双离合器自动变速器干式双离合器设计与分析
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摘要
双离合器自动变速器(Dual Clutch Transmission,DCT)是目前车辆变速器领域关注的焦点,研究双离合器自动变速器的关键技术,开发具有自主知识产权的双离合器自动变速器,掌握其核心技术,对促进我国汽车工业的发展与技术进步具有十分重要的现实意义。
本文以国家“863”计划资助项目“经济型轿车高性能自动变速器开发”为依托,针对双离合器自动变速器干式双离合器的关键技术,基于有限元计算技术,完成DCT干式双离合器系统的结构参数设计与性能分析,主要进行以下研究工作:
①以长安CV11型轿车为搭载平台,根据其传动系统性能参数确定干式双离合器的结构方案与总体尺寸,完成干式双离合器基本参数计算及扭转减振器和常开式离合器膜片弹簧的参数设计。
②基于有限元理论,对影响双离合器工作特性的主要零部件,花键毂、从动片、膜片弹簧等进行静力学强度分析,验证其结构设计是否满足强度要求,并为其疲劳寿命分析提供载荷条件。
③基于干式双离合器静力学分析结果,利用FE-safe高级疲劳分析软件对干式双离合器主要疲劳易损件,膜片弹簧、花键毂、从动片等零件进行疲劳强度分析,验证模块的疲劳寿命是否满足设计要求。
④基于Matlab/Simulink仿真平台建立DCT车辆起步系统动力学模型,制定干式双离合器起步控制策略,对DCT车辆在不同起步工况下的离合器滑摩功进行仿真计算,为干式双离合器热负荷特性分析提供边界条件。
⑤利用有限元分析软件ANSYS对干式双离合器在极限起步工况下的温度场分布、热应力场分布、热变形等特性进行仿真分析,完成对干式双离合器热负荷特性的合理性分析,验证结构设计的合理性。
Dual Clutch Transmission(DCT) is the focus of vehicle transmission field. The study of key technologies of DCT system, and the development of DCT with independent intellectual property right to mastering the key technologies, have great practical significance to promote the development and technological progress of automotive industry of china.
In this paper, the study of key technology of the DCT dual dry clutch is carried out relying on a project National High-tech R&D Program (863 Program)“Development of high performance automatic transmission for economical car”. Based on the finite element technology, completed the design and performance analysis of the dual dry clutch .The main works as follow:
①Based on Chang’an CV11 vehicle, the structure scheme and overall dimension of the dual dry clutch are confirmed according to the performance parameters of the power train. Basic parameters of the torsion damper and the diaphragm spring of normally released clutch were calculated in this paper.
②In order to validate whether the design of dual dry clutch meet the structural strength and also to provide load conditions for the fatigue life analysis, the static strenth analysis of the driven plate,driven disc and diaphragm spring which have a major impact on the performance of the dual dry clutch were implemented based on the finite element technology.
③Based on the results of the static strength analysis of dual dry clutch, fatigue analysis of the driven plate,driven disc and diaphragm spring which are the most easily damaged parts in the dual dry clutch system were implemented in the advanced fatigue analysis software FE-safe in order to validate whether the fatigue life of dual dry clutch meet the design requirement.
④A starting control strategy of dual dry clutch was proposed based on the analysis of DCT starting process. A DCT starting dynamic model with that strategy above was established and simulated in Matlab/Simulink. Friction work of the dual dry clutch in several starting condition was calculated in order to provide the boundary conditions for the thermal characteristics analysis of the dual dry clutch.
⑤In order to validate whether the thermal characteristics of the designed dual dry clutch meet the design requirement, the temperature field, thermal stress field and thermal deformation of the dual dry clutch in the extreme condition were simulated in the finite element analysis software ANSYS.
