In the non-road vehicle transmission systems, it always has early damage in the input shaft bearing. Gearbox simulation model is established by Romax software. Based on the different load spectrum of all shaft bearings and Adjusted bearing damage rate prediction method (instead of ISO 281), rolling bearings are simulated and compared with the actual useful state of those bearings, the results shows that early fretting wear and failure appear on the inner raceway of both input shaft bearings that are connected to engine flywheel due to the vibration of flywheel, input shaft bend, etc. After further study on this failure, the fretting wear mechanism model of input shaft bearing is proposed so that it provides a theoretical reference for the assessment and design of bearings on damage rate of Adjusted method.
{"title":"Early Failure Study of Gearbox Input Shaft Bearing on Damage Rate","authors":"Z. Liu, Zhiyuan Li, Yongguo Wang, Guang Xia","doi":"10.2991/EMEIT.2012.438","DOIUrl":"https://doi.org/10.2991/EMEIT.2012.438","url":null,"abstract":"In the non-road vehicle transmission systems, it always has early damage in the input shaft bearing. Gearbox simulation model is established by Romax software. Based on the different load spectrum of all shaft bearings and Adjusted bearing damage rate prediction method (instead of ISO 281), rolling bearings are simulated and compared with the actual useful state of those bearings, the results shows that early fretting wear and failure appear on the inner raceway of both input shaft bearings that are connected to engine flywheel due to the vibration of flywheel, input shaft bend, etc. After further study on this failure, the fretting wear mechanism model of input shaft bearing is proposed so that it provides a theoretical reference for the assessment and design of bearings on damage rate of Adjusted method.","PeriodicalId":221663,"journal":{"name":"International Conference on Electronic and Mechanical Engineering and Information Technology","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133146854","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}
Pulse generator is the key equipment of electrical discharge machining (EDM). Considering the disadvantage of the traditional EDM pulse generator, a new pulse generator based on VB and SCM is designed. The simulation and serial communication with SCM are achieved, and the pulse width, pulse period, and phase sequence difference can be adjusted by the upper computer at a wide range. The simulation experiment results show that the pulse parameter can be adjusted conveniently, and the effects of the pulse parameter on the process performance can be understood easily.
{"title":"Experimental design of EDM pulse generator based on VB and SCM","authors":"R. Ji, Yonghong Liu, Xiaopeng Li, Xin Dong","doi":"10.2991/EMEIT.2012.231","DOIUrl":"https://doi.org/10.2991/EMEIT.2012.231","url":null,"abstract":"Pulse generator is the key equipment of electrical discharge machining (EDM). Considering the disadvantage of the traditional EDM pulse generator, a new pulse generator based on VB and SCM is designed. The simulation and serial communication with SCM are achieved, and the pulse width, pulse period, and phase sequence difference can be adjusted by the upper computer at a wide range. The simulation experiment results show that the pulse parameter can be adjusted conveniently, and the effects of the pulse parameter on the process performance can be understood easily.","PeriodicalId":221663,"journal":{"name":"International Conference on Electronic and Mechanical Engineering and Information Technology","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132514156","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 constitutive relation such as shear strength and optimal anchoring angle of jointed rock masses are obtained by analyzing the bolt grouting mechanism of mine fracture rock masses. The rock roadway of double-track roadway is simulated respectively by Flac3D software under the condition of no-support and bolting and grouting. The simulation results show that the support with bolting and grouting enhances the bearing capacity of jointed roadway, improves the stress station, and limits the deformation of the jointed roadway rock.
{"title":"Study on Numerical Simulation and Bolt Grouting Mechanism of Mine Fracture rock masses","authors":"Yanli Liu, Zhiqiang Kang, Qingshan Li, Shuqiang Chen","doi":"10.2991/EMEIT.2012.114","DOIUrl":"https://doi.org/10.2991/EMEIT.2012.114","url":null,"abstract":"The constitutive relation such as shear strength and optimal anchoring angle of jointed rock masses are obtained by analyzing the bolt grouting mechanism of mine fracture rock masses. The rock roadway of double-track roadway is simulated respectively by Flac3D software under the condition of no-support and bolting and grouting. The simulation results show that the support with bolting and grouting enhances the bearing capacity of jointed roadway, improves the stress station, and limits the deformation of the jointed roadway rock.","PeriodicalId":221663,"journal":{"name":"International Conference on Electronic and Mechanical Engineering and Information Technology","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131705871","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 mainly addresses design of retracting mechanism based on amphibious vehicle's low speed and strong resistance in water. Through analyzing problems faced in the design of amphibious vehicle, one kind of retracting mechanism based on double-wishbone independent suspension is proposed. The equations of key-points at suspension guiding mechanism are obtained, and the relationship between the length of hydraulic stick retracted and the height of wheel lifted are also calculated. Finally, a specific 3D model is built, and wheel alignment is determined, therefore a real mechanism is assembled to illustrate the retracting mechanism.
