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Application of modal effective parameters in mechanics characteristic simulation for satellite payload

XU Guangzhoua,RUAN Pinga,LI Fua,WANG Hongweia,b,GE Weia(a.Xi'an Institute of Optics & Precision Mechanics,Chinese Academy of Sciences,Xi'an 710119,China; b.Graduate School,Chinese Academy of Sciences,Beijing 100039,China)  
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.
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