Squeal noise analysis and damper design of tram elastic wheel
Aiming at the problem of squeal noise when the trams pass through the curve sections,this paper proposes a design method of the noise damper of elastic wheel based on real vehicle data prior.The noise test of a small curve line is carried out for a tram to obtain the corresponding noise dominant frequency,and the finite element model of the elastic wheel is established to analyze the wheel modal corresponding to the noise dominant frequency,so as to determine the design direction of the damper.The dynamic model of the squeal noise damper of elastic wheel is established,and the structure of the noise damper of elastic wheel is designed.The elastic wheel model with damper is established,and the noise reduction effect of damper is studied by acoustic radiation analysis.The results show that compared with the elastic wheel without damper,the radiated noise of the elastic wheel with damper is significantly reduced.The radiated sound power levels at the two squeal noise frequencies are reduced by 8.5 dB and 6.6 dB,respectively,and the total sound power level is reduced by 6.8 dB.Finally,in order to verify the accuracy of the finite element model,the modal test is carried out.The results show that the average error of the first 11 order modal frequencies of simulation is 3.07%,and the model is more accurate and reliable.
万方数据
维普
