摘要
利用计算流体动力学(Computational Fluid Dynamics,CFD)分析工具和声学风洞试验,对某款全新开发的SUV车型进行局部造型和车身密封隔音优化,车内气动噪声性能得到明显提升。外流场仿真计算和声源识别测试具有很好的一致性,识别出后视镜、前轮腔、A柱、雨刮等局部外形噪声声源部位,利用CFD仿真对流场进行优化,提出修改方案并通过实车测试验证效果,有效技术方案在新款车型上得到应用。根据泄漏噪声关键部位的识别,对车身密封和隔音进行了优化和提升,通过声学风洞试验验证了方案的实施效果,新款车型整车气动噪声车内声压级降低了约1.8 dB(A),语言清晰度(Articulation Index,AI)提升了10%,提升效果明显。
By using the CFD simulation method and wind tunnel testing,the aerodynamic noise performance of a newly developed SUV vehicle was significantly improved compared with the previous generation.Firstly wind tunnel testing was conducted to identify the acoustic noise sources such as rear mirror,rain wiper,tire wheelhouse,etc.The improvement countermeasures were proposed by using CFD optimization,verified by wind tunnel testing and applied to the newly developed SUV.As a result,the sound pressure level in the cabin declined by 1.8 dB(A),and the AI was improved by 10%.The complaint rate about the aerodynamic noise dramatically dropped in the market.
作者
黄勇
黄祚华
姚璐
王小碧
翁文同
HUANG Yong;HUAN Zuohua;YAO Lu;WANG Xiaobi;WENG Wentong(Technical Center,Dongfeng Motor Corporation,Wuhan 430058,China)
出处
《汽车工程学报》
2019年第6期391-399,共9页
Chinese Journal of Automotive Engineering
关键词
声学风洞
计算流体动力学
气动噪声
造型优化
acoustic wind tunnel
computational fluid dynamics
aerodynamic noise
style optimization
作者简介
黄勇(1985-),男,湖北孝感人。硕士,工程师,主要从事整车噪声控制与开发,以及声学包、风噪性能的研究工作。Tel:13667241100,E-mail:huangyong@dfmc.com.cn。
