The structure of an powder dispenser was designed, which was composed of a powder storage device, a powder delivery device, a powder collection device, a powder weighing device, a water heating device, a powder preparation device and a drug delivery device. The medicine dispenser is equipped with three reminding alarm clocks to meet the user's medication needs in three different time periods: morning, noon and evening. the alarm sounds, and the user only needs to press the corresponding powder button to realize the medicine out. The device can help the elderly and children simplify the steps of taking powdered medicines, prevent safety accidents such as burns when taking the powdered medicines, and enable the elderly and children to obtain the prepared medicines with one button and drink them directly.
{"title":"The Structure Design of a New Kind Powder Dispenser","authors":"Guanghui Bao, Wencheng Wang, Zijian Zhao","doi":"10.23977/jemm.2022.070104","DOIUrl":"https://doi.org/10.23977/jemm.2022.070104","url":null,"abstract":"Aiming at the problems of older people often forget to take medicine or take the mistake dose, The structure of an powder dispenser was designed, which was composed of a powder storage device, a powder delivery device, a powder collection device, a powder weighing device, a water heating device, a powder preparation device and a drug delivery device. The medicine dispenser is equipped with three reminding alarm clocks to meet the user's medication needs in three different time periods: morning, noon and evening. the alarm sounds, and the user only needs to press the corresponding powder button to realize the medicine out. The device can help the elderly and children simplify the steps of taking powdered medicines, prevent safety accidents such as burns when taking the powdered medicines, and enable the elderly and children to obtain the prepared medicines with one button and drink them directly.","PeriodicalId":32485,"journal":{"name":"Journal of Engineering Mechanics and Machinery","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68787830","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}
Pub Date : 2022-01-01DOI: 10.23977/jemm.2022.070404
Wenshu Wang, Bing Lv, Z. Ren, C. Shi
: With the improvement of people’s living standard, people put forward higher requirements for children’s stroller. The children’s stroller only with strong functionality and high safety can no longer meet the standard of good experience for users. This paper takes the user demand as the guide, finds the pain points and design opportunities of the children’s stroller by establishing the user behavior map. Combined with the hierarchy of user experience needs, this paper makes a design and research on children’s stroller, and finally puts forward a set of design scheme, which is expected to provide reference for the improvement of the user experience of children’s stroller.
{"title":"Research on the Design of Children's Stroller Based on User Experience","authors":"Wenshu Wang, Bing Lv, Z. Ren, C. Shi","doi":"10.23977/jemm.2022.070404","DOIUrl":"https://doi.org/10.23977/jemm.2022.070404","url":null,"abstract":": With the improvement of people’s living standard, people put forward higher requirements for children’s stroller. The children’s stroller only with strong functionality and high safety can no longer meet the standard of good experience for users. This paper takes the user demand as the guide, finds the pain points and design opportunities of the children’s stroller by establishing the user behavior map. Combined with the hierarchy of user experience needs, this paper makes a design and research on children’s stroller, and finally puts forward a set of design scheme, which is expected to provide reference for the improvement of the user experience of children’s stroller.","PeriodicalId":32485,"journal":{"name":"Journal of Engineering Mechanics and Machinery","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68788278","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}
Pub Date : 2022-01-01DOI: 10.23977/jemm.2022.070310
Yuecheng Wang, Minqi Li, Hao Tan
: In this paper, a three-dimensional borehole track design is carried out for complex horizontal wells. Based on the two-dimensional borehole track model, a seven-segment ideal three-dimensional borehole track model is established by considering the parameter range, frictional torque and resistance, and borehole track positioning hit rate. After that, Monte Carlo simulation is applied to find the optimal design of the borehole track. Based on fuzzy comprehensive evaluation, horizontal well drilling completion acceptance criteria are established. Three evaluation factors of cost, risk, and difficulty of construction are determined to constitute the factor set; five rubrics of excellent, good, moderate, qualified and unqualified are used to constitute the evaluation set. After deriving the affiliation matrix, the final evaluation criteria are determined by using the fuzzy judgment matrix to calculate the superiority and inferiority ratings of the mechanical probability model compared with the developed criteria.
{"title":"Seven-stage complex horizontal well 3D borehole track design","authors":"Yuecheng Wang, Minqi Li, Hao Tan","doi":"10.23977/jemm.2022.070310","DOIUrl":"https://doi.org/10.23977/jemm.2022.070310","url":null,"abstract":": In this paper, a three-dimensional borehole track design is carried out for complex horizontal wells. Based on the two-dimensional borehole track model, a seven-segment ideal three-dimensional borehole track model is established by considering the parameter range, frictional torque and resistance, and borehole track positioning hit rate. After that, Monte Carlo simulation is applied to find the optimal design of the borehole track. Based on fuzzy comprehensive evaluation, horizontal well drilling completion acceptance criteria are established. Three evaluation factors of cost, risk, and difficulty of construction are determined to constitute the factor set; five rubrics of excellent, good, moderate, qualified and unqualified are used to constitute the evaluation set. After deriving the affiliation matrix, the final evaluation criteria are determined by using the fuzzy judgment matrix to calculate the superiority and inferiority ratings of the mechanical probability model compared with the developed criteria.","PeriodicalId":32485,"journal":{"name":"Journal of Engineering Mechanics and Machinery","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68788208","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}
: The positioning mechanism of conventional transfer vehicles commonly employs a hydraulic or pneumatic driving mode, which requires control valves, actuators and pipe fittings, causing problems such as complex composition, high cost and inconvenient hauling of pipes and accessories when installed on transfer vehicles. In order to avoid the above difficulties, an electrical localization mechanism using electromagnets as power units has been designed. First, it explains its working principles and composition. Moreover, the implementation scheme and the structure of the electromagnetic thrust are then detailed, including the frame, the telescopic components and the power equipment. Next, based on the force analysis of the locator, we introduce the calculation of the electromagnetic thrust to the locator and design a reasonable angle between the locator and the pin. Finally, by switching the electromagnet on and off, the mechanism drives the positioning plate to reciprocate, thus enabling multi-position accurate positioning and rapid un-positioning of the transfer vehicle, contributing to the compact, low-cost and environmentally friendly maintenance of the mechanism.
{"title":"Design Optimization of an Electric Positioning Mechanism","authors":"Jiguang Liu, Zhikuan Yang, Peipei Liang, Xiaogang Fang, Tongfei Li, Xiaowen Zhao, Youwen Yang","doi":"10.23977/jemm.2022.070405","DOIUrl":"https://doi.org/10.23977/jemm.2022.070405","url":null,"abstract":": The positioning mechanism of conventional transfer vehicles commonly employs a hydraulic or pneumatic driving mode, which requires control valves, actuators and pipe fittings, causing problems such as complex composition, high cost and inconvenient hauling of pipes and accessories when installed on transfer vehicles. In order to avoid the above difficulties, an electrical localization mechanism using electromagnets as power units has been designed. First, it explains its working principles and composition. Moreover, the implementation scheme and the structure of the electromagnetic thrust are then detailed, including the frame, the telescopic components and the power equipment. Next, based on the force analysis of the locator, we introduce the calculation of the electromagnetic thrust to the locator and design a reasonable angle between the locator and the pin. Finally, by switching the electromagnet on and off, the mechanism drives the positioning plate to reciprocate, thus enabling multi-position accurate positioning and rapid un-positioning of the transfer vehicle, contributing to the compact, low-cost and environmentally friendly maintenance of the mechanism.","PeriodicalId":32485,"journal":{"name":"Journal of Engineering Mechanics and Machinery","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68788290","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}
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