摘要
基于某款搭载四缸机轿车在500~650 Hz频段的加速声品质问题,采用时域TPA方法进行了问题的复现,并通过三个层级的TPA分解,确定主要贡献来自于右悬置X向的结构声。采用CAE方法完成了右悬置被动侧支架X向噪声传递函数在500~650 Hz频段存在峰值的原因分析,确定问题来自于支架的模态。通过对支架进行优化后,使得噪声传递函数下降了5~10 dB,最终使车内500~650 Hz的共振带明显减弱,解决了加速声品质问题。
For a sound quality issue during the accelerating condition of a sedan carrying a four-cylinder internal combustion engine, time-domain transfer path analysis(TPA) was used to reproduce the issue. A three-level TPA composition was introduced to determine that the issue was mainly contributed by the structure borne noise from the X direction of the right passive engine mount bracket. Then CAE technology was adopted to analyze root cause of noise transfer function peak of this path, which indicated that the bracket mode existed in 500~650 Hz. The noise transfer function was reduced by 5~10 dB after the optimization of the bracket, which weakened the resonance and solved the sound quality issue.
作者
毛杰
陈志东
邱毅
周昌水
张亚楠
姚再起
MAO Jie;CHEN Zhidong;QIU Yi;ZHOU Changshui;ZHANG Yanan;YAO Zaiqi(Automotive Engineering Institute,Zhejiang Geely Holding Group Co.,Ltd.,Hangzhou,Zhejiang,310000,China;Geely Automobile Research and Development(Ningbo)Co.,Ltd.;Department of Energy Engineering,Zhejiang University)
出处
《小型内燃机与车辆技术》
2022年第5期59-62,86,共5页
Small Internal Combustion Engine and Vehicle Technique
基金
国家重点研发计划《工业装备结构拓扑优化核心算法与自主可控软件研发》项目(2020YFB1709400)。
