A CONTACT FORCE MODEL WITH HYSTERESIS DAMPING FOR IMPACT ANALYSIS OF MULTIBODY SYSTEMS
A CONTACT FORCE MODEL WITH HYSTERESIS DAMPING FOR IMPACT ANALYSIS OF MULTIBODY SYSTEMS
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DOI：
10.1115/1.2912617
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发表时间：
1990-09-01
影响因子：
3.3
通讯作者：
NIKRAVESH, PE
中科院分区：
文献类型：
--
作者：
LANKARANI, HM;NIKRAVESH, PE
提出了一种用于两粒子碰撞分析的连续接触力模型。该模型采用赫兹接触定律的一般趋势。模型中加入了一个迟滞阻尼函数，表示碰撞时的耗散能量。确定了模型中的参数，验证了模型的有效性。然后将该模型推广到多体系统两体之间的碰撞分析。使用多体系统的运动方程或等效的碰撞体的双粒子模型进行连续分析。对于后者，提出了有效质量的概念，以补偿系统中联合力的影响。为了说明，考虑了曲柄滑块与另一个滑块之间的碰撞情况。
A continuous contact force model for the impact analysis of a two-particle collision is presented. The model uses the general trend of the Hertz contact law. A hysteresis damping function is encorporated in the model which represents the dissipated energy in impact. The parameters in the model are determined, and the validity of the model is established. The model is then generalized to the impact analysis between two bodies of a multibody system. A continuous analysis is performed using the equations of motion of either the multibody system or an equivalent two-particle model of the colliding bodies. For the latter, the concept of effective mass is presented in order to compensate for the effects of joint forces in the system. For illustration, the impact situation between a slider-crank mechanism and another sliding block is considered.