基于阻尼辨识的双层厚壁结构声振环境预示研究

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (21) : 225-231.

论文

赵长见 1,2，李炳蔚 2，张志勇 2，牛智玲 2，刘博 2

作者信息 +

The investigation on the acoustic-vibration environment prediction of the double-layered thick-walled structure based on the damping identification

Zhao Changjian 1,2 Li Bingwei 2 Zhang Zhiyong 2 Niu Zhingling 2 Liu Bo 2

Author information +

文章历史 +

摘要

高超声速飞行器主要舱段一般为双层厚壁结构,以满足防热和载荷需求。为了精确预示高超声速飞行器舱段结构的声振响应，开展了基于阻尼辨识的双层厚壁结构声振环境预示研究，提出了一种基于声振试验的阻尼损耗因子辨识方法，给出了基于阻尼辨识数据库的声振环境预示流程。以某超高声速飞行器双层厚壁舱段为研究对象，对结构声振耦合环境进行了统计能量分析，开展了声振试验和基于试验的阻尼辨识，得到了与试验结果吻合较好的声振环境预示结果。提出的双层厚壁结构阻尼辨识方法和声振环境预示方法对于飞行器结构动力学环境精确预示具有重要意义，可以广泛应用于航天、航空、船舶和汽车等领域。

Abstract

The main cabins of the hypersonic vehicle are double-layered thick-walled structures, in order to meet the requirement of the heatproof and load bearing. The acoustic-vibration environment prediction of the double-layered thick-walled structure is investigated, in order to obtain the precise acoustic-vibration environment of the cabin. A method of identifying the damping loss factor is proposed based on the vibro-acoustic experiments, and the process of acoustic-vibration environment predication is given in this paper. The acoustic-vibration coupling environment a hypersonic vehicle cabin, which is double-layered thick-walled, is studied using statistical energy analysis method. The vibro-acoustic experiment is carried out, and the damping loss factor is identified based on the experimental data. The result shows that the prediction of the acoustic-vibration environment corresponds well with the experiment. The method of structural damping loss factor identification and acoustic-vibration prediction of the thick wall structure has an important significance on precise prediction of the hypersonic vehicles, and can be widely used in the area of aviation, aerospace, ship, and automobile industry.

导出引用

赵长见 1,2，李炳蔚 2，张志勇 2，牛智玲 2，刘博 2. 基于阻尼辨识的双层厚壁结构声振环境预示研究[J]. 振动与冲击, 2017, 36(21): 225-231

Zhao Changjian 1,2 Li Bingwei 2 Zhang Zhiyong 2 Niu Zhingling 2 Liu Bo 2. The investigation on the acoustic-vibration environment prediction of the double-layered thick-walled structure based on the damping identification[J]. Journal of Vibration and Shock, 2017, 36(21): 225-231

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