噪声与振动控制
譟聲與振動控製
조성여진동공제
Noise and Vibration Control
2015年
5期
87-90
,共4页
声学%结构噪声%NTF分析%声-固耦合模型%阻尼优化
聲學%結構譟聲%NTF分析%聲-固耦閤模型%阻尼優化
성학%결구조성%NTF분석%성-고우합모형%조니우화
acoustics%structure-borne noise%NTF analysis%acoustic-structure coupling%damping optimization
重型商用车驾驶室内噪声主要以中低频结构噪声为主，为确定驾驶室内结构噪声的主要贡献部件，建立重型商用车驾驶室有限元模型，通过实验模态与仿真模态对标，保证有限元模型的准确性。在此基础上利用声学传递路径分析方法，得到对驾驶室结构噪声贡献较大的钣金，并在钣金表面增加沥青阻尼板，通过仿真与实车试验验证，驾驶室内噪声降低1.0 dB(A)～1.5 dB(A)，证明分析方法是正确的，改进措施是有效的。
重型商用車駕駛室內譟聲主要以中低頻結構譟聲為主，為確定駕駛室內結構譟聲的主要貢獻部件，建立重型商用車駕駛室有限元模型，通過實驗模態與倣真模態對標，保證有限元模型的準確性。在此基礎上利用聲學傳遞路徑分析方法，得到對駕駛室結構譟聲貢獻較大的鈑金，併在鈑金錶麵增加瀝青阻尼闆，通過倣真與實車試驗驗證，駕駛室內譟聲降低1.0 dB(A)～1.5 dB(A)，證明分析方法是正確的，改進措施是有效的。
중형상용차가사실내조성주요이중저빈결구조성위주，위학정가사실내결구조성적주요공헌부건，건립중형상용차가사실유한원모형，통과실험모태여방진모태대표，보증유한원모형적준학성。재차기출상이용성학전체로경분석방법，득도대가사실결구조성공헌교대적판금，병재판금표면증가력청조니판，통과방진여실차시험험증，가사실내조성강저1.0 dB(A)～1.5 dB(A)，증명분석방법시정학적，개진조시시유효적。
There are mainly low and medium frequency structural noises in operating heavy-duty commercial vehicle cabs. In this article, to identify the major contributing components which yield such structural noises, a finite element model which assimilates a heavy-duty commercial vehicle was established. Through the benchmarking of experimental modal and simulation modal, precision of the finite element model was verified. On this basis, the acoustic transmission path analysis was used to identify the mental plate which has a large contribution to the structure-borne noise of the cab. Afterwards, an asphalt rubber slab was attached to the surface of the mental plate. Through simulation and a real vehicle test, it was found that the noise in the cab is reduced by 1.0 dB (A)~1.5 dB (A). It is proved that the analysis method is correct and the improvement measure is effective.
