摘要
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。
To study the deployable unit body of the satellite antenna as a target, by using relationship between the contact-impactmechanics of the gap between the simulation of nonlinear spring and damping hinge, and using second-order interpolation linear combi- nation of basis functions to describe the bending elastic deformation of rod. To build the modeling of unit body＇s rigid-flexible coupling dynamics, and to study the joint clearance and component flexibil- ity＇s effect on the satellite antenna deployable unit body＇s dynamic characteristics. The results show that both the joint clearance and component flexibility can lead to impact force which generated sig-nifieant local fluctuations. Moreover, rigid-flexible coupling model- ing collision force＇s fluctuation amplitude increased a few times than the rigid modeling collision force. The research laid the foundation of dynamic optimization design of the deployable structures.
出处
《机械设计》
CSCD
北大核心
2013年第5期25-28,共4页
Journal of Machine Design
基金
国家自然科学基金资助项目(51175422)
关键词
可展结构
单元机构
动力学
组合机构
刚柔耦合
deployable structure
unit mechanism
dynam-ics
combination mechanism
rigid-flexible coupling
作者简介
陈苏（1989-），男，陕西凤翔人，硕士研究生，专业方向：机械设计。
