傳動(dòng)系扭振引起的車內(nèi)轟鳴聲實(shí)驗(yàn)
[Abstract]:Aiming at the problem of roaring noise in the vehicle with low speed and low speed, the mechanism of the source, the transmission path and the peak value of the roaring sound in the vehicle is analyzed by means of transfer path analysis and modal experiment. The exciting force mainly comes from the torsional alternating moment at the input end of the main reducer. The torsional alternating moment acts on the rear axle in the form of bearing counterforce and transfers to the vehicle. The peak values of 1 102r/min and 1 515r/min are both the result of multiple resonance, but the structure of resonance is different. A variety of measures to reduce the internal noise by reducing the torsional alternating torque are put forward and the comprehensive evaluation is carried out. Some measures which have good effect on noise reduction are verified by experiments. The experimental results show that the method can reduce the noise by up to 15 dB, which provides a new way to solve the similar problems.
【作者單位】: 西南交通大學(xué)機(jī)械工程學(xué)院;中國(guó)北車集團(tuán)唐山軌道客車有限責(zé)任公司;
【基金】:國(guó)家自然科學(xué)基金資助項(xiàng)目(51275426)
【分類號(hào)】:U463.2;U461.4;U467
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