|
| Engineering Prediction Method of the Vibration Environment for Re-entry Vehicle |
| Received:February 04, 2021 Revised:February 16, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2021.03.002 |
| KeyWord:re-entry vehicle engineering prediction method vibration fluctuating pressure |
| Author | Institution |
| LI Chun-li |
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang , China |
| SHI Xian-jie |
Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang , China |
|
| Hits: |
| Download times: |
| Abstract: |
| This paper is to provide method support for the vibration environment design of the re-entry vehicle, and provide load input for the structural design and the formulation of ground environment test conditions. Firstly, the main characteristics and inducing factors of re-entry vehicle are investigated. Secondly, the influence rule of small angle of attack on flight vibration environment is studied based on the measured flight test vibration data. Then, the relations among fluctuating and dynamic pressure, mach number and angle of attack is derived. Based on the traditional fluctuating pressure prediction method, the pulsating pressure RMS prediction model of reentry flight with considering the influence of angle of attack is established. Finally, the prediction method of re-entry vibration environment engineering is presented. The variation trend of the fluctuating pressure calculated by the present model is basically consistent with that of the measured vibration value. The relations among the fluctuating pressure and the angle of attack, dynamic pressure and mach number deduced in this article is basically reasonable. Based on the measured data and fluctuating pressure characteristics, the vibration environment engineering prediction model of re-entry vehicle is established. With the measured vibration and aerodynamic load data, the vibration environment of re-entry vehicle can be predicted, which can realize the detailded design of vibration environment load for re-entry vehicle. It can also provide load input for structural design. |
| Close |
|
|
|