CRTS Ⅲ型板和双块式无砟轨道振动噪声特性研究

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国家科技期刊平台
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中文摘要：[目的]探究高速铁路CRTS Ⅲ型板和双块式无砟轨道的结构振动与噪声特性.[方法]以有限元、多体动力学与边界元相结合的方法为基础,通过建立高速列车-无砟轨道-箱梁耦合动力学模型和边界元模型,研究列车高速通过时的列车-轨道-箱梁耦合系统的结构动力响应,以及噪声辐射特性.[结果]结果表明,列车通过桥上CRTS Ⅲ型板与双块式轨道结构段时,列车的最大轮重减载率分别为0.053 6与0.165 7,下部箱梁挠度分别为1/9 673与1/8 457.与双块式无砟轨道相比,CRTS Ⅲ型板的轨道板及底座位移响应更小,并且轨道-箱梁系统的竖向振动衰减更快,减振性能更优.另外,比较两种轨道结构条件下的高架箱梁结构噪声,CRTS Ⅲ型板段的箱梁噪声总声压级更小.但是,桥下远场点噪声峰值差异较小,峰值频率接近,均为31.5 Hz左右;而桥下峰值频率差异较大,Ⅲ型板的峰值频率为63 Hz,双块式则为20 Hz.[结论]CRTS Ⅲ型板式无砟轨道更适合在高速铁路桥梁段使用.

外文标题：Investigation of Vibration and Noise Characteristics in CRTS Ⅲ Plate and Double-block Ballastless Track

外文摘要：[Objective]In order to explore the structural vibration and noise characteristics of high-speed railway CRTS Ⅲ type plates and double block tracks.[Method]Based on the method of finite element,multi-body dy-namics and boundary element,the dynamic model and boundary element model of high-speed train-ballastless track-box girder coupling system are established to study the structural dynamic response and noise radiation characteristics of the train-track-box girder coupling system.[Result]The results show that the maximum wheel load reduction rate of the train is 0.053 6 and 0.165 7,and the deflection of the lower box girder is 1/9 673 and 1/8 457,respectively,when the train passes the CRTS Ⅲ plate and the double-block track structure section on the bridge.Compared with the double-block ballastless track,the displacement response of the track plate and the base of the CRTS Ⅲ plate is smaller,and the vertical vibration attenuation of the track-box girder system is faster,and the vibration damping performance is better.In addition,the total sound pressure level of the box gird-er noise of CRTS Ⅲ segment is lower than that of the two types of track structure.However,the difference be-tween the peak noise of the far field point under the bridge is small,and the peak frequency is similar,both of which are about 31.5 Hz.The peak frequency under the bridge has large differences,the peak frequency of type Ⅲ board being 63 Hz,and the double block type being 20 Hz.[Conclusion]CRTS Ⅲ plate type ballastless track is more suitable for use in high-speed railway bridge sections.

外文关键词：

ballastless trackbox girdervehicle-rail-bridge couplingvibrationstructural noise

作者：

罗锟、王凯新、甄慧杰、陈鹏

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作者单位：

华东交通大学铁路环境振动与噪声教育部工程研究中心,江西南昌 330013

华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,江西南昌 330013

关键词：

无砟轨道箱梁车-轨-桥耦合振动结构噪声

基金：

国家自然科学基金项目国家自然科学基金项目江西省自然科学重点基金项目江西省科技专项江西省教育厅课题轨道交通基础设施性能监测与保障国家重点实验室自主课题

项目编号：

521784245186802320224ACB20401820223AEI91004GJJ2205122HJGZ2023207

出版年：

2024

华东交通大学学报

华东交通大学

华东交通大学学报

CSTPCD

影响因子：0.748

ISSN：1005-0523

年,卷(期)：2024.41(3)