摘要：针对惯性平台内框架失稳倒台这一故障，基于 接触力模型建立内框架组件倒台时的动力学模型，全面分析了倒台时内框架与挡块的碰撞力变化过程。之后使用Ansys Workbench仿真软件，建立并分析平台内框架失稳倒台的动力学模型。计算出在倒台过程中挡块的应力分布云图。将两者相比较，证明了所建立的动力学模型以及各项分析的正确性，为后续的平台设计提供了重要的参考。

Abstract: Faceing inner gimbal component of inertial platform running away because of mis-stability, It establishes inner gimbal dynamic model by Hertz contact model. The process of impact force between inner gimbal and obstructive block has been knew. And then the Ansys Workbench is used to work out the stress of obstructive block. The result of simulation by Ansys Workbench and dynamic model are compared to prove the dynamic model is correct. This result will provide importance reference for the future design of inertial platform.