摘要
将多柔体动力学方法引入到曲轴计算中,建立发动机曲轴轴系的动力学仿真模型,对曲轴轴系进行刚柔耦合多体运动学和动力学仿真,为下一步疲劳寿命计算提供可靠的载荷条件;然后,从曲轴所受的载荷中找出三个载荷比较大的时刻,计算得到其相应时刻的应力和应变分布规律,找出曲轴受力的危险部位,为曲轴的动态强度分析提供数据;最后,结合Ansys有限元分析软件和柯顿-多兰(Certon-Dolan)理论,估算连杆疲劳寿命,同时分析多级载荷加载次序对疲劳寿命的影响,为零部件的主动寿命设计提供参考数据和理论判据。
Introducing multi-flexib1e body dynamics to crankshaft computing,a dynamics simulation model of crank and link mechanism of an engine is built.Based on the rigid and flex coupled model,ADAMS(automatic dynamic analysis of mechanical systems) is used to do a kinematics and dynamic simulation to get dynamic loads.It also provides a reliable characteristic for the body vibration noise of next step.Then the bigger loads of three moments are identified from all loads.The distribution law of the stress and strain ...
出处
《机械强度》
CAS
CSCD
北大核心
2010年第6期1018-1021,共4页
Journal of Mechanical Strength
基金
船舶工业国防科技预研基金(07J2.3.2)~~
关键词
强度
疲劳寿命
动力学
曲轴轴系
Strength
Fatigue life
Dynamics
Crankshaft and link mechanism
