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以某卫星天线的可展单元机构为对象,采用非线性弹簧与阻尼模拟铰链间隙处的接触碰撞力学关系,并采用2阶插值基函数的线性组合描述杆的弯曲弹性变形,建立了单元机构的刚柔耦合动力学模型,研究运动副间隙及构件柔性对卫星天线可展单元机构的动力学特性的影响。分析结果表明,运动副处的间隙和构件的柔性都会导致碰撞力产生明显的局部波动,且刚柔耦合模型比刚性模型碰撞力的波动幅值增大了数倍。研究工作对可展机构的动态优化设计奠定了基础。
Taking the developable unit mechanism of a satellite antenna as an object, the contact-collision mechanics relation between the non-linear spring and the damping simulation hinge gap was introduced and the bending elastic deformation of the rod was described by the linear combination of the second-order interpolation basis functions. Rigid-Flexible Coupling Dynamics Model to study the influence of the motion gap and the component flexibility on the dynamic characteristics of the deployable satellite antenna. The analysis results show that the gap of the deputy and the flexibility of the members will lead to obvious local fluctuations of the impact force, and the amplitude of the fluctuation of the rigid-flexible coupling model is several times larger than that of the rigid model. The research laid the foundation for the dynamic optimization design of the exhibition organization.