某型内燃机车驾驶室阻尼优化降噪分析  

Damping Optimization and Noise Reduction Analyses of a Diesel Locomotive Cab

作　　者：张超[1] 张劲松 李帅 徐巍 周明刚[1] ZHANG Chao;ZHANG Jinsong;LI Shuai;XU Wei;ZHOU Minggang(Agricultural Machinery Engineering Research and Design Institute,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学农机工程研究设计院,武汉430068

出　　处：《噪声与振动控制》2022年第3期150-154,共5页Noise and Vibration Control

基　　金：湖北省技术创新专项资助项目(2017ABA164)。

摘　　要：为降低某型号内燃机车驾驶室噪声,对驾驶室结构上的阻尼材料进行布局优化设计。建立驾驶室声学数值模型,采用基于模态的声-振耦合法计算驾驶室声学响应,提取驾驶员耳旁声压级找出噪声声压峰值处所对应的振动频率;对驾驶室进行板块贡献量分析,找到对噪声声压峰值处噪声贡献较大的壁板;为了降低39 Hz、73 Hz、110 Hz频率处噪声,建立拓扑优化数值模型求解自由阻尼的优化布局,构建优化后的数值模型计算5 Hz~120 Hz驾驶室声学响应,结果表明自由阻尼材料的优化布局能够降低驾驶室内噪声。In order to reduce the noise of a certain diesel locomotive cab,the layout of the damping materials in the cab structure is optimized.An acoustic numerical model of the cab is established,and the acoustic response of the cab is calculated by using the mode-based vibro-acoustic coupling method.The sound pressure level at the driver′s ear is extracted to find the vibration frequency corresponding to the peak noise sound pressure.Noise contribution of the cab is analyzed and the wall plates that have larger contributes to the peak noise sound pressure are found.In order to reduce the noise at the frequencies of 39 Hz,73 Hz and 110 Hz,the numerical model for topology optimization is established to solve for the optimized layout of the free damping.And then the optimized numerical model is constructed to calculate the acoustic response of the cab in the frequency range from 5 Hz to 120 Hz.The results show that the optimized layout of the free damping materials can reduce the noise in the cab.

关 键 词：声学 声-振耦合 拓扑优化 布局优化 自由阻尼 

分 类 号：TB52.4[理学—物理] TB535[理学—声学]