摘要
随着大推力发动机的应用、运载火箭中型/重型化发展,运载火箭各舱段如整流罩等在主动飞行段将面临愈发恶劣的噪声环境。因此,如何有效控制运载舱段噪声量级,改善单机设备、卫星等有效载荷主动飞行段声振环境显得尤为重要。声学超材料是近年来减振降噪领域研究的热点,基于局域共振声学超材料原理,设计了金属+橡胶局域振子共振声学超材料,并基于仿真分析和声学性能测试结果,以某模拟舱段为研究对象,开展了相应的减振降噪仿真分析及试验验证。仿真和试验结果表明:局域共振声学超材料在全频段都具有较好的减振降噪效果,特别是在1 000 Hz以内,降噪效果也较为明显;基于统计能量法建模仿真分析,将声学超材料实测隔声量通过插入损失来进行模拟,仿真结果与试验结果一致性较好,误差在工程应用可接受范围内。研究成果对后续声学超材料在运载火箭整流罩等舱段减振降噪应用方面有一定的指导意义。
With the application of high thrust engines and the development of medium/large launch vehicles,the acoustic and vibration environment of typical cabin such as fairing will be more and more severe in the flight.Therefore,it is particularly important to effectively control the noise level of the cabin and improve the acoustic and vibration environment of electronic equipments and satellite payloads. Acoustic metamaterial has been a hot topic in the field of vibration and noise reduction in recent years. Based on the principle of local resonant acoustic metamaterial,a metal + rubber local oscillator resonant acoustic metamaterial is designed. Based on the simulation analysis and acoustic performance test results,the corresponding vibration reduction and noise reduction for a simulated cabin are verified. The results show that the local resonant acoustic metamaterial has good vibration and noise reduction effects in the whole frequency band,especially,the vibration and noise reduction effect in the range of 1 000 Hz is significant.The sound insulation loss of acoustic metamaterial is measured by insertion loss simulation based on the statistical energy method. The simulation results are in good agreement with the test results,and the error is within the acceptable range of engineering application. The research results have a certain guiding significance for the vibration and noise reduction application of acoustic metamaterial in the cabin of launch vehicle such as fairing.
作者
龙新军
胡迪科
周小玲
欧阳涵
韩冬梅
LONG Xinjun;HU Dike;ZHOU Xiaoling;OUYANG Han;HAN Dongmei(Shanghai Aerospace System Engineering Institute,Shanghai 201109,China)
出处
《上海航天（中英文）》
CSCD
2020年第S02期36-43,共8页
Aerospace Shanghai（Chinese&English）
基金
装备预先研究项目(JZX7Y20190250028401)
关键词
局域振子
声学超材料
统计能量法
插入损失
减振降噪
oscillator
acoustic metamaterial
statistical energy analysis
insertion loss
vibration and noise control
作者简介
龙新军(1989-),男,硕士,主要研究方向为运载器、航天器力学环境设计及动力学仿真。
