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| Random Vibration Response Analysis of Structures under Multi-dimensional Excitation |
| Received:October 16, 2012 Revised:March 01, 2013 |
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| DOI： |
| KeyWord:multi-dimensional excitation random vibration vibration mode functions |
| Author | Institution |
| NONG Shao-ning |
Institute of Systems Engineering CAEP，Mianyang，China |
| TIAN Guang-ming |
Institute of Systems Engineering CAEP，Mianyang，China |
| ZHAO Huai-yun |
Institute of Systems Engineering CAEP，Mianyang，China |
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| Abstract: |
| Base on random vibration method, through spectrum function analysis, the random vibration response calculation of typical structures under multi-dimensional excitation was given. MESA and MESE examples were demonstrated according the theoretical analysis results. Numerical analysis results indicated that, for linear structures, the responses of multi-dimensional excitation are the sum of one-dimensional excitation; however for the difference of mode functions of each single exciter, the structural vibration responses may increase or decrease compared with that of single exciter; in special case, the responses of anti-symmetric mode can even disappear. The influence of structural vibration responses character under multi-dimensional excitation is worth of attention of the designers of engineering structures. |
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