Dynamic modeling of flexible multibody systems with parameter uncertainty

Dynamic modeling of flexible multibody systems with parameter uncertainty
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参数不确定的柔性多体系统动态建模

DOI:
10.1016/j.chaos.2006.06.091
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发表时间:
2008-05
影响因子:
7.8
通讯作者:
Wang, Shu-Xin
Wang, Shu-Xin
中科院分区:
数学1区
文献类型:
--
作者:
Wang, Yan-Hui;He, Bai-Yan;Wang, Shu-Xin

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由于参数的不确定性,实际多体系统的动态模型可能会不准确。这些参数的不确定性是由接头间隙、摩擦、润滑、材料不均匀性以及制造和装配误差等因素引起的。本文开发了一个模型,用于确定模型参数的随机行为对系统动态响应的影响。在所提出的方法中,假设变形仍然很小,因此可以获得具有“动态刚化项”的柔性多体系统动力学的线性化方程。利用所开发的控制方程,蒙特卡罗方法和摄动方法成功地模拟了具有参数不确定性的多体系统。使用柔性梁的示例来演示该方法。
Dynamic models of practical multibody systems may have inaccuracies which are due to parameter uncertainties. These parameter uncertainties are caused by factors such as joint clearances, friction, lubrication, material non-uniformities and manufacturing and assembly errors. In this paper, a model for the determination of the impact of the stochastic behavior of model parameters on the dynamic response of a system is developed. In the method presented, it is assumed that deformations remain small, so that linearized equations for the dynamics of the flexible multibody systems with “dynamic stiffening terms” could be obtained. The Monte-Carlo method and the perturbation method are successfully used to simulate multibody systems with parameter uncertainties using the governing equations developed. An example of a flexible beam is used to demonstrate the method.
DOI: 10.1080/08905459508905245
发表时间: 1995
期刊: Mechanics of Structures and Machines
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