摘要
本文提出了一种在汽车抗碰撞分析中计及摩擦力的计算方法。这是一种假定服从库仑摩擦定律的计算摩擦力的有限元分析显式计算法,称为“防御节点法”。很多情况,包括物体间接触碰撞的大变形、大位移,以及碰撞接触面上大的相对滑动等情况都可应用此法进行计算。同时,在此法中还可应用拉格朗日乘子来表征粘滞状态并进行显式的动力学分析。数值分析的结果证明本方法是有效的和可靠的。
An algorithm for evaluation of friction in automobile crashworthiness analysis is described. The algorithm is based on an explicit finite dement method with the Coulomb's friction law assumed. The defence node algorithm is used such that the sticking condition can be imposed with the Lagrange multiplier method even in the explicit dynamic analysis. The algorithm is supposed to be applicable to many general situations, including large deformations of the contact-impact bodies and large relative slidings between the contact-impact boundaries. Numerical results are presented to demonstrate the performance of the algorithm.
出处
《汽车工程》
EI
CSCD
北大核心
1993年第6期329-334,共6页
Automotive Engineering
关键词
汽车
抗碰撞性
摩擦力
计算
Automobile crashworthiness Defence node algorithm Friction force Calculation
