The single-axle rolling and vibration test is performed to make the vibration and noise test on the wheelset subject to the rim fault alarm.The test result can clearly reflect the direct impact of the out-of-roundness on the vibration noise of wheelset and the main order of geometric out-of-roundness of wheelset will be presented in the test data as the fundamental frequency and its multiplication.In order to fully study the dynamic and acoustic radiation characteristics of the alarm wheelset in the car level,a car-rail coupling dynamic model and a wheelset acoustic simulation model are established.The measured roughness of wheel surface is used as the input excitation,and combined with test and calculation results,it is found that the dynamic model can reflect the rim fault.In the frequency domain comparison,peaks corresponding to the low frequency bands of 30 Hz,35 Hz,52 Hz and 104 Hz are observed in both the measured and simulated results,which means that the characteristic frequencies of radial defects in wheels from the 9th order and the 17th order which are main orders and the center wavelength of 500 mm can all be reflected in the simulation model.The dynamic impact and the radiated sound pressure amplitude that follow the speed variation are studied and the results indicate that the noise of the current faulty wheelset exceeds the limit.
关键词
铁路客车/车轮失圆/轮对轮辋故障/振动噪声/车辆-轨道耦合系统动力学/振动测试/噪声预测
Key words
railway passenger car/out-of-roundness of wheel/rim fault of wheelset/vibration noise/car-rail coupling system dynamics/vibration test/noise prediction
维普
万方数据