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| Acceleration Response Spectrum of Random Vibration and Equivalence Analysis with Shock Test |
| Received:August 05, 2023 Revised:October 14, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2024.01.001 |
| KeyWord:random vibration Wiener-Khinchine theorem acceleration response spectrum band-limited and non-uniform PSD shock response spectrum shock test |
| Author | Institution |
| CHEN Jiangpan |
Beijing Institute of Electronic System Engineering, Beijing , China |
| LIU Yan |
Beijing Institute of Electronic System Engineering, Beijing , China |
| LIU Yi |
Beijing Institute of Electronic System Engineering, Beijing , China |
| WANG Zengkai |
Beijing Institute of Electronic System Engineering, Beijing , China |
| SUN Limin |
Beijing Institute of Electronic System Engineering, Beijing , China |
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| Abstract: |
| The work aims to obtain the ARS (acceleration response spectrum) of random vibration and then to improve the analysis accuracy of the equivalence between random vibration and shock test. Firstly, the universal expression of the acceleration response RMS (root-mean-square) value of a single DOF (degree-of-freedom) vibration system under the action of random vibration base excitation was achieved according to the Wiener-Khintchinetheorem. Secondly, the acceleration response RMS value of the single DOF vibration system under the action of both white noise and random vibration with band-limited and non-uniform PSD (power spectral density) was deduced respectively. Thirdly, the 3σ ARS of random vibration with band-limited and non-uniform PSD was established on the basis of the 3σ guidelines. Lastly, in view of the equivalence of acceleration response, the cutting conditions for shock test were optimized through comparing the 3σ ARS of equipment random vibration test conditions with the SRS (shock response spectrum) of equipment shock test conditions. The analysis results of three examples indicated that the application accuracy in engineering of the cutting conditions for shock test was improved after optimization. In summary, the 3σ ARS of random vibration with band-limited and non-uniform PSD is established in this work, and then the cutting conditions for shock test in GJB 150.18A-2009 are optimized on account of the equivalence of acceleration response. It provides references for more reasonably cutting the shock test for equipment. |
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