【作者】 艾山丁；

【导师】 谷爱军；

【作者基本信息】 北京交通大学 ， 道路与铁道工程， 2010， 硕士

【摘要】 随着城市轨道交通的发展,人们对生活环境要求的提高给轨道减振技术提出了更高的要求。本文对北京交通大学地下结构实验室雷达2000减振型轨道结构进行了振动测试以及理论仿真计算,讨论各项参数的变化对其动力特性及隔振效果的影响,进而为橡胶隔振无砟轨道结构的国产化研发等工作提供支持。在各项参数中,本文重点讨论不同橡胶隔振支承方式对轨道结构振动特性及隔振效果的影响。本文所做具体工作如下：对橡胶隔振无砟轨道结构进行锤击试验,以确定轨道结构的各项参数取值,从而为后续理论计算模型提供数据支持；以上述轨道结构为原型,建立三维有限元分析模型,对其进行模态分析,讨论该轨道结构在不同参数的影响下其固有频率和振型的变化；根据谐振分析原理,对该轨道结构的传递特性进行分析,讨论该轨道结构在不同参数的影响下其各项动力响应以及隔振效率的变化；根据冲击响应原理,对该轨道结构施加冲击荷载,通过时程分析和频谱分析,讨论该轨道结构在不同参数的影响下其各项动力响应的变化。本文虽然以雷达2000减振型轨道结构为原型进行分析,但本文研究结果对于其他质量—弹簧减振型轨道结构同样具有参考价值。更多还原

【Abstract】 With the development of the urban transit system, more and more concerns are placed on the vibration isolation technology of rail transit structures. Through the dynamic tests on the Rheda 2000 vibration isolation track structure in the Underground Engineering Laboratory in Beijing Jiaotong University and the theoretical simulation analysis, this dissertation discussed the influence of change of different parameters, especially the parameter of different rubber vibration isolation bearings, on the dynamic property and the vibration isolation effect of the slab track, which can further contribute to developing the slab track with rubber vibration isolation bearing on our own. The concrete work is as follows:First, hammer excitation test based on impact method is used for the dynamic test of the Rheda 2000 vibration isolation track structure in order to determine the parameters. Second, a 3D finite element model is built based on the prototype of the mentioned slab track above to modal analyze the former structrue, which performed to obtain the natural frequencies and the vibration modes of the slab track with different paramenters. Third, the transfer property is analysed based on the resonant principle to discuss the dynamic responses and the vibration isolation effect of the slab track with different parameters. Finally, according to the impulse principle, the dynamic responses of the slab track under an impact load with different track parameters are studied from both the time-history and spectrum analyses perspectively. Although this dissertation is based on the Rheda 2000 track system, this study result provides some reference value for other mass-spring vibration isolation track systems.更多还原