Pub Date : 2011-07-15DOI: 10.1109/MACE.2011.5987718
Yuejing Luo, B. Qiu, Yafei Zhao, Shulin Zhou
In this paper, the reasons for diseases of long span two-way curved arch bridges is analysis and the strengthening methods are illustrated; Research is make on this case and some new materials is used into the strengthening of the bridges; After the strengthening works finished, the efforts is evaluated.
{"title":"Research on the strengthening method of long span two-way curved arch bridges","authors":"Yuejing Luo, B. Qiu, Yafei Zhao, Shulin Zhou","doi":"10.1109/MACE.2011.5987718","DOIUrl":"https://doi.org/10.1109/MACE.2011.5987718","url":null,"abstract":"In this paper, the reasons for diseases of long span two-way curved arch bridges is analysis and the strengthening methods are illustrated; Research is make on this case and some new materials is used into the strengthening of the bridges; After the strengthening works finished, the efforts is evaluated.","PeriodicalId":6400,"journal":{"name":"2011 Second International Conference on Mechanic Automation and Control Engineering","volume":"15 1","pages":"3388-3391"},"PeriodicalIF":0.0,"publicationDate":"2011-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75384120","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 : 2011-07-15DOI: 10.1109/MACE.2011.5986944
Jing Zhang, Bin-Zhen Chen, S. Lyu
Cycloid planetary gear plays an important role in precision transmission. Accuracy control of transmission is an extra crucial requirement for design and manufacture. Firstly presented a mathematical approach for precision analysis on cycloid gear, it enable predict mesh stiffness, backlash and angular transmission error with consideration of manufacture tolerance, elastic deformation in cycloid gear. Secondly, the solution was developed for angular transmission error analysis in K-H-V reducer, in which includes effect from bearing (stiffness and initial mounting conditions), crank shaft (offset error and flexibility). Finally, experimental study was conducted for validation which showed good agreement with simulation.
{"title":"Mathematical model and analysis on cycloid planetary gear","authors":"Jing Zhang, Bin-Zhen Chen, S. Lyu","doi":"10.1109/MACE.2011.5986944","DOIUrl":"https://doi.org/10.1109/MACE.2011.5986944","url":null,"abstract":"Cycloid planetary gear plays an important role in precision transmission. Accuracy control of transmission is an extra crucial requirement for design and manufacture. Firstly presented a mathematical approach for precision analysis on cycloid gear, it enable predict mesh stiffness, backlash and angular transmission error with consideration of manufacture tolerance, elastic deformation in cycloid gear. Secondly, the solution was developed for angular transmission error analysis in K-H-V reducer, in which includes effect from bearing (stiffness and initial mounting conditions), crank shaft (offset error and flexibility). Finally, experimental study was conducted for validation which showed good agreement with simulation.","PeriodicalId":6400,"journal":{"name":"2011 Second International Conference on Mechanic Automation and Control Engineering","volume":"40 1","pages":"400-403"},"PeriodicalIF":0.0,"publicationDate":"2011-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75750051","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 : 2011-07-15DOI: 10.1109/MACE.2011.5988735
C. Pengfei, Li Hanchen, Song Lixun, X. Juan
The dielectric properties and its variation of CaCu3Ti4O12 (CCTO) materials induced by the process conditions are reviewed in this paper. On the basis of heterogeneous microstructure in ceramics and single crystal, the extrinsic Maxwell-Wagner polarization mechanism of internal barrier layer capacitance (IBLC) model is discussed adequately. According to the especial crystal structure and atomic structure, possible grain semiconducting mechanism is proposed. At the end of the paper, theoretical problems in CCTO material, Maxwell-Wagner polarization and dielectric spectroscopy analysis are analyzed.
{"title":"Dielectric response of CaCu3Ti4O12 materials","authors":"C. Pengfei, Li Hanchen, Song Lixun, X. Juan","doi":"10.1109/MACE.2011.5988735","DOIUrl":"https://doi.org/10.1109/MACE.2011.5988735","url":null,"abstract":"The dielectric properties and its variation of CaCu3Ti4O12 (CCTO) materials induced by the process conditions are reviewed in this paper. On the basis of heterogeneous microstructure in ceramics and single crystal, the extrinsic Maxwell-Wagner polarization mechanism of internal barrier layer capacitance (IBLC) model is discussed adequately. According to the especial crystal structure and atomic structure, possible grain semiconducting mechanism is proposed. At the end of the paper, theoretical problems in CCTO material, Maxwell-Wagner polarization and dielectric spectroscopy analysis are analyzed.","PeriodicalId":6400,"journal":{"name":"2011 Second International Conference on Mechanic Automation and Control Engineering","volume":"47 1","pages":"7303-7306"},"PeriodicalIF":0.0,"publicationDate":"2011-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74206467","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 : 2011-07-15DOI: 10.1109/MACE.2011.5987056
Y. Wei, X. Zhang, Yankui Liu
In accordance with the theory of contact mechanics, the radial stiffness, maximum contact stress and maximum radial load of pre-loaded hollow and solid cylindrical roller bearings are simulated with finite element method. And the effects of pre-load magnitude on the radial stiffness, maximum contact stress and maximum radial load of the bearings are researched mainly. The results show that the larger pre-load magnitude is, the larger the radial stiffness, the maximum contact stress and the maximum radial load are. Rational combination of pre-load magnitude and hollow ratio does not only enhance the radial stiffness, but also depress the maximum contact stress. The research offers the references for designing and using the pre-loaded cylindrical roller bearings.
