柔性多体系统, 绝对节点坐标, 多项式混沌, 随机响应面方法

A parametrical uncertainty analysis of flexible multibody systems was presented. The deformations of flexible parts were modeled using ANCF. Polynomial chaos methods were employed to solve ANCF-based flexible multibody systems with random variables. Theoretical analysis and numerical examples were made to compare the accuracy and efficiency of polynomial chaos methods and Monte Carlo simulation method. Results show that polynomial chaos methods are more effective than Monte Carlo simulation to achieve the same accuracy in solving complex flexible multibody systems. 

flexible multibody system, absolute nodal coordinate formulation(ANCF), polynomial chaos, stochastic response surface method(SRSM)