The paper studies the effect of elastic preloading constraints on structural dynamics of large space deployable structures with joint alearances. Based on the axial tension model, a 3D beam element of the axial tension joint was constructed. Then, considering the nonlinear mechanical behavior of the elastic pretensioned joint, the dynamic equations of the full structure were established based on KelvinVoigt contact model and Coulomb friction model. The influence of preload force on the structural vibrations was analyzed. The results showed that under the nonlinear joint constraints, the vibration transmission at high frequency increases, and the energy of low-order modes is transferred to the higherorder ones.
陈金,金栋平.弹性预紧约束非线性对结构振动的影响[J].动力学与控制学报,2020,18(2):69~75; Chen Jin, Jin Dongping. Effect of nonlinear elastic preload on vibration of structures[J]. Journal of Dynamics and Control,2020,18(2):69-75.复制