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引入非线性变形场描述，建立了基于小变形的柔性多体系统动力学模型，解决了传统动力学建模方法存在的对变形广义坐标过早线性化的缺陷．对旋转梁式构件进行了动力学仿真，仿真结果表明传统方法不适合用于高速旋转的柔性体动力学建模．本文提出的动力学建模方法为解决实际工程中各种复杂结构动力学分析提供了有力工具
The nonlinear deformation field description is introduced to establish a flexible multi-body system dynamics model based on small deformation, which solves the defects of traditional linear dynamic modeling method that premature linearization of deformation generalized coordinates. The dynamic simulation of the rotating beam is carried out. The simulation results show that the traditional method is not suitable for flexible body dynamics modeling at high speed. The proposed dynamic modeling method provides a powerful tool for solving the dynamic analysis of complex structures in practical engineering