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有砟轨道支承层（UBMs）下原型疲劳强度对铁路交通振动防护效果的影响分析

Analysis of the Influence of Fatigue Strength of Prototype Under Ballast Mats (UBMs) on the Effectiveness of Protection against Vibration Caused by Railway Traffic.

作者信息

Kraśkiewicz Cezary, Zbiciak Artur, Al Sabouni-Zawadzka Anna, Marczak Michał

机构信息

Institute of Roads and Bridges, Faculty of Civil Engineering, Warsaw University of Technology, Al. Armii Ludowej 16, 00-637 Warsaw, Poland.

Institute of Building Engineering, Faculty of Civil Engineering, Warsaw University of Technology, Al. Armii Ludowej 16, 00-637 Warsaw, Poland.

出版信息

Materials (Basel). 2021 Apr 22;14(9):2125. doi: 10.3390/ma14092125.

DOI:10.3390/ma14092125
PMID:33922176
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8122757/
Abstract

The present paper focuses on laboratory tests of fatigue strength of prototype under ballast mats (UBMs), carried out according to the procedure described in the new European standard EN 17282, which was released in October 2020. The mineral wool-based mat revealed significant differences in the values of static and dynamic characteristics, measured before and after the fatigue tests. The elastomeric mats based on recycled materials (SBR granulate and fibers) turned out to have had sufficient durability and effectiveness of protection against vibration caused by railway traffic. The values of static and dynamic bedding moduli, determined before and after the fatigue tests, were used to develop a viscoelastic rheological model of the vibration isolator with the use of fractional derivatives. Using this original model of the ballasted track system with four degrees of freedom, a significant influence of cyclic loading on the level of vibration suppression (insertion loss factor) was demonstrated. The analytical model confirmed that the mats with variations of bedding moduli exceeding 10% should not be used as resilient elements.

摘要

本文聚焦于根据2020年10月发布的新欧洲标准EN 17282所述程序对有碴道床下原型疲劳强度进行的实验室测试。基于矿棉的垫层在疲劳试验前后测量的静态和动态特性值显示出显著差异。基于回收材料（丁苯橡胶颗粒和纤维）的弹性垫层被证明具有足够的耐久性和防护铁路交通引起振动的有效性。疲劳试验前后测定的静态和动态道床模量值被用于通过使用分数阶导数建立隔振器的粘弹性流变模型。使用这个具有四个自由度的有碴轨道系统的原始模型，证明了循环加载对振动抑制水平（插入损耗因子）有显著影响。分析模型证实，道床模量变化超过10%的垫层不应用作弹性元件。

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