车致振动作用下站房结构的舒适度分析与减振措施

发布时间：2018-01-11 22:16

本文关键词：车致振动作用下站房结构的舒适度分析与减振措施　出处：《西南交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来,随着铁路运输需求的日益增大以及人们对铁路运输安全性、舒适性要求的提升,一大批现代化大型铁路枢纽客站开始涌现。新建铁路站房多采用高架线上候车方式为旅客带来便利,但是同时由于高架候车厅跨度大、柔度小,导致在列车正线通过站房下方时,振动经由土体和结构柱等传递到候车厅楼板,给候车旅客带来不适感。因此,研究铁路站房结构在列车行驶激励下的振动舒适度和振动控制具有十分重要的理论和实际意义。本文以哈齐客专铁路枢纽客站大庆西站站房结构为研究对象,对站房结构在不同正线通过列车行驶激励下站房结构的振动响应规律进行了分析,对站房结构的振动舒适度进行了评价,并提出控制楼板振动的减振措施。论文主要完成了以下四个方面的工作。(1)讨论分析了振动舒适度分析的基本问题与方法,对比了国际标准、中国标准、美国标准、英国标准、丹麦标准以及日本标准中振动舒适度的评价方法与评价指标,结合铁路站房的特殊性,确定选用中国标准中4b类别环境的振动容许值作为本文振动舒适度的评价指标。(2)采用现场实测的方式,分析并总结了不同列车过站时场地土以及站房结构振动的传播和衰减规律。根据本文振动舒适度评价方法和评价指标分析得出,在客车和空载货车过站时,候车厅楼板振动舒适度在容许值以内,而当重长货车过站时,候车厅楼板振动舒适度均大幅超限,且楼板振动的卓越频率集中在6.3Hz附近。(3)结合测试结果,采用有限元方法,分析了列车行驶激励下上部结构的振动响应,并基于有限元方法评价了候车厅楼板的振动舒适度。(4)针对重长货车正线通过站房时引起的振动舒适度超标问题,本文采用TMD系统对候车厅楼板进行减振,计算表明,当每跨楼板的TMD系统质量比为0.1时,减振系统能将楼板振动控制在容许值以内,插入损失达到了!3dB-17dB,减振量达到了15%甚至以上。
[Abstract]:In recent years, with the increasing demand for railway transportation and the improvement of safety and comfort requirements of railway transportation. A large number of modern railway hub passenger stations began to emerge. The new railway stations mostly use the way of waiting on the elevated line to bring convenience to passengers, but at the same time because of the large span of the elevated waiting hall, the flexibility is small. As a result, the vibration is transmitted to the floor of the waiting hall through soil and structural columns when the main line of the train passes through the station room, which brings discomfort to the waiting passengers. It is of great theoretical and practical significance to study the vibration comfort and vibration control of railway station structure under the train driving excitation. This paper takes Daqing West Station as the research object. This paper analyzes the vibration response law of the station room structure under the excitation of different main lines running through the train, and evaluates the vibration comfort degree of the station room structure. The main work of this paper is as follows: 1) the basic problems and methods of vibration comfort analysis are discussed and analyzed, and the international standards and Chinese standards are compared. American standard, British standard, Danish standard and Japanese standard of vibration comfort evaluation method and evaluation index, combined with the particularity of railway station building. The vibration allowable value of 4b environment in Chinese standard is chosen as the evaluation index of vibration comfort degree in this paper. This paper analyzes and summarizes the propagation and attenuation law of site soil and structural vibration of station house when different trains cross the station. According to the evaluation method and evaluation index of vibration comfort degree in this paper, it is concluded that when the passenger car and empty truck pass the station. The vibration comfort of the waiting hall floor is within the allowable value, and when the heavy truck passes the station, the vibration comfort of the waiting hall floor is greatly exceeded. And the excellent frequency of floor vibration is concentrated in the vicinity of 6.3Hz.) combined with the test results, the vibration response of the superstructure under train driving excitation is analyzed by using the finite element method. Based on the finite element method, the vibration comfort degree of the waiting hall floor is evaluated. 4) aiming at the problem of the vibration comfort exceeding the standard caused by the heavy truck main line passing through the station room. In this paper, the TMD system is used to reduce the vibration of the waiting room floor. The calculation shows that when the mass ratio of the TMD system of each span floor is 0.1, the vibration reduction system can control the floor vibration within the allowable value. Insert loss! 3 dB-17 dB, the damping capacity reached 15% or more.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U211.3;TU311.3

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