{"title":"The effects of pre-load magnitude on the radial loading performance of pre-loaded cylindrical roller bearings","authors":"Y. Wei, X. Zhang, Yankui Liu","doi":"10.1109/MACE.2011.5987056","DOIUrl":"https://doi.org/10.1109/MACE.2011.5987056","url":null,"abstract":"In accordance with the theory of contact mechanics, the radial stiffness, maximum contact stress and maximum radial load of pre-loaded hollow and solid cylindrical roller bearings are simulated with finite element method. And the effects of pre-load magnitude on the radial stiffness, maximum contact stress and maximum radial load of the bearings are researched mainly. The results show that the larger pre-load magnitude is, the larger the radial stiffness, the maximum contact stress and the maximum radial load are. Rational combination of pre-load magnitude and hollow ratio does not only enhance the radial stiffness, but also depress the maximum contact stress. The research offers the references for designing and using the pre-loaded cylindrical roller bearings.","PeriodicalId":6400,"journal":{"name":"2011 Second International Conference on Mechanic Automation and Control Engineering","volume":"6 1","pages":"831-834"},"PeriodicalIF":0.0,"publicationDate":"2011-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74281513","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 : 2011-07-15DOI: 10.1109/MACE.2011.5988668
Qiang Liu, Nan Shi, H. Liu, Jiang Yu
The commercialization of LOFT solves the major problem of capital source that occurred in the former process of historic building reconstruction. At the same time, the spatial characteristics of LOFT marked by strong senses of nature, authenticity, and romance help us to see the possibility of the potential development concerned with buildings' self-growth and city's organic renewal. This article explores the reasons of why LOFT culture was being created and chronicles its development history. Besides, combined with certain architectural cases, this article analyzes the influences on residential buildings and commercial buildings exerted by LOFT in terms of its spatial patterns, formal styles, and commercial values.
{"title":"The rebuilt of loft and the reuse of old industrial buildings","authors":"Qiang Liu, Nan Shi, H. Liu, Jiang Yu","doi":"10.1109/MACE.2011.5988668","DOIUrl":"https://doi.org/10.1109/MACE.2011.5988668","url":null,"abstract":"The commercialization of LOFT solves the major problem of capital source that occurred in the former process of historic building reconstruction. At the same time, the spatial characteristics of LOFT marked by strong senses of nature, authenticity, and romance help us to see the possibility of the potential development concerned with buildings' self-growth and city's organic renewal. This article explores the reasons of why LOFT culture was being created and chronicles its development history. Besides, combined with certain architectural cases, this article analyzes the influences on residential buildings and commercial buildings exerted by LOFT in terms of its spatial patterns, formal styles, and commercial values.","PeriodicalId":6400,"journal":{"name":"2011 Second International Conference on Mechanic Automation and Control Engineering","volume":"7 1","pages":"7031-7033"},"PeriodicalIF":0.0,"publicationDate":"2011-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74367573","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 : 2011-07-15DOI: 10.1109/MACE.2011.5987102
N. An, Yu An
A water-level controller has been developed on hysteresis effect. In a greenhouse the sump tank is often located underground. Water levels are monitored with a high and low alarm. The sump pump is turned off and on according to the water levels. In a general way the sump pump is turned off and on by floats in the tank. Floats may be corroded and wear out prematurely because of the bad condition in the tank. In our project a controller for bad conditions is designed. A low-voltage electronic circuit that senses upper and lower water levels is used for alarms and sump pump activation. Since the electronic sensor has no moving mechanical parts, it eliminates problems with corrosion and wear and tear. It is cheaper and more durable than float system and can be used treatment of greenhouse recirculation water and the irrigation system in a greenhouse.
