飞行器对接框接触界面的等效模型及刚度特性

发布时间：2017-12-31 04:26

  本文关键词：飞行器对接框接触界面的等效模型及刚度特性　出处：《机械设计与研究》2016年02期 　论文类型：期刊论文

  更多相关文章： 空间对接框 双弹簧模型 Hertz接触理论 接触刚度 变载荷

【摘要】：针对空间飞行器对接框结构工作时拉压载荷特点,采用周向双弹簧等效接触模型进行对接框接触界面刚度等效,建立对接框结构在压力载荷和弯矩载荷作用下结构的接触界面刚度计算解析模型。基于弹性力学和Hertz及分形理论分别推导了对接框锁钩与接触面等效弹簧刚度,研究了变载荷作用下对接框接触界面刚度的变化特性,并利用对接试验平台对刚度模型进行了验证。结果表明:对接框在受压力载荷时刚度随载荷非连续增加,在载荷与预紧力相等时接触界面刚度发生突变;弯矩载荷时刚度随载荷的增加而接近于线性增大。该结果可为空间飞行器动力学特性分析中接触界面刚度等效提供参考。
[Abstract]:According to the characteristics of tension and compression load on the docking frame structure of space vehicle, the contact interface stiffness of the docking frame is equivalent by using the circumferential double spring equivalent contact model. An analytical model for calculating the contact interface stiffness of a docked frame structure under pressure and bending moment loads is established. Based on elastic mechanics, Hertz and fractal theory, the equivalent projectile between the hook and the contact surface of the docking frame is derived, respectively. Spring stiffness. The change characteristics of the contact interface stiffness of the docking frame under variable load are studied, and the stiffness model is verified by using the docking test platform. The results show that the stiffness of the docking frame increases with the load discontinuous under the pressure load. When the load is equal to the pretightening force, the contact interface stiffness changes. The stiffness increases linearly with the increase of the load, and the results can provide a reference for the equivalent stiffness of the contact interface in the analysis of the dynamic characteristics of the spacecraft.
【作者单位】： 上海交通大学上海市复杂薄板结构数字化制造重点实验室;上海宇航系统工程研究所;
【基金】：国家自然科学基金资助项目(51275292)
【分类号】：V414
【正文快照】： 飞行器对接框型结构主要是实现主被动飞行器的对接,同时也在飞行过程中保证两飞行器的连接与密封。在变轨过程中由于载荷突变和接触界面之间的刚度变化引起结构变形的不可预测性,而飞行器尺寸和速度很大,微小的变形会引起整个飞行器的位姿发生变化,因此研究接触界面的刚度等效，

本文编号：1358121