基于贝叶斯的卫星螺栓连接结构含迟滞效应动力学参数识别

Dynamic parameter identification with hysteresis effect of satellite bolted structures based on Bayes

中文关键词: 螺栓连接结构，Bouc-Wen模型，贝叶斯推断模型，非线性迟滞

英文关键词: Bolt connection structure  Bouc - Wen model  Bayesian inference model  Nonlinear hysteresis

中文摘要:

      在卫星等航天器结构运行过程，螺栓连接的存在会导致卫星的整体刚度损失和能量耗散。本文对于某卫星的螺栓连接结构开展了含能量耗散迟滞效应的动力学参数识别分析方法研究。首先针对螺栓连接的力学特征给出了含动力学耗散的Bouc-Wen（B-W）连接模型，并推导其在不同载荷下的方程新式。进而分别构建了力锤激励冲击加载和激振器周期加载试验系统，基于贝叶斯推断模型开展了螺栓结构动力学参数反演识别研究，计算出表征Bouc-Wen模型的螺栓连接结构动力学参数，绘制了螺栓连接结构在周期载荷下的滞回曲线。最后，基于Bouc-Wen模型计算了不同荷载下卫星螺栓连接结构的加速度，通过与实测数据进行对比验证了本文所提方法的可行性。

英文摘要:

      The bolt connection structure would lead to the loss of satellite stiffness and energy dissipation during in the operation process of spacecraft such as satellite. The paper presents the dynamic parameter identification method with energy dissipation hysteresis behavior of a bolted structure of a satellite. Firstly, the Bouc-Wen (B-W) model of bolted connection structure with dynamic dissipation is derived. A series of new form of B-W model are given under different loads. Then, the hammer impact excitation loading and exciter periodic excitation loading testing systems were established respectively to carry out the dynamic parameter identification of bolt connection structure based on the Bayesian inference model. The dynamic parameters of Bouc-Wen model together with the hysteretic curve of blot structure were obtained under periodic loads. Finally, the accelerations of satellite bolted structure was calculated based on Bouc-Wen model. The comparison between the measured data and computed results indicates that the present method has the good feasibility in the dynamic parameter identification with hysteresis effect of bolted structure.