中文摘要：

研究目的：高速铁路高架桥结构噪声的根源是桥梁在列车荷载作用下产生的频率在20-200 Hz之间的局部振动,而结构噪声经研究从传播途径上控制效果较差,应选用较为精细的方法从其产生根源上着手加以研究。研究结论：基于车辆一轨道耦合动力学原理,利用有限元方法针对高速铁路中所采用的典型箱梁的局部振动问题作了详细的分析求解,选取了具有代表性的6个敏感点,分析了多种工况下的点振动响应,结果表明：（1）工程实际中在满足其他受力条件的前提下,通过改变箱梁顶板的厚度、腹板的厚度都会对控制箱梁局部振动起到可观的效果;（2）由改变腹板倾角分析可知,较小的倾角对结构局部振动具有一定的控制作用,但并不意味着一定要将其设置为0°来控制局部振动,需综合考虑其他因素,取最合适的腹板倾角;（3）该研究结果对高速铁路桥梁工程减振降噪设计具有指导意义。

英文摘要：

Research purposes： The root cause of the structural noise of high - speed railway viaduct is the local vibration which is generated when the train passing through the bridge and the vibration frequency is between 20-200 Hz. We can know from some research it is poor to control the structural noise through the route of transmission. A more sophisticated method should be used to study the origin of the method.Research conclusions： Based on the vehicle - track coupling dynamics, the local vibration of the high - speed railway box girder is analyzed by the Finite Element Method （FEM） in detailed. Six representative sensitive points were selected, and the point vibration response under various conditions was analyzed. The results show： （1） The local vibration can be controlled effectively by changing the thickness of the top plate in the practical engineering, at the same time the form must meet other preconditions. （2） By the analysis of changing the angle of the web, the smaller inclination of the structure has a certain control effect on the local vibration. But it does not mean that it must be set to 0 degrees for controlling the local vibration. Other factors must be taken into consideration to set the most appropriate web inclination. （3） The study results have some guiding significances for the design of vibration and noise reduction of high speed railway bridge engineering.