首页|高铁箱梁桥顶板纵向加筋对其声振特性的影响

高铁箱梁桥顶板纵向加筋对其声振特性的影响

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伴随着高速铁路箱梁桥的大规模建设,列车经过时引起的高架桥低频声辐射问题已成为限制其发展重要因素之一.为了缓解列车经过箱梁桥时的声辐射问题,有必要开展桥梁降噪措施研究.以高速铁路箱梁桥为研究对象,对箱梁桥顶板增设纵向筋板,采用多体系统动力学软件UM及有限元-边界元方法建立车辆-轨道-桥梁耦合动力学模型和声学预测模型,对原结构箱梁桥和加筋板箱梁桥的振动加速度、辐射声功率、线性声压级和声场分布等进行分析,研究顶板纵向加筋对箱梁桥声振特性的影响.研究结果表明:增设纵向筋板后箱梁桥各个板件振动加速度都明显减小,在顶板处减幅最大;增设纵向筋板后箱梁桥的辐射声功率和声压级明显降低,降噪效果良好;其对桥上声场的降噪效果好于桥下和桥侧声场.
Effect of Longitudinal Stiffened Plate on Acoustic Radiation Characteristics of High-speed Railway Box Girder Bridge
With the large-scale construction of high-speed railway box girder bridges,the environmental noise caused by train passing has become one of the important factors restricting their development.In order to solve the problem of low frequency acoustic radiation induced by the trains passing through the box girder bridge,it is necessary to study the noise reduction measures of the box girder bridge.In this work,the high-speed railway box girder bridge with its upper plate reinforced by longitudinal ribs is taken as the research object.The coupling dynamics model of vehicle-rail-bridge and acoustic prediction model are established by using finite element method and boundary element method.The vibration acceleration,radiated acoustic power,linear sound pressure level and acoustic field distribution of the original box girder bridge and the reinforced box girder bridge are analyzed respectively,and the influence of the roof longitudinal reinforcement plate on the acoustic characteristics of box girder bridge is studied.The results show that the vibration acceleration of each plate of the box girder bridge decreases obviously after adding longitudinal ribs,and the amplitude decreases the most at the roof.The radiated sound power and sound pressure level of the box girder bridge are obviously reduced by adding longitudinal reinforcement plates,and the noise reduction effect is good.The effect of noise reduction at the top of the bridge is better than that under the bridge and on the side of the bridge.

vibration and waverail trafficbox girder bridgesteel rib plateacoustic vibration characteristicsvibration noise reduction

王杰、张小安、杨建近、包能能、张晓芸、石广田

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兰州交通大学 机电工程学院,兰州 730070

西南交通大学 牵引动力国家重点实验室列车与线路研究所,成都 610031

振动与波 轨道交通 箱梁桥 筋板 声振特性 减振降噪

国家自然科学基金资助项目甘肃省自然科学基金资助项目甘肃省自然科学基金资助项目中央引导地方科技发展资金资助项目甘肃省教育厅青年博士基金资助项目兰州市科技计划资助项目兰州交通大学青年科学基金资助项目

5236204922JRA34422JR11RA15222ZYIQA0052022QB-0632022-ZD-1312021014

2024

10.3969/j.issn.1006-1355.2024.01.040

噪声与振动控制
中国声学学会

噪声与振动控制

CSTPCD北大核心
影响因子：0.622
ISSN：1006-1355
年,卷(期)：2024.44(1)
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