摘要
通过对白车身有限元模型分析建立了车内声腔声学模型,结合对车内噪声峰值频率和声腔模态频率的对应性分析,找出了板件辐射噪声的主要贡献频率。通过对板件贡献量分析找出对驾驶员右耳声学贡献量较大的板件,确定了阻尼材料的最佳粘贴位置和厚度。实车测试表明,粘贴阻尼材料后车内(90 Hz处)声压级降低了4.97 d B,达到了降噪的目的。
Interior sound cavity ＆ acoustic model was built through analysis of the body-in-while FE model, and combined with analysis of interior noise peak frequency and sound cavity mode frequency, the main frequency contributed to panel radiated noise was identified. Through analysis of panel contribution, the panel which made the largest acoustic contribution to the right ear of the driver was found, and the optimal pasting position and thickness of damping material were defined. Vehicle test shows that the interior sound pressure level was reduced by 4.97dB after the damping material was pasted, the noise level was reduced.
作者
侯献军
郭金
杜松泽
郭彩祎
Hou Xianjun;Guo Jin;Du Songze;Guo Caiyi(Hubei Key Laboratory of Advanced Technology for Automotive Component;Hubei Collaborative Innovation Center for Automotive Components Technology-, Wuhan 43007)
出处
《汽车技术》
CSCD
北大核心
2018年第5期41-45,共5页
Automobile Technology
基金
国家自然科学基金项目(51575410)
国家新能源汽车科学与关键技术学科创新引智基地资助(B17034)
关键词
白车身
声腔模态
板件贡献
降噪
Body-in-white
Sound cavity mode
Panel contribution
Noise reduction
