摘要
针对地铁车辆低频结构噪声超标、乘坐舒适性较差的问题,建立某型地铁的结构整备模型、声腔模型以及声固耦合模型,基于模态试验与模态理论,验证模型的准确性。对整车进行噪声响应分析,获取噪声响应声压峰值曲线。基于节点贡献量分析与工作变形分析,确定引起车辆超标噪声的问题区域。最后对问题区域的板件进行结构参数优化,在保证车体总重量控制在合理范围内的条件下,使车辆整体声压水平下降2.8 dB(A)。研究表明:该方法能够指导地铁车辆低频结构噪声的诊断与优化,进而提高车辆的乘坐舒适性。
Aiming at the problem that the low-frequency structural noise of subway vehicles exceeds the standard and the riding comfort is low,the structural maintenance model,the sound cavity model and the sound-structure coupling model of a certain type of subway were established.Based on modal test and modal theory,the accuracy of the models was verified.The noise response of the vehicle was analyzed and the peak sound pressure curve of the noise response was obtained.Based on node contribution analysis and working deformation analysis,the problem areas causing excessive vehicle noise were determined.Finally,by optimizing the structural parameters of the panels in the problem area,the overall sound pressure level of the vehicle was reduced by 2.8 dB(A)under the condition that the total weight of the vehicle body is controlled within a reasonable range.The results show that the proposed method can guide the diagnosis and optimization of the low frequency structural noise of subway vehicles,and improve the ride comfort of the vehicles.
作者
徐天尧
阳光武
肖守讷
朱涛
杨冰
柯亚汉
XU Tianyao;YANG Guangwu;XIAO Shoune;ZHU Tao;YANG Bing;KE Yahan(State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031,China)
出处
《噪声与振动控制》
北大核心
2025年第5期184-189,265,共7页
Noise and Vibration Control
基金
国家自然科学基金资助项目(52172409)。
关键词
振动与波
地铁车辆
结构噪声
节点贡献量
工作变形分析
参数优化
vibration and wave
subway vehicle
structural noise
node contribution
working deformation analysis
parameter optimization
