Abstract:

A series of models of high-speed trains, including the dynamic coupling model of vehicle and track, the finite element model of train body and the acoustical boundary element model of passenger room, were established. Then, the noise distribution in the passenger room caused by track irregularity was calculated. Moreover, the panel contribution to the highest acoustic pressure in the passenger room was analyzed using the technology of acoustic transfer vector. The results show that, at the speeds of 200 and 300 km/h, the noises at sound level A in the pa- ssenger room vary within the ranges of 62.6 - 66.7 dB and 65.2 - 71.1 dB, respectively ; and that, in order to re- duce the noise at the point with the highest acoustic pressure in the passenger room, some measures should be adopted at the door on the back wall and at the third panel on the floor.

Key words: high-speed train, wheel-rail excitation, acoustic transfer vector, noise prediction, contribution analysis