【摘要】 以一个简单的刚弹耦合多体动力学系统为例,提出了一种利用系统模态参数识别系统物理参数的新方法。利用多体系统增广特征矢量的正交性条件,可建立以系统物理参数为未知数的代数方程组。给出了通过系统模态参数识别物理参数的计算步骤。算例与计算结果表明:用该方法能有效识别刚弹耦合多体系统的物理参数,具有计算精度高、计算量小、所需参数少等特点。更多还原

【Abstract】 Taking a simple multibody system coupled with rigid and elastic bodies for example, a new method for identifying structure parameter of coupled flexible-rigid multibody system dynamics is presented. By using the orthogonality condition of augmented eigenvector of multibody system, the algebraic equation group with unknowns of structure parameter is formed. The computational steps of identifying structure parameter from modal parameters are given. Examples and computational results show that the new method identifies the structure parameters of multibody system coupled with rigid and elastic bodies. The method has higher computational precision with limited computational work and needs less modal parameters.更多还原