计及应力刚化效应的空间大运动曲梁动力学建模与分析
发布时间：2018-10-17 14:17
【摘要】：从连续介质力学非线性位移-应变关系出发,导出计入应力刚化效应的空间柔性梁变形能表达式。利用浮动框架有限元方法和哈密顿变分原理推导了满足小变形假设的空间曲梁的一般运动动力学方程,并利用模态缩减法对动力学方程进行了维数降阶。所推导的动力学方程可用于高速旋转一般运动空间柔性曲梁动力学问题的求解。通过数值仿真讨论了应力刚化效应对大范围运动小变形空间柔性曲梁动力学特性的影响,并与ADAMS软件和ABAQUS软件的仿真结果进行了对比,指出了ADAMS软件在高速旋转柔性多体系统数值计算方面的一些缺陷。所提出的计及应力刚化效应的空间曲梁动力学建模方法为高速旋转一般运动柔性多体系统动力学建模和分析提供了参考。
[Abstract]:Based on the nonlinear displacement-strain relationship in continuum mechanics, the deformation energy expression of spatial flexible beam with stress hardening effect is derived. By using the finite element method of floating frame and Hamiltonian variational principle, the general dynamic equations of space curved beams satisfying the assumption of small deformation are derived, and the dimension of the dynamic equations is reduced by modal reduction method. The derived dynamic equations can be used to solve the dynamic problems of flexible curved beams in general space of high speed rotation. The effect of stress stiffening on the dynamic characteristics of flexible curved beams in large motion and small deformation space is discussed by numerical simulation. The results are compared with the simulation results of ADAMS and ABAQUS software. Some defects of ADAMS software in numerical calculation of flexible multibody system with high speed rotation are pointed out. The dynamic modeling method of space curved beam considering stress stiffening effect provides a reference for dynamic modeling and analysis of flexible multi-body system with high speed rotation.
【作者单位】： 南京理工大学发射动力学研究所;
【基金】：国家自然科学基金(11102089) 江苏省研究生培养创新计划基金(CXZZ12_0177)资助
【分类号】：O313.7
本文编号：2276946
[Abstract]:Based on the nonlinear displacement-strain relationship in continuum mechanics, the deformation energy expression of spatial flexible beam with stress hardening effect is derived. By using the finite element method of floating frame and Hamiltonian variational principle, the general dynamic equations of space curved beams satisfying the assumption of small deformation are derived, and the dimension of the dynamic equations is reduced by modal reduction method. The derived dynamic equations can be used to solve the dynamic problems of flexible curved beams in general space of high speed rotation. The effect of stress stiffening on the dynamic characteristics of flexible curved beams in large motion and small deformation space is discussed by numerical simulation. The results are compared with the simulation results of ADAMS and ABAQUS software. Some defects of ADAMS software in numerical calculation of flexible multibody system with high speed rotation are pointed out. The dynamic modeling method of space curved beam considering stress stiffening effect provides a reference for dynamic modeling and analysis of flexible multi-body system with high speed rotation.
【作者单位】： 南京理工大学发射动力学研究所;
【基金】：国家自然科学基金(11102089) 江苏省研究生培养创新计划基金(CXZZ12_0177)资助
【分类号】：O313.7
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