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为降低京沪高速铁路苏州北站候车厅受桥梁振动的影响,拟在正线32m预应力混凝土简支箱梁内安装多重调频质量阻尼器(MTMD)。通过建立车—桥—MTMD竖向动力分析模型,分析MTMD对32m简支箱梁竖向振动特性的影响。计算结果表明,加装MTMD后,32m简支箱梁一阶竖向自振频率有所降低,32m简支箱梁的竖向振动响应明显减小。
In order to reduce the influence of bridge vibration on the waiting hall of Suzhou North Railway Station of Beijing-Shanghai high-speed railway, multi-frequency modulation mass damper (MTMD) is proposed to be installed in the 32 m prestressed concrete box girder. Through the establishment of vehicle-bridge-TMTMD vertical dynamic analysis model, the influence of MTMD on the vertical vibration characteristics of 32m simply supported box girder is analyzed. The calculation results show that the first-order vertical natural frequencies of 32m simply supported box girders decrease with the installation of MTMD, and the vertical vibration response of 32m simply supported box girders decreases obviously.