【摘要】 为保证在相应力学环境下卫星有效载荷的可靠性,将模态有效参数引入到某卫星有效载荷整机力学特性仿真中,得到有效载荷的模态有效质量、模态参与因数和模态有效质量分数.该方法可有效判断有效载荷3个轴向整机固有频率,判断求解模态数目是否满足求解精度要求,为模态试验中传感器布置和测量点的选择提供参考.试验结果也表明模态有效参数在卫星有效载荷3个轴向整机模态识别上的可靠性.更多还原

【Abstract】 To ensure the reliability of satellite payload under the corresponding mechanics environment,the modal effective parameters are applied into the mechanics characteristic simulation of satellite payload for whole machine,and the effective modal mass,modal participation factors and effective mass fractions of satellite payload are obtained.The natural frequency in three axial directions of whole satellite can be effectively judged for satellite payload by the method.The method can be used to judge if the number of selected modes is adequate to satisfy the solution accuracy,and provide references for sensor distribution and position selection of measurement points in modal test.The test results also show that the modal effective parameters can effectively identify three axial directions modes of satellite payload for whole satellite.更多还原