{"title":"A water-level controller for greenhouse sump tank","authors":"N. An, Yu An","doi":"10.1109/MACE.2011.5987102","DOIUrl":"https://doi.org/10.1109/MACE.2011.5987102","url":null,"abstract":"A water-level controller has been developed on hysteresis effect. In a greenhouse the sump tank is often located underground. Water levels are monitored with a high and low alarm. The sump pump is turned off and on according to the water levels. In a general way the sump pump is turned off and on by floats in the tank. Floats may be corroded and wear out prematurely because of the bad condition in the tank. In our project a controller for bad conditions is designed. A low-voltage electronic circuit that senses upper and lower water levels is used for alarms and sump pump activation. Since the electronic sensor has no moving mechanical parts, it eliminates problems with corrosion and wear and tear. It is cheaper and more durable than float system and can be used treatment of greenhouse recirculation water and the irrigation system in a greenhouse.","PeriodicalId":6400,"journal":{"name":"2011 Second International Conference on Mechanic Automation and Control Engineering","volume":"27 1","pages":"1004-1006"},"PeriodicalIF":0.0,"publicationDate":"2011-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78723755","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 : 2011-07-15DOI: 10.1109/MACE.2011.5988268
Yifan Li, Jianhui Lin
The vibration of internal structure and car body of rolling stock influences the safety of train operation directly. Due to non-stationary feature of vibration signal, traditional spectrum analysis and PSD methods are limited. In this paper, mechanical vibration transmission relationship is researched based on wavelet denoising technique and higher order spectrum analysis by the use of the character that wavelet decomposition possess the function of self-adapting time-frequency localization characteristic and higher order spectrum can restrain the additive gauss noise, putting forward frequency response function based on 1.5 dimension spectrum. The effect of vibration transmission relationship based on wavelet de-noising and 1.5 dimension spectrum is better than power spectrum though analyzing and comparing, the results could be taken into consideration in vehicle structural design.
{"title":"Vibration transmission analyze based on wavelet theory and higher order spectrum","authors":"Yifan Li, Jianhui Lin","doi":"10.1109/MACE.2011.5988268","DOIUrl":"https://doi.org/10.1109/MACE.2011.5988268","url":null,"abstract":"The vibration of internal structure and car body of rolling stock influences the safety of train operation directly. Due to non-stationary feature of vibration signal, traditional spectrum analysis and PSD methods are limited. In this paper, mechanical vibration transmission relationship is researched based on wavelet denoising technique and higher order spectrum analysis by the use of the character that wavelet decomposition possess the function of self-adapting time-frequency localization characteristic and higher order spectrum can restrain the additive gauss noise, putting forward frequency response function based on 1.5 dimension spectrum. The effect of vibration transmission relationship based on wavelet de-noising and 1.5 dimension spectrum is better than power spectrum though analyzing and comparing, the results could be taken into consideration in vehicle structural design.","PeriodicalId":6400,"journal":{"name":"2011 Second International Conference on Mechanic Automation and Control Engineering","volume":"11 1","pages":"5492-5495"},"PeriodicalIF":0.0,"publicationDate":"2011-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78386232","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}
This paper presents numerical simulation for heat transfer of radiant floor heating system, whose heat source is air-source heat pump (ASHP). The results of simulation for heat transfer show that: 1) With the increasing of the tube spacing in floor layer, the average floor surface temperature decreases and temperature fluctuations enlarge, in the same time practical experiments show that the simulation results are reliable.2) The thinner the floor layer structure, the higher the floor surface temperature, and the more thermal inertia and cost of floor, but the less capacity of heat storage. The thickness of the floor layer structure should be decided by actual design requirements for space heating.3) Floor radiant heating capacity will be significantly reduced with the decreasing of thermal conductivity of floor surface layer. The material of floor surface layer, whose heat transfer coefficient is small, should be avoided to be use in practical engineering.
{"title":"The effect of floor structure on heat transfer of radiant floor heating system with air-source heat pump (ASHP)","authors":"Xiangrui Meng, Xinling Ma, Xinli Wei, Zhangchuan Zeng","doi":"10.1109/MACE.2011.5988459","DOIUrl":"https://doi.org/10.1109/MACE.2011.5988459","url":null,"abstract":"This paper presents numerical simulation for heat transfer of radiant floor heating system, whose heat source is air-source heat pump (ASHP). The results of simulation for heat transfer show that: 1) With the increasing of the tube spacing in floor layer, the average floor surface temperature decreases and temperature fluctuations enlarge, in the same time practical experiments show that the simulation results are reliable.2) The thinner the floor layer structure, the higher the floor surface temperature, and the more thermal inertia and cost of floor, but the less capacity of heat storage. The thickness of the floor layer structure should be decided by actual design requirements for space heating.3) Floor radiant heating capacity will be significantly reduced with the decreasing of thermal conductivity of floor surface layer. The material of floor surface layer, whose heat transfer coefficient is small, should be avoided to be use in practical engineering.","PeriodicalId":6400,"journal":{"name":"2011 Second International Conference on Mechanic Automation and Control Engineering","volume":"77 1","pages":"6221-6224"},"PeriodicalIF":0.0,"publicationDate":"2011-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78389594","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 : 2011-07-15DOI: 10.1109/MACE.2011.5986896
Tieliu Wang, Shang-Xian Jin
As one of the fastest growing detectors in recent years, infrared detectors are widely used in military and civil use, and play an irreplaceable role. By analysing and generalizing some of the relevant english literature of recent years, This article describes the development of a variety of new infrared detectors domestic and abroad, including Pb-salt array detector -. double-color/multicolor MCT (HgCdTe) detector, MCT array detector, planar linear array InGaAs detector and so on. Self-cooled , dark current correction of Pb-salt detectors; The developments of third generation MCT devices in array size -, double-color/multicolor, very long wavelength application of photovoltaic tech-nology , amplifier capability ; The current-voltage measurement of eight element planar linear array InGaAs detector , the difference between a peak response rate obtained through the signah noise, and the corresponding spectra and the theoretical values and etc were analyzed. According to the current development state of infrared detector, we analyze application prospect in railway infrared hotbox detection system. These new infrared detectors will be developed and improved in the next 3-5years, and then the level of production can be achieved.
