Application of FE-SEA hybrid method in vibro-acoustic environment prediction of complex structure

13th International Conference on Motion and Vibration Control; 12th International Conference on Recent Advances in Structural Dynamics

Qin, Z.H.^1 ; Zhang, Z.P.^1 ; Ren, F.^1 ; Li, H.B.^1 ; Liu, Z.H.^1 ; Zhang, Z.^1 ; Yuan, K.^1 ; Wang, Y.C.^1

Science and Technology on Reliability and Environment Engineering Laboratory, Beijing Institute of Structure and Environment Engineering, Beijing

100076, China^1

关键词: Complex structure;    Different frequency;    Loading methods;    Measuring points;    Modelling method;    Prediction methods;    Random vibration test;    Structural response;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/744/1/012238/pdf
DOI  :  10.1088/1742-6596/744/1/012238

来源: IOP

【 摘 要 】

Spacecraft sustains the complex and severe vibro-acoustic environments during the flight. Acoustic test is different from random vibration test, but they can complement the energy in different frequency band for each other. Vibro-acoustic environment prediction of structure can provide supports for measuring point arrangement and test condition defining. In this paper, the application of FE-SEA hybrid method in vibro-acoustic environment prediction of complex structure is studied. Structural response is predicted through reasonable loading method and modelling method. Vibro-acoustic test results show the validity of the prediction method.