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研究了卫星包带连接的有限元力学建模。基于对包带预紧力、卡块与连接环间的接触力,以及两连接环间的接触力的分析,将接触力等效为有限单元节点力。对所建模型中的非线性项,用Newton-Raphson法求得给定包带预紧力的平衡位置,再以该平衡位置处的切线刚度对模型作线性化,分析了模态和固有频率等动力学特性。某卫星的算例验证了模型的正确性。
The finite element mechanics modeling of satellite strap connection is studied. The contact force is equivalent to the finite element nodal force based on the analysis of the pre-tightening force of the tape, the contact force between the block and the connecting ring and the contact force between the two connecting rings. For the nonlinear term in the model, the equilibrium position of the pre-tensioning force of the pre-tensioning belt was obtained by Newton-Raphson method. The linearity of the model was linearized by the tangential stiffness at the equilibrium position. The modal and natural frequency Other dynamic characteristics. An example of a satellite verifies the correctness of the model.