{"title":"Notice of RetractionDevelopments trend of new infrared detectors domestic and abroad","authors":"Tieliu Wang, Shang-Xian Jin","doi":"10.1109/MACE.2011.5986896","DOIUrl":"https://doi.org/10.1109/MACE.2011.5986896","url":null,"abstract":"As one of the fastest growing detectors in recent years, infrared detectors are widely used in military and civil use, and play an irreplaceable role. By analysing and generalizing some of the relevant english literature of recent years, This article describes the development of a variety of new infrared detectors domestic and abroad, including Pb-salt array detector -. double-color/multicolor MCT (HgCdTe) detector, MCT array detector, planar linear array InGaAs detector and so on. Self-cooled , dark current correction of Pb-salt detectors; The developments of third generation MCT devices in array size -, double-color/multicolor, very long wavelength application of photovoltaic tech-nology , amplifier capability ; The current-voltage measurement of eight element planar linear array InGaAs detector , the difference between a peak response rate obtained through the signah noise, and the corresponding spectra and the theoretical values and etc were analyzed. According to the current development state of infrared detector, we analyze application prospect in railway infrared hotbox detection system. These new infrared detectors will be developed and improved in the next 3-5years, and then the level of production can be achieved.","PeriodicalId":6400,"journal":{"name":"2011 Second International Conference on Mechanic Automation and Control Engineering","volume":"4 1","pages":"207-210"},"PeriodicalIF":0.0,"publicationDate":"2011-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78417103","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 : 2011-07-15DOI: 10.1109/MACE.2011.5988698
Xiangping Chen, Jinhua Tan
Abstract: Full-scale Tests of steel truss bridge components are made to study the effect of paint, the inspectors and testing process on the results of fatigue crack detection, for the uncertainty and omission existing in measured flaw size. The POD (probability of detection) curve is provided for the flaw detection in steel-truss bridges, the reliability model obtaining initial flaw size is established, which takes the POD curve and inspection deviations into account, and the formula provided can be used to evaluate the initial flaw size when predicting the residual life of steel truss bridge applying damage tolerance method.
摘要针对钢桁架桥梁构件疲劳裂纹尺寸测量存在的不确定性和遗漏，进行了全尺寸试验，研究了涂料、检测手段和检测工艺对疲劳裂纹检测结果的影响。给出了钢桁架桥梁缺陷检测的POD (detection probability of detection)曲线，建立了考虑POD曲线和检测偏差的初始缺陷尺寸的可靠性模型，所提供的公式可用于损伤容限法预测钢桁架桥梁剩余寿命时对初始缺陷尺寸的评估。
{"title":"A study on the POD curve and initial crack size of steel truss bridge","authors":"Xiangping Chen, Jinhua Tan","doi":"10.1109/MACE.2011.5988698","DOIUrl":"https://doi.org/10.1109/MACE.2011.5988698","url":null,"abstract":"Abstract: Full-scale Tests of steel truss bridge components are made to study the effect of paint, the inspectors and testing process on the results of fatigue crack detection, for the uncertainty and omission existing in measured flaw size. The POD (probability of detection) curve is provided for the flaw detection in steel-truss bridges, the reliability model obtaining initial flaw size is established, which takes the POD curve and inspection deviations into account, and the formula provided can be used to evaluate the initial flaw size when predicting the residual life of steel truss bridge applying damage tolerance method.","PeriodicalId":6400,"journal":{"name":"2011 Second International Conference on Mechanic Automation and Control Engineering","volume":"103 1","pages":"7146-7149"},"PeriodicalIF":0.0,"publicationDate":"2011-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78435068","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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