现代制造工程
現代製造工程
현대제조공정
MODERN MANUFACTURING ENGINEERING
2014年
5期
7-9,74
,共4页
微型汽车%异响%声强法%声源识别
微型汽車%異響%聲彊法%聲源識彆
미형기차%이향%성강법%성원식별
mini-car%abnormal noise%sound intensity method%noise source identification
针对某微型轿车存在的怠速异响噪声，在对车内驾驶员耳旁噪声信号进行频谱分析确定异响噪声频率范围的基础上，运用声强法进行噪声源识别试验，结果表明：进气噪声是1000～1200 Hz 频段的主导异响源，转向助力泵是1950～2050 Hz频段的主导异响源。基于P-I指数的验证结果证明了上述结论的正确性，对改善某微型轿车的声学性能具有一定指导意义。
針對某微型轎車存在的怠速異響譟聲，在對車內駕駛員耳徬譟聲信號進行頻譜分析確定異響譟聲頻率範圍的基礎上，運用聲彊法進行譟聲源識彆試驗，結果錶明：進氣譟聲是1000～1200 Hz 頻段的主導異響源，轉嚮助力泵是1950～2050 Hz頻段的主導異響源。基于P-I指數的驗證結果證明瞭上述結論的正確性，對改善某微型轎車的聲學性能具有一定指導意義。
침대모미형교차존재적태속이향조성，재대차내가사원이방조성신호진행빈보분석학정이향조성빈솔범위적기출상，운용성강법진행조성원식별시험，결과표명：진기조성시1000～1200 Hz 빈단적주도이향원，전향조력빙시1950～2050 Hz빈단적주도이향원。기우P-I지수적험증결과증명료상술결론적정학성，대개선모미형교차적성학성능구유일정지도의의。
In order to identify the abnormal noise source of a mini-car under idle condition ,firstly,the frequency spectrum of the noise signal on the side of the driver ’s ear was analyzed and the frequency range of the abnormal noise was determined ,secondly, the noise source identification test based on sound intensity method was conducted .Results show that the intake noise is the domi-nant source in the frequency range of 1 000~1 200 Hz and power steering pump is the dominant noise source in the frequency range of 1 950~2 050Hz.The above results were proved by P-I index,which have important guiding significance on the improve-ment of the car ’ s acoustic performance .
