Optimization design of acoustic radiation for S-form web plate wheel

In order to reduce the vibration noise produced by the wheels of running train,wheel structure dynamics optimization principle was applied to wheel structure section optimization design.By means of finite element numerical simulation method and boundary element acoustic simulation method,railway train low-noise wheel acoustic radiation optimization model,which took wheel structure acoustic radiation power as objective function,was built.Using structure vibration acoustic radiation optimization theory and multi-parameter highly efficient optimization GA(genetic algorithm)method,the solution of model was programed successfully.Compared to standard wheel,optimized wheel plate vibration reduction is more obvious,for which the maximum vibration acceleration amplitude reduces from 209.2 m·s-2 to 194.6 m·s-2.According to wheel acoustic radiation power,optimized wheel acoustic radiation power decreases within most frequency ranges.The most obvious reductions are 2.31dB and 2.42dB at 1 200Hz and 3 200Hz,respectively.Analysis result indicates that it is available to optimize wheel by GA,and it provides a way for the vibration and noise reduction of vehicle.1 tab,13 figs,16 refs.