【摘要】 为了抑制微振动对拼接式望远镜成像的影响，针对共相装置镜面组件进行了模态测试及动力有限元修正。由于其结构和接触复杂，将模型进行了简化；基于模态测试结果，采用改进正交模型-正交模态法（improve cross mode-cross mode method,ICMCM）对有限元模型进行动力修正；对修正后模型进行了阶跃响应求解，并与实测结果对比，以验证模型修正的有效性。测试结果表明：修正后的模型一阶频率误差由5.2%下降至0.2%，阶跃响应与仿真6个测试点的位移峰值、峰值时间基本一致，位移峰值最大误差为8.8%。研究结果表明，将镜面组件简化后再通过ICMCM法修正，在提升计算效率的同时可保持模型的准确性。更多还原

【Abstract】 In order to suppress the influence of microvibration on the imaging of the spliced telescope, modal tests and kinetic finite element correction were performed for the mirror assembly of the co-phase devices. Due to its complex structure and contact, the model was simplified, and then based on the results of the modal test,the improved cross mode-cross mode method(ICMCM) was used to correct the dynamics of the finite element model. The step response of the corrected model was solved and compared with the measured results to verify the validity of the model correction. The test results show that the first-order frequency error of the corrected model decreases from 5.2% to 0.2%, the step response is basically the same as the displacement peaks and peak time of the six measurement points of the simulation, and the maximum error of the displacement peak is8.8%. The research results show that after simplification of mirror assemblies and correction of ICMCM, the accuracy of the model can be maintained while improving the computational efficiency.更多还原