基于悬置结构传递路径优化车内轰鸣声  

Optimization of Vehicle Roar Based on Transfer Path Analysis of Suspension Structure

作　　者：刘钢[1] 王圣波 杨依 臧泽楠 LIU Gang;WANG Sheng-bo;YANG Yi;ZANG Ze-nan(l.Project Dept.,FAW Haima Automobile Co.,Ltd.,Hainan Haikou 570216,China;The Department of Industry and Information Engineering,Vocational Technology College of Hainan,Hainan Haikou 570216,China)

机构地区：[1]一汽海马汽车有限公司项目部,海南海口570216 [2]海南职业技术学院工业与信息学院,海南海口570216

出　　处：《机械设计与制造》2023年第5期198-201,共4页Machinery Design & Manufacture

基　　金：国家科技支撑计划项目(2013BAG07B00);海南省高等学校教育教学改革研究项目(Hnjg2017ZD-23)。

摘　　要：根据传递路径分析的基本原理,结合实际工况测试识别车内加速轰鸣声的主要频次和成分,诊断出后悬置拉杆在89Hz左右产生结构振动耦合,造成加速过程中车内轰鸣声。通过CAE仿真手段对后悬置拉杆进行结构优化避频,在端头位置增加380g质量块后,有效的改变后悬置拉杆Z向固有频率从88Hz下降到79Hz,达到了预期效果。方案经验证后表明汽车悬置系统是动力总成振动噪声的主要结构传递路径,针对悬置系统进行刚体模态优化避频,可降低结构路径对激励源的放大作用,使得加速车内轰鸣声得到明显改善。According to the basic principle of transfer path analysis,combined with the actual working condition test,the main frequency and components of the interior acceleration roar are identified.It is diagnosed that the rear mount pull rod produces structural vibration coupling at about 89Hz,resulting in the interior roar during acceleration.Through CAE simulation method,the structure of the rear suspension rod is optimized to avoid frequency.After adding 380g mass at the end position,the z-direction natural frequency of the rear mounting rod is effectively changed from 88Hz to 79Hz,and the expected effect is achieved.After verification vehicle mounting system is the main structural transmission path of vibration and noise of powertrain,the scheme shows that the frequency avoidance of rigid body mode optimization for the mounting system can reduce the amplification effect of the structural path on the excitation source,and improve the interior roar significantly.

关 键 词：车内噪声 轰鸣声 结构路径 后悬置 

分 类 号：TH16[机械工程—机械制造及自动化] TH122[机械工程—车辆工程] U467.493[交通运输工程—载运工具运用工程]