摘要
某校车在加速工况下驾驶室内出现异响,严重影响整车舒适性。通过主观评价、频谱特征分析、声学互动滤波法的应用,实现对异响频率成分的确认。再通过综合运用铅包裹法、近场测量法等噪声源识别方法,确定该异响源为整车排气弹性连接管,通过优化弹性连接管结构解决了异响故障。
An abnormal noise in front of a school bus appeared when it accelerated rapidly ’ which negatively affected the comfort of passengers. Methods’ such as subjective evaluation, spec-trum analysis and acoustic interactive evaluation ’ were utilized to analysis the components of the ab-normal noise frequency. Noise sources identification methods’ such as lead wrap’ near field meas-urement and so on were used to identify the abnormal noise sources. It was identified that the noise was generated by the flexible pipe of the vehicle.
作者
翟旭茂
解现龙
文志永
田新伟
ZHAI Xumao;XIE Xianlong;WEN Zhiyong;TIAN Xinwei(State Key Laboratory of Engine Reliability,Weifang 261061 ,China;Weichai Power Co.,Ltd.,Weifang 261061,China)
出处
《内燃机与动力装置》
2017年第6期65-70,共6页
Internal Combustion Engine & Powerplant
关键词
校车
异响
弹性连接管
NVH
school bus
abnormal noise
flexible pipe
NVH
