噪声与振动控制
譟聲與振動控製
조성여진동공제
NOISE AND VIBRATION CONTROL
2014年
5期
95-98
,共4页
周熙盛%贺才春%胡金昌%查国涛
週熙盛%賀纔春%鬍金昌%查國濤
주희성%하재춘%호금창%사국도
声学%低频噪声%阻尼材料%模态分析%重型卡车
聲學%低頻譟聲%阻尼材料%模態分析%重型卡車
성학%저빈조성%조니재료%모태분석%중형잡차
acoustics%low-frequency noise%damping material%modal analysis%truck
提出一种基于模态分析的重卡驾驶室低频噪声控制方法，将其应用于一款在怠速工况下低频轰鸣噪声较严重的重型卡车上。首先对车内噪声的频谱特性进行测试分析，获取低频噪声的频率成分信息。然后对驾驶室白车身进行模态分析，确定噪声峰值频率与车身结构振动关系，并对该部位采用阻尼处理以降低结构辐射噪声。对处理后的试验车进行噪声评价测试，结果表明主要频率处的噪声峰值降低了5.4 dB(A)～7.5 dB(A)，试验车驾驶室低频噪声得到有效控制。
提齣一種基于模態分析的重卡駕駛室低頻譟聲控製方法，將其應用于一款在怠速工況下低頻轟鳴譟聲較嚴重的重型卡車上。首先對車內譟聲的頻譜特性進行測試分析，穫取低頻譟聲的頻率成分信息。然後對駕駛室白車身進行模態分析，確定譟聲峰值頻率與車身結構振動關繫，併對該部位採用阻尼處理以降低結構輻射譟聲。對處理後的試驗車進行譟聲評價測試，結果錶明主要頻率處的譟聲峰值降低瞭5.4 dB(A)～7.5 dB(A)，試驗車駕駛室低頻譟聲得到有效控製。
제출일충기우모태분석적중잡가사실저빈조성공제방법，장기응용우일관재태속공황하저빈굉명조성교엄중적중형잡차상。수선대차내조성적빈보특성진행측시분석，획취저빈조성적빈솔성분신식。연후대가사실백차신진행모태분석，학정조성봉치빈솔여차신결구진동관계，병대해부위채용조니처리이강저결구복사조성。대처리후적시험차진행조성평개측시，결과표명주요빈솔처적조성봉치강저료5.4 dB(A)～7.5 dB(A)，시험차가사실저빈조성득도유효공제。
A low-frequency noise control method based on modal analysis is proposed. It is applied to a heavy duty truck which has serious booming noise in the cab in idle state. Firstly, the frequency information of the interior noise is obtained through noise testing and FFT analysis. Then the modal analysis of the white-body of the cab is carried out to determine the positions of the modals near the peak noise frequency. The damping treatment is implemented in these positions to reduce the structure-borne noise. Finally, the noise test of the truck after the treatment is carried out to evaluate the effect of this method. The test results show that the peak noise value of the main frequency is reduced by 5.4 dB(A)-7.5 dB(A). Therefore, the low-frequency noise of the cab is controlled successfully.
