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Dynamics modeling of the elastic beam undergoing large overall motion considering coupling effect in deformation
Author(s): 
Pages: 599-605
Year: Issue:  5
Journal: CHINESE JOURNAL OF COMPUTATIONAL MECHANICS

Keyword:  柔性梁耦合非线性弹性旋转矩阵;
Abstract: 柔性梁在作大范围空间运动时,产生弯曲和扭转变形,这些变形的相互耦合形成了梁在纵向以及横向位移的二次耦合变量.本文考虑了变形产生的几何非线性效应对运动柔性梁的影响,在其三个方向的变形中均考虑了二次耦合变量,利用弹性旋转矩阵建立了准确的几何非线性交形方程,通过Lagrange方程导出系统的动力学方程.仿真结果表明,在大范围运动情况下,仅在纵向变形中计及了变形二次耦合量的一次动力学模型,与考虑了完全几何非线性变形的模型具有一定的差异.
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