噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2015年
2期
77-79,85
,共4页
声学%声源识别%异响%模态分析%声品质
聲學%聲源識彆%異響%模態分析%聲品質
성학%성원식별%이향%모태분석%성품질
acoustics%noise source identification%abnormal noise%modal analysis%sound quality
以某型SUV车在怠速工况时，车内存在“嗡鸣”异响噪声为研究对象，运用频谱分析法、声学互动滤波法、主观评价法，实现对异响噪声频率成分的确认。再通过综合运用传递路径分析法、近场测量法、铅包覆法等噪声源识别方法，实现异响噪声源的快速识别，并确认发动机正时罩盖为异响噪声源。最后利用模态分析技术对噪声源进行结构优化，大幅降低其辐射噪声，最终达到有效改善车内声品质，提高整车NVH性能的目的。
以某型SUV車在怠速工況時，車內存在“嗡鳴”異響譟聲為研究對象，運用頻譜分析法、聲學互動濾波法、主觀評價法，實現對異響譟聲頻率成分的確認。再通過綜閤運用傳遞路徑分析法、近場測量法、鉛包覆法等譟聲源識彆方法，實現異響譟聲源的快速識彆，併確認髮動機正時罩蓋為異響譟聲源。最後利用模態分析技術對譟聲源進行結構優化，大幅降低其輻射譟聲，最終達到有效改善車內聲品質，提高整車NVH性能的目的。
이모형SUV차재태속공황시，차내존재“옹명”이향조성위연구대상，운용빈보분석법、성학호동려파법、주관평개법，실현대이향조성빈솔성분적학인。재통과종합운용전체로경분석법、근장측량법、연포복법등조성원식별방법，실현이향조성원적쾌속식별，병학인발동궤정시조개위이향조성원。최후이용모태분석기술대조성원진행결구우화，대폭강저기복사조성，최종체도유효개선차내성품질，제고정차NVH성능적목적。
The abnormal buzzing noise inside an SUV under idle condition was studied. Some methods, such as spec-trum analysis, acoustic interactive filtering and subjective evaluation, were utilized to analysis the components of the abnor-mal noise frequency. Some noise source identification methods, such as the transfer path analysis, near field measurement, lead wrap etc., were used to rapidly identify the abnormal noise sources. The engine timing-cover was found to be the main abnormal noise source. Finally, the structural optimization of the abnormal noise source was realized using modal analysis technique, and the radiation noise of the timing-cover was greatly reduced. The interior sound quality and the NVH perfor-mance of the vehicle were improved.