{"title":"Design of Retracting Wheel Mechanism for Amphibious Vehicle and Motion Analysis","authors":"Huan Chen, Lijie Zhao, Yan Li","doi":"10.2991/EMEIT.2012.400","DOIUrl":"https://doi.org/10.2991/EMEIT.2012.400","url":null,"abstract":"This paper mainly addresses design of retracting mechanism based on amphibious vehicle's low speed and strong resistance in water. Through analyzing problems faced in the design of amphibious vehicle, one kind of retracting mechanism based on double-wishbone independent suspension is proposed. The equations of key-points at suspension guiding mechanism are obtained, and the relationship between the length of hydraulic stick retracted and the height of wheel lifted are also calculated. Finally, a specific 3D model is built, and wheel alignment is determined, therefore a real mechanism is assembled to illustrate the retracting mechanism.","PeriodicalId":221663,"journal":{"name":"International Conference on Electronic and Mechanical Engineering and Information Technology","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134636912","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}
Lamps with about 20W/m2 UV emission were made in our work. The lamp was fabricated by ITO glass and bonded aluminum with porous alumina on the surface. The working gas is the mixture of argon and Nitrogen. Lamps properties were investigated.
{"title":"Flat Panel Ultrovilet Lamps by vehicle of Porous Alumina and ITO glass","authors":"Jian Li, Kun Wang, S. Wang","doi":"10.2991/EMEIT.2012.223","DOIUrl":"https://doi.org/10.2991/EMEIT.2012.223","url":null,"abstract":"Lamps with about 20W/m2 UV emission were made in our work. The lamp was fabricated by ITO glass and bonded aluminum with porous alumina on the surface. The working gas is the mixture of argon and Nitrogen. Lamps properties were investigated.","PeriodicalId":221663,"journal":{"name":"International Conference on Electronic and Mechanical Engineering and Information Technology","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133220468","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}
During tumor thrombus formation in the cell disease or malignant cancer cell adhesion,it can impact to the invasion of the blood flow around,and Discusses the drug molecules into the tumor tissue, in the law of non-equilibrium diffusion process to identify drug molecules, and tumor tissue of the collision, Find the distribution function of tumor thrombus, to predict the tumor growth, doubling the situation.
{"title":"study on Calculation method of Adhesion of cancer cells with Tumor thrombus","authors":"Guilin Lu, Shaohong Wang, Y. Cao","doi":"10.2991/EMEIT.2012.419","DOIUrl":"https://doi.org/10.2991/EMEIT.2012.419","url":null,"abstract":"During tumor thrombus formation in the cell disease or malignant cancer cell adhesion,it can impact to the invasion of the blood flow around,and Discusses the drug molecules into the tumor tissue, in the law of non-equilibrium diffusion process to identify drug molecules, and tumor tissue of the collision, Find the distribution function of tumor thrombus, to predict the tumor growth, doubling the situation.","PeriodicalId":221663,"journal":{"name":"International Conference on Electronic and Mechanical Engineering and Information Technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131974211","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}
Significant predictability is found in medium-range weather systems over East Asia, particularly in those convective hazard weather events bringing numerous obstacles to the transportation and infrastructures. Based on a most advanced global numerical model product, we developed a real-time warning system to provide medium-range (5-15 days) forecast on danger events. The forecast is probabilistic to help the decision makers do gain/lost estimation. In 2007 and 2008 three flooding events on the Brahmaputra River were well predicted 10 days in advance. The medium-range genesis forecast skill of typhoon, a relative small-scale but much destructive weather system, is explored on examples of Megi and Doksuri. For both typhoons the maximum winds and minimum center pressure are well predicted as well as the tracks. The forecast bias might be due to the global model's resolution limit or the missing of statistical rendering.
{"title":"Extended probabilistic Typhoon forecast in South China Sea and operational weather forecast via satellite communication","authors":"J. Jian, J. Webster","doi":"10.2991/EMEIT.2012.374","DOIUrl":"https://doi.org/10.2991/EMEIT.2012.374","url":null,"abstract":"Significant predictability is found in medium-range weather systems over East Asia, particularly in those convective hazard weather events bringing numerous obstacles to the transportation and infrastructures. Based on a most advanced global numerical model product, we developed a real-time warning system to provide medium-range (5-15 days) forecast on danger events. The forecast is probabilistic to help the decision makers do gain/lost estimation. In 2007 and 2008 three flooding events on the Brahmaputra River were well predicted 10 days in advance. The medium-range genesis forecast skill of typhoon, a relative small-scale but much destructive weather system, is explored on examples of Megi and Doksuri. For both typhoons the maximum winds and minimum center pressure are well predicted as well as the tracks. The forecast bias might be due to the global model's resolution limit or the missing of statistical rendering.","PeriodicalId":221663,"journal":{"name":"International Conference on Electronic and Mechanical Engineering and Information Technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131974406","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}
A numerical analysis was performed, using three-dimensional finite element method to assess the impact of residual stress relaxation on the fatigue strength benefit of cold expansion. Fatigue lives of cold expansion hole made from aluminium alloy 7050-T7451 under different relaxation time are presented, the results reveal that the fatigue life enhancing ratio is inversely proportional to the stress relaxation time, residual stress relaxation can weaken the benefit of cold expansion strongly.
