基于可靠性技术和车轨相互作用的铁路板条轨道界面损伤评估

Sheng-yang Zhu, C. Cai, W. Zhai
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引用次数: 35

摘要

摘要基于可靠性技术和车轨相互作用理论,对板条轨道的界面损伤问题进行了评估。首先,建立了包含非线性弹簧-阻尼器单元的车辆与平板轨道耦合动力学模型,对界面损伤进行了仿真。考虑损伤长度、损伤高度、轨垫刚度和水泥沥青砂浆层弹性模量的随机性,结合响应面法(RSM)和车轨系统动态仿真,得到了输入随机变量与输出动态响应之间的显式数学表达式。随后,直接利用响应面函数进行了蒙特卡罗(MC)模拟,进行了概率分析。最后,采用动力响应的放大系数(AF)作为控制指标,建立了损伤评估准则。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Interface Damage Assessment of Railway Slab Track Based on Reliability Techniques and Vehicle-Track Interactions
AbstractThe interface damage as one of the most critical damage issues in railway slab tracks is evaluated in this work on the basis of reliability techniques and vehicle-track interactions. First, a coupled dynamics model of a vehicle and the slab track is developed involving nonlinear spring-damper elements for simulation of the interface damage. Furthermore, considering the random nature of the damage length, the damage height, the rail pad stiffness, and the elastic modulus of cement asphalt (CA) mortar layer, explicit mathematical expressions between the input stochastic variables and output dynamic responses are obtained on the basis of the combination of the response surface method (RSM) and the dynamic simulations of vehicle-track system. Subsequently, Monte Carlo (MC) simulations are performed for the probability analysis by directly using the response surface functions. Finally, by adopting the amplification factor (AF) of the dynamic response as the control indices, the damage assessment criter...
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