【摘要】 中国空间站(以下简称空间站)大量科学仪器设备需要松不脱螺栓锁紧。针对空间站主动隔振器研制过程中松不脱螺栓锁紧诱发的频率漂移问题，探索了空间站主动隔振器锁紧状态非线性连接动力学机理建模与试验验证。对基于松不脱螺栓的隔振器锁紧释放装置进行力学分析，并根据松不脱螺栓接触面应力的非线性分布建立基于Iwan模型的系统等效动力学模型，分析动力学响应的非线性特性。研制空间站主动隔振器样机进行正弦振动试验，验证所建立动力学模型的准确性和有效性，为空间站精密科学设备环境适应性设计提供参考。更多还原

【Abstract】 A large number of scientific instruments and equipment on space station need to be fastened with unloosening bolt. Here, aiming at the frequency drift problem induced due to locking with unloosening bolt in development process of active vibration isolators on space station, the nonlinear connection dynamic mechanism modeling and test verification for locking state of space station active vibration isolators were explored. Mechanical analysis was performed for locking and releasing device of vibration isolator based on unloosening bolt. Based on nonlinear distribution of contact surface stress of unloosening bolt, the equivalent dynamic model of the system based on Iwan model was established to analyze nonlinear characteristics of its dynamic responses. The prototype of space station active vibration isolator was made for sinusoidal vibration tests to verify the correctness and effectiveness of the established dynamic model, and provide a reference for environmental adaptability design of space station precision scientific equipment.更多还原