【摘 要】
：
为在柔性多体系统动力学中引入固定界面动态子结构法 ,将 Craig固定界面法减缩后的系统经过再次坐标变换 ,分离出刚体模态 ,证明能更明确地表达边界影响 ,可以进一步提高减缩
【机 构】
：
清华大学精密仪器与机械学系,清华大学精密仪器与机械学系,清华大学精密仪器与机械学系,清华大学精密仪器与机械学系 北京100084,北京100084,北京100084,北京100084
论文部分内容阅读
为在柔性多体系统动力学中引入固定界面动态子结构法 ,将 Craig固定界面法减缩后的系统经过再次坐标变换 ,分离出刚体模态 ,证明能更明确地表达边界影响 ,可以进一步提高减缩效率 ,便于在多体动力学中使用 ,并给出了一个含弹性连杆的曲柄滑块机构算例。分析和计算表明 ,经过了再次坐标变换后提高了减缩效率 ,在一定情况下 ,边界状况对系统影响显著 ,使用表达边界的模态可以提高多体动力学的数值仿真精度
In order to introduce the dynamic substructure method of fixed multi-body system into the dynamics of flexible multi-body system, the system with Craig interface method reduction is again coordinate transformed to separate the rigid body mode, which proves that the boundary effect can be more clearly expressed and the reduction can be further enhanced Efficiency, easy to use in multi-body dynamics and gives an example of a crank-slider mechanism with an elastic connecting rod. The analysis and calculation show that after the coordinate transformation again, the reduction efficiency is improved. Under some circumstances, the boundary condition has a significant impact on the system. Using the expression boundary modal can improve the numerical simulation accuracy of multi-body dynamics
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