噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2015年
4期
75-77,88
,共4页
刘胜%李丽华%董双涛
劉勝%李麗華%董雙濤
류성%리려화%동쌍도
声学%低频噪声%噪声频谱%空滤辐射噪声%模态%刚度
聲學%低頻譟聲%譟聲頻譜%空濾輻射譟聲%模態%剛度
성학%저빈조성%조성빈보%공려복사조성%모태%강도
acoustics%low frequency noise%noise spectrum%radiated noise of air filter%mode%stiffness
某款车在加速过程中，2000～3000 r/min存在明显的低频噪声，通过对车内噪声频谱和空滤辐射噪声关系的分析，指出空滤壳体模态偏低是其主要原因。利用CAE和试验相结合的方式，详细描述改进方案和措施。通过空滤壳体刚度的加强实现模态的提升，从而降低整车噪声在该区域内的噪声峰值，消除低频噪声，主观评价改善明显。
某款車在加速過程中，2000～3000 r/min存在明顯的低頻譟聲，通過對車內譟聲頻譜和空濾輻射譟聲關繫的分析，指齣空濾殼體模態偏低是其主要原因。利用CAE和試驗相結閤的方式，詳細描述改進方案和措施。通過空濾殼體剛度的加彊實現模態的提升，從而降低整車譟聲在該區域內的譟聲峰值，消除低頻譟聲，主觀評價改善明顯。
모관차재가속과정중，2000～3000 r/min존재명현적저빈조성，통과대차내조성빈보화공려복사조성관계적분석，지출공려각체모태편저시기주요원인。이용CAE화시험상결합적방식，상세묘술개진방안화조시。통과공려각체강도적가강실현모태적제승，종이강저정차조성재해구역내적조성봉치，소제저빈조성，주관평개개선명현。
There was an obvious low frequency noise between 2 000 r/min and 3 000 r/min during acceleration. This paper analyzed the relationship between the vehicle interior noise spectrum and the noise radiated by the air filter box, and showed that the main reason is a low frequency air filter box shell mode. The paper described an analysis and improvement process combining test and CAE. Finally, the mode frequency was improved by optimizing shell stiffness, and as a result the peak value of noise was reduced in the problem region;also low-frequency noise was eliminated. The subjective rating was much improved.
