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| Random Vibration Response of Hypersonic Missile |
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| DOI：10.7643/issn.1672-9242.2023.02.007 |
| KeyWord:hypersonic missile random vibration fluctuation pressure modal analysis acceleration response extreme stress |
| Author | Institution |
| CHAO Zheng |
College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing , China |
| JIANG Shu-bo |
College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing , China |
| ZHANG Guang-ming |
College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing , China |
| WANG Gang |
201 Institute of the Second Research Institute of China Aerospace Science and Industry Corporation, Beijing , China |
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| Abstract: |
| The work aims to study the vibration state of a hypersonic missile during flight and obtain the vibration response characteristics of the missile under a given pressure load. Combined with finite element analysis and random vibration theory, the finite element model of the missile was constructed with the three-dimensional software, and the modal analysis and harmonic response analysis were carried out on the platform of Ansys Workbench. Based on the modal analysis results, the random vibration response test of the missile was carried out to explore the vibration response characteristics of the missile in frequency domain and mechanics. The first six natural frequencies and vibration modes of the missile were calculated. The acceleration response curve of a detection point on the missile under a given vibration excitation load was obtained. The stress distribution pattern of the overall structure of the missile was obtained. The strength of the missile model meets the requirements. The peak acceleration response of the missile under vibration excitation load appears between 380 Hz and 400 Hz, and the extreme stress appears in the tail area of the missile. In this area, the missile is more prone to structural damage. In the ground environment simulation experiment of the missile, the vibration conditions in this frequency domain and position should be emphatically considered. |
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