{"title":"The Impact of Residual Stress Relaxation on Fatigue Life Enhancing Effect of Cold Expansion","authors":"Di Guan, Qin Sun","doi":"10.2991/EMEIT.2012.492","DOIUrl":"https://doi.org/10.2991/EMEIT.2012.492","url":null,"abstract":"A numerical analysis was performed, using three-dimensional finite element method to assess the impact of residual stress relaxation on the fatigue strength benefit of cold expansion. Fatigue lives of cold expansion hole made from aluminium alloy 7050-T7451 under different relaxation time are presented, the results reveal that the fatigue life enhancing ratio is inversely proportional to the stress relaxation time, residual stress relaxation can weaken the benefit of cold expansion strongly.","PeriodicalId":221663,"journal":{"name":"International Conference on Electronic and Mechanical Engineering and Information Technology","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133284241","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 : 2011-09-19DOI: 10.1109/EMEIT.2011.6023133
Q. Xia, Ziping Liu, H. Lei, Jianhui Zhang
A novel valve-less piezoelectric pump with zigzag chamber bottom (ZCB) is presented. The chamber bottom of the pump is designed as a waves shape. The ZCB and the opposite piezoelectric vibrator constitute a series of zigzag ducts in the chamber. Different flow resistances are produced between the suction stroke and the discharge stroke of the pump. The different flow resistances will generate net flow when the pump works. The presented pump is successful to minimize the valve-less piezoelectric pump by eliminating the regular diffuse/nozzle elements outside the chamber. The theory on the pump working is analyzed. The flow field in chamber is simulated for an intuition. Finally, to verify the theory, a group of tests are performed, in which one angle is fixed at the valve of 90 degree, and another angle varies from 20 degree to 60 degree. The errors between tests and theoretical calculations are no more than 14.8%.
{"title":"Theoretical analysis and experimental varification on valve-less piezoelectric pump with zigzag chamber bottom","authors":"Q. Xia, Ziping Liu, H. Lei, Jianhui Zhang","doi":"10.1109/EMEIT.2011.6023133","DOIUrl":"https://doi.org/10.1109/EMEIT.2011.6023133","url":null,"abstract":"A novel valve-less piezoelectric pump with zigzag chamber bottom (ZCB) is presented. The chamber bottom of the pump is designed as a waves shape. The ZCB and the opposite piezoelectric vibrator constitute a series of zigzag ducts in the chamber. Different flow resistances are produced between the suction stroke and the discharge stroke of the pump. The different flow resistances will generate net flow when the pump works. The presented pump is successful to minimize the valve-less piezoelectric pump by eliminating the regular diffuse/nozzle elements outside the chamber. The theory on the pump working is analyzed. The flow field in chamber is simulated for an intuition. Finally, to verify the theory, a group of tests are performed, in which one angle is fixed at the valve of 90 degree, and another angle varies from 20 degree to 60 degree. The errors between tests and theoretical calculations are no more than 14.8%.","PeriodicalId":221663,"journal":{"name":"International Conference on Electronic and Mechanical Engineering and Information Technology","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116913428","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 : 2011-09-19DOI: 10.1109/EMEIT.2011.6023545
Gong Hao, Wang Zhanxue
An overall performance simulation model of the intercooled recuperative aero-engine was built, and an overall performance simulation program was developed. Then, analysis of the effects of intercooling and recuperation on the thermodynamic cycle parameters and performance parameters of the turbofan engine can be carried out. The result indicates that the turbofan engine performance can be improved with the proper use of intercooling and recuperation. With the same thermodynamic cycle parameters, the thermal efficiency and the net thrust is larger, while the specific fuel consumption is lower. To gain the same performance, lower overall pressure ratio and lower bypass ratio can be chosen for the intercooled recuperative aero-engine.
{"title":"Effects of intercooling and recuperation on turbofan engine performance","authors":"Gong Hao, Wang Zhanxue","doi":"10.1109/EMEIT.2011.6023545","DOIUrl":"https://doi.org/10.1109/EMEIT.2011.6023545","url":null,"abstract":"An overall performance simulation model of the intercooled recuperative aero-engine was built, and an overall performance simulation program was developed. Then, analysis of the effects of intercooling and recuperation on the thermodynamic cycle parameters and performance parameters of the turbofan engine can be carried out. The result indicates that the turbofan engine performance can be improved with the proper use of intercooling and recuperation. With the same thermodynamic cycle parameters, the thermal efficiency and the net thrust is larger, while the specific fuel consumption is lower. To gain the same performance, lower overall pressure ratio and lower bypass ratio can be chosen for the intercooled recuperative aero-engine.","PeriodicalId":221663,"journal":{"name":"International Conference on Electronic and Mechanical Engineering and Information Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129868280","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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