本文以国家“863”计划资助项目“经济型轿车高性能自动变速器开发”为依托,针对双离合器自动变速器干式双离合器的关键技术,基于有限元计算技术,完成DCT干式双离合器系统的结构参数设计与性能分析,主要进行以下研究工作:
①以长安CV11型轿车为搭载平台,根据其传动系统性能参数确定干式双离合器的结构方案与总体尺寸,完成干式双离合器基本参数计算及扭转减振器和常开式离合器膜片弹簧的参数设计。
②基于有限元理论,对影响双离合器工作特性的主要零部件,花键毂、从动片、膜片弹簧等进行静力学强度分析,验证其结构设计是否满足强度要求,并为其疲劳寿命分析提供载荷条件。
③基于干式双离合器静力学分析结果,利用FE-safe高级疲劳分析软件对干式双离合器主要疲劳易损件,膜片弹簧、花键毂、从动片等零件进行疲劳强度分析,验证模块的疲劳寿命是否满足设计要求。
④基于Matlab/Simulink仿真平台建立DCT车辆起步系统动力学模型,制定干式双离合器起步控制策略,对DCT车辆在不同起步工况下的离合器滑摩功进行仿真计算,为干式双离合器热负荷特性分析提供边界条件。
⑤利用有限元分析软件ANSYS对干式双离合器在极限起步工况下的温度场分布、热应力场分布、热变形等特性进行仿真分析,完成对干式双离合器热负荷特性的合理性分析,验证结构设计的合理性。
Dual Clutch Transmission(DCT) is the focus of vehicle transmission field. The study of key technologies of DCT system, and the development of DCT with independent intellectual property right to mastering the key technologies, have great practical significance to promote the development and technological progress of automotive industry of china.
In this paper, the study of key technology of the DCT dual dry clutch is carried out relying on a project National High-tech R&D Program (863 Program)“Development of high performance automatic transmission for economical car”. Based on the finite element technology, completed the design and performance analysis of the dual dry clutch .The main works as follow:
①Based on Chang’an CV11 vehicle, the structure scheme and overall dimension of the dual dry clutch are confirmed according to the performance parameters of the power train. Basic parameters of the torsion damper and the diaphragm spring of normally released clutch were calculated in this paper.
②In order to validate whether the design of dual dry clutch meet the structural strength and also to provide load conditions for the fatigue life analysis, the static strenth analysis of the driven plate,driven disc and diaphragm spring which have a major impact on the performance of the dual dry clutch were implemented based on the finite element technology.
③Based on the results of the static strength analysis of dual dry clutch, fatigue analysis of the driven plate,driven disc and diaphragm spring which are the most easily damaged parts in the dual dry clutch system were implemented in the advanced fatigue analysis software FE-safe in order to validate whether the fatigue life of dual dry clutch meet the design requirement.
④A starting control strategy of dual dry clutch was proposed based on the analysis of DCT starting process. A DCT starting dynamic model with that strategy above was established and simulated in Matlab/Simulink. Friction work of the dual dry clutch in several starting condition was calculated in order to provide the boundary conditions for the thermal characteristics analysis of the dual dry clutch.
⑤In order to validate whether the thermal characteristics of the designed dual dry clutch meet the design requirement, the temperature field, thermal stress field and thermal deformation of the dual dry clutch in the extreme condition were simulated in the finite element analysis software ANSYS.
引文
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[11]唐德江.双离合器式自动变速器的研究[D].长春:吉林大学, 2005.
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[14]吴光强,杨伟斌,秦大同.双离合器式自动变速器控制系统的关键技术[J].机械工程学报, 2007(43): 13-21.
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[17]徐石安.江发潮.汽车离合器[M].清华大学出版社, 2005.
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[20]杨橙.汽车离合器膜片弹簧的有限元分析[J].机电技术, 2005(1): 37-38.
[21]王助成,邵敏.有限单元法基本原理及数值方法[M].清华大学出版社, 1997.
[22]北京科技大学,东北大学.工程力学[M] .高等教育出版社, 1997.
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[28]江迎春,陈无畏.基于ANSYS的轿车转向节疲劳寿命分析[J].汽车科技. 2008, 3: 32-35.
[29]姜年朝. ANSYS和ANSYS/FE-SAFE软件的工程应用及实例[M].河海大学出版社, 2006.
[30]易太连,吴杰长,刁爱民等.基于有限元和FE-SAFE的柴油机排烟管振动下的疲劳寿命分析[J].内燃机工程. 2008, 29(3):76-80.
[31]王侃,屈福政.基于ANSYS/fe-safe的修造船用高空作业车伸缩臂疲劳寿命分析[J].现代设计与先进制造技术. 2008, 37(15):49-54.
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[33]潘艳春.离合器从动盘总成疲劳寿命的提高[J].汽车工艺与材料. 2004, 7:10-12.
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[35]程汉应.膜片弹簧的应力分析和疲劳寿命的计算[J].机械研究与应用. 2000, 13(4):33-39.
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