基于声振传递的飞行器噪声振动环境预示方法研究  

A method for predicting aircraft noise and vibration environment based on acoustic and vibration transmission

作　　者：李炳蔚[1] 朱红民[1] 刘时秀[2] 陈刚[3] LI Bingwei;ZHU Hongmin;LIU Shixiu;CHEN Gang(China Academy of Launch Vehicle Technology,Beijing 100076,China;Beijing Institute of Structure and Environment Engineering,Beijing 100076,China;Beijing Aerospace Long March Aircraft Research Institute,Beijing 100076,China)

机构地区：[1]中国运载火箭技术研究院,北京100076 [2]北京强度环境研究所,北京100076 [3]北京航天长征飞行器研究所,北京100076

出　　处：《振动与冲击》2024年第1期290-296,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金面上项目(11972377);国家自然科学基金青年基金(11902364)。

摘　　要：针对高速飞行器飞行条件下的噪声、振动环境恶劣、复杂、难预示的问题,提出了基于声振传递的飞行器飞行条件下的噪声、振动环境预示方法。采用数值仿真、脉动压力风洞试验或工程分析等方法,获取飞行器在典型工况下的舱外脉动压力场;通过噪声试验或声振耦合仿真分析的方法,得到飞行器声振传递特性;根据获得的舱外脉动压力和声振能量传递特性,结合具体飞行参数得到实际飞行条件下的飞行器声振预示环境。采用该方法对某飞行器开展了振动环境预示研究,经地面及飞行试验验证振动环境量级预示精度可达1.6 dB。提出的基于声振传递的飞行声振环境预示方法可以广泛应用在导弹、火箭等飞行器的精细化环境设计中,对于提高飞行器总体性能、环境适应性和飞行可靠性具有重要的工程意义。Here,aiming at problems of harsh,complex,and difficult prediction of noise and vibration environment under high-speed aircraft flight conditions,a method for predicting high-speed aircraft noise and vibration environment under flight conditions based on sound vibration transmission was proposed.Firstly,numerical simulation,fluctuating pressure wind tunnel tests or engineering analysis methods were used to obtain external fluctuating pressure field of aircraft under typical operating conditions.Then,through noise testing or acoustic-vibration coupled simulation analysis,acoustic-vibration transmission characteristics of aircrafts were obtained.Finally,according to the obtained extravehicular pulsating pressure and acoustic-vibration energy transfer characteristics,combined with specific flight parameters,aircraft acoustic-vibration prediction environment under actual flight conditions was obtained.The proposed method was used to perform vibration environment prediction study for a certain aircraft.It was shown that the accuracy of vibration environment magnitude level prediction can reach 1.6 dB verified with ground and flight tests;the proposed method can be widely applied in refined environmental design of missiles,rockets and other aircrafts,and have important engineering significance for improving overall performance,environmental adaptability,and flight reliability of aircrafts.

关 键 词：声振传递 飞行器 声振环境 环境预示 飞行环境 脉动压力 

分 类 号：V421.1[航空宇航科学与技术—飞行器设计] V216.5