基于Moore响度的声品质驱动的低频结构优化设计  

Optimization Design of Low-frequency Structures driven by Sound Quality based on Moore Loudness

作　　者：何智成[1] 许煊煚 秦晓凯 黄元毅 徐铁 郝耀东[1,3] HE Zhicheng;XU Xuanjiong;QIN Xiaokai;HUANG Yuanyi;XU Tie;HAO Yaodong(State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,Changsha 410082,China;SAIC-GM-Wuling Automobile Co.Ltd.,Liuzhou 545007,Guangxi China;China Automotive Technology and Research Center Co.Ltd.,Tianjin 300399,China)

机构地区：[1]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [2]上汽通用五菱汽车股份有限公司,广西柳州545007 [3]中汽研(天津)汽车工程研究院有限公司,天津300399

出　　处：《噪声与振动控制》2018年第5期128-133,179,共7页Noise and Vibration Control

基　　金：湖南省湖湘青年英才基金资助项目(2015RS4023)

摘　　要：人民对美好生活的向往需要高品质的新能源汽车,客户对电动汽车噪声的主观感受直接影响着整车产品形象,声品质的概念也随之产生,它的评价范围包括响度、尖锐度、粗糙度、抖动度等方面。以某型号电动车为研究对象,并以30 km/h匀速行驶状态为研究工况,首先构造整车噪声有限元模型并进行求解,对频响曲线进行Moore响度分析,然后再对不同频带的特征响度对总响度贡献程度不同及对应的结构敏感区域不同,重点提出特征响度灵敏度和响度结构灵敏度的概念,建立声品质与产品结构变量之间的映射关系。并通过结构优化和增加阻尼的方式,使1.9 ERB的特征响度值降低78%,总响度降低16%,具有显著的优化成效。With the development of living standard,people become more and more critical for the performance of vehicle’s NVH than before,and the concept of sound quality,including loudness,sharpness,roughness,fluctuation,etc.,came up.In this paper,a certain type miniature electric vehicle in steady driving state of 30 km/h is researched.The model of the miniature electric vehicle is established and simulated.The Moore loudness is analyzed based on the frequency response curve.The concepts of characteristic-loudness sensitivity and loudness-structure sensitivity are put forward and the mapping function between sound-quality and structural parameters of the vehicle is established.Through optimizing the structure and adding the damping,the values of characteristic loudness and overall loudness of the vehicle are reduced by 78%and 16%respectively.

关 键 词：声学 声品质 Moore响度分析 响度结构灵敏度 结构优化 

分 类 号：TB535[理学—物理]