基于接触理论的空间光学遥感器的动力学求解

遥感器结构中通过螺钉或销钉的非线性连接环节的存在使得准确求解动态刚度的困难加大，在介绍的经典接触理论的基础上，根据结构形式，材料和施加的预警力通过计算机模拟分析出连接部分接触面间的实际接触状态，在建立动力学有限元分析模型时，通过接触单元和螺钉单元模拟接触区域的刚度特性，获得系统的固有频率和振型，有限元分析结果与正弦招聘描试验时的结果基本一致（误差给为4％），表明这种方法能够较好地模拟出结构的动态刚度，相关分析还表明，只有通过分析接触等非线性环节，才能模拟出结构的真实动态刚度。

Dynamic solving of a space optical sensor based on contact theory

The dynamic solving of complex structures by computer simulation plays an important role in obtaining their structural natural frequencies and guiding their design, optimization and testing. Using the classical contact theory, the contact states were analyzed for contacting components in a space optical imaging sensor, with a finite element model. Vibration tests carried out indicated that the calculated frequencies were in good agreement with those obtained from tests, the structural dynamic stiffness was better simulateds and the true dynamic stiffness can be obtained through contact non linear analysis only.