| 摘要: |
| 为了对某双星整流罩结构进行振动环境的预示，采用能量有限元分析（EFEA）的方法，建立了整流罩结构的能量有限元模型，并对其进行了振动环境的预示。作为比较，选取统计能量分析方法（SEA），建立了该整流罩的统计能量模型，并与EFEA方法和实验测试结果进行了比较。结果表明，EFEA方法与SEA方法的结果在一定的频段内可以较好地预示结构，而且在该频段内，EFEA方法的结果相对SEA方法更接近于实测值，同时相比SEA方法，EFEA可以得到预示结果的空间分布。 |
| 关键词: 能量有限元 统计能量 声振环境预示 整流罩 |
| DOI： |
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| 基金项目: |
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| Prediction for Vibration Environment of the Double Stars Fairing Structure Based on Energy Finite Element |
| WANG Huaizhi,YU Kaiping,ZENG Yaoxiang,WANG Xu,ZHANG Zongqiang |
| (Harbin Institute of Technology;Beijing Institute of Astronautical Systems Engineering;Xi'an Aerospace Propulsion Testing Technology Research Institute) |
| Abstract: |
| In order to predict the vibration environment of a double stars fairing structure, this paper uses energy finite element analysis (EFEA) to establish the model of fairing structure, and its vibration environment is predicted. Then, the statistical energy analysis (SEA) method is selected and the statistical energy model of the fairing is established and compared with the EFEA method and the experimental results. The results show that the energy finite element method and the SEA method can well predict the vibration of the structure. Moreover, the results of the EFEA method are closer to the measured values than the SEA method, and the EFEA can obtain the spatial distribution of the predicted results compared to the SEA method in the frequency band. |
| Key words: Energy finite element Statistical energy Acoustic-vibration environment Fairing structure |