内衬泡沫复合材料层合圆柱壳隔声特性分析  

Analysis of Sound Insulation Characteristics of Foam-lined Composite Laminated Cylindrical Shells in Low and Medium Frequency Ranges

作　　者：李彬 田颖 闻健 王宁 赵俊雅 LI Bin;TIAN Ying;WEN Jian;WANG Ning;ZHAO Junya(School of Mechanical Engineering,Wuhan Polytechnic University,Wuhan 430023,China;Hubei Institute of Specialty Vehicle,Suizhou 441300,Hubei,China;Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉轻工大学机械工程学院,武汉430023 [2]湖北省专用汽车研究院,湖北随州441300 [3]武汉理工大学新材料力学理论与应用湖北省重点实验室,武汉430070

出　　处：《噪声与振动控制》2023年第6期240-246,共7页Noise and Vibration Control

基　　金：海防技术创新中心创新基金资助项目(JJ-2020-719-01);湖北省自然科学基金青年项目资助(2021CFB292);武汉轻工大学校立科研杰出青年资助项目(2022J04);2022年度知识创新专项曙光计划资助项目(2022010801020393)。

摘　　要：基于复合材料火箭整流罩腔内噪声被动控制方法,将装载精密仪器的整流罩圆柱段等效为圆柱壳,采用仿真分析和实验测试相结合的方法探究内衬泡沫复合材料层合圆柱壳的中低频(100 Hz~1000 Hz)隔声特性。基于Virtual.Lab Acoustic声学软件建立有限元模型,并搭建实验平台,通过实验测试圆柱壳腔内响应以验证中低频下模型的正确性。仿真分析100 Hz~1000 Hz频段下内衬三聚氰胺泡沫(Melamine Foam,MF)厚度、敷设率和敷设位置等因素对复合材料层合圆柱壳隔声性能的影响规律。结果表明:在300 Hz~1000 Hz频段,随内衬泡沫厚度增加,复合材料层合圆柱壳隔声量增大;在430 Hz~1000 Hz频段,内衬泡沫敷设率在25%、50%和75%时,复合材料层合圆柱壳分别能达到17.24 dB、17.81 dB和19.05 d B的隔声效果。The passive noise control method is applied to control the internal noise of the fairing cavity of a composite rocket.The cylindrical section of the fairing with precision instruments equipped is equivalently simplified to a cylindrical shell.Simulation analysis and experimental study are performed to investigate the sound insulation characteristics of the foam-lined composite laminated cylindrical shell in the low and medium frequency range(100 Hz-1000 Hz).Based on the Virtual.Lab Acoustic software,a finite element model is established and an experimental platform is built to test the response in the cylindrical shell cavity to verify the correctness of the model at low and medium frequencies.The influence of the thickness,placement rate and location of the lined melamine foam(MF)on the sound insulation performance of the composite laminated cylindrical shell are analyzed in the frequency range of 100 Hz-1000 Hz.The results show that in the frequency range of 300 Hz-1000 Hz,the greater the thickness of the liner foam,the better the sound insulation performance of the composite laminated cylindrical shell;in the frequency range of 430 Hz-1000 Hz,the sound insulation effect of the composite laminated cylindrical shell can reach 17.24 dB,17.81 dB and 19.05 dB respectively when the liner foam placement rate is 25%,50%and 75%.

关 键 词：声学 三聚氰胺泡沫 复合材料层合圆柱壳 仿真 隔声特性 

分 类 号：TB535[理学—物理]