计及动力刚化的柔体动力学

• 作 者: 刘又午 阎绍泽 张大钧
• 机 构: 天津大学机械工程系!天津市,300072,天津大学!天津市,300072,天津大学!天津市,300072
• 出 处: 中国机械工程
• 发表日期: 1997年04期
• 关键词: 柔性体 有限段方法 几何非线性 广义坐标 力学建模 梁式结构 机械构件 柔性构件 系统动力学分析 运动规律

提出两种计及动力刚化影响的动力学建模方法：有限段方法和一致线性化动力学方法。分析了这两种动力学方法计及动力刚化的机理，有限段方法将柔体动力学问题转化为带有关节柔性的多刚体系统动力学问题，计及了几何非线性的影响，适合于解决梁式结构的动力学问题；一致线性化动力学方法将变形场描述成为变形广义坐标的非线性形式，在适当的阶段线性化，可得到一致线性化动力学方程，自然计及了动力刚化项．适合子柔体的小变形问题。

Two kinetic modeling methods that take into account the impact of dynamic stiffening are proposed: the finite-section method and the uniform linearized dynamic method. The dynamic mechanics of the rigid body is analyzed by these two dynamic methods. The finite-section method transforms the flexible body dynamics problem into the dynamic problem of multi-rigid body system with joint flexibility, and takes into account the influence of geometric nonlinearity, which is suitable for To solve the dynamic problem of the beam structure. The uniform linear dynamic method describes the deformation field as the nonlinear form of the generalized deformation of the deformation, and at the appropriate stage of linearization, the uniform linear dynamic equation can be obtained. Item. Suitable for small deformation of soft body problems.