When a train runs across a bridge, the bridge is excited by dynamic forces acting on it because of the track irregularities, and the structure-borne noise radiated by bridge raises evidently. To explore the influence of Multiple Tuned Mass Dampers (MTMDs) system on structure-borne noise, a double track simply supported box-girder bridge, with a span of 32 m, was simulated as a case study. Based on the moving forces – bridge – MTMDs coupling vibration model, the optimal MTMDs parameters were derived and calculated from the flexural frequency response function, and then, the vibration and noise control effectiveness were compared with and without MTMDs by applying Finite Element Method (FEM) of transit analysis and Boundary Element Method (BEM) of acoustic, respectively. The results showed that MTMDs is an effective device in reducing dynamic responses of box-girder bridge. However, because of the vibration control of MTMDs aims at the first flexural mode, the reduction of structure-borne noise is not as effective as the vibration, and the average reduction of Sound Pressure Level (SPL) can be about 0.5 dB for the sound filed which is 25 m to the near track.
ZHANG Xun;LI Xiao-zhen;WU Jin-feng;ZHANG Zhi-jun;LI Ya-dong.
Study of MTMDs on the structure-borne noise control of High-speed Railway simply supported box-girder bridge[J]. Journal of Vibration and Shock, 2013, 32(13): 194-200
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