Estimation of train derailment probability using rail profile alterations

Structure and Infrastructure Engineering (Impact Factor: 1.45). 11/2012; 8(11):1034-1053. DOI: 10.1080/15732479.2010.500670

ABSTRACT Investigation of train derailment is a complicated job that occurs in special points with special characteristics. It depends on several variables so for successful predication, exact estimation of all effective parameters is required. Instead of this complicated job, usually a time history of variables and statistic distribution can be used. According to statistic distributions, exact determination of train derailment is practically impossible and therefore a probability function should be utilised. Angle of wheel flange, friction coefficient, axle load and train speed are effective parameters in investigation of train derailment probability. In this paper, by using statistical distributions, aforementioned parameters are investigated and derailment probability is calculated using reliability theory. To describe extra capabilities of model, derailment probability is calculated in three different curves of railway network considering real geometrical specifications of curves, amount of wear in rail profiles measured by EM120 track recording cars, axle load and operation speed.

1 Follower
86 Reads
  • [Show abstract] [Hide abstract]
    ABSTRACT: The optimal decisions to maintain or improve the reliability and functionality of structures and infrastructure systems can only be achieved through proper integrated management planning in a life-cycle comprehensive framework. Structure and Infrastructure Engineering (SIE) is an international journal dedicated to recent advances inmaintenance, management, and life-cycle performance of a wide range of infrastructures. The purpose of this article is to provide a brief review of the recent research accomplishments in the field of design, maintenance, life-cycle management, and optimisation of structures and infrastructures reported in papers published in SIE during the period 2005–2011. The papers are categorised under main topics and very briefly discussed.
    Structure and Infrastructure Engineering 01/2012; 8(1):1-25. DOI:10.1080/15732479.2011.628962 · 1.45 Impact Factor
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Spring clips type Vossloh SKL14 (fastening system of track) are vulnerable to fatigue damage in lifetime due to excitations caused by traffic loads. This article has tried to develop a method for reliability analysis of spring clips type SKL14, based on fracture mechanics approach. First of all, a linear dynamic analysis of track has been done for dynamic response calculations under various traffic loads. The displacement time histories are applied on finite element method of type Vossloh SKL14 to achieve cyclic stresses. The equivalent stress range is described by lognormal distribution. Then, fracture reliability analysis has been done for crack propagation assessment in spring clip based on Paris’s law. This fatigue crack growth is dominated by a Mode I mechanism. A linear limit state function based on fracture mechanics is derived in terms of random variables. First-order reliability method has been employed for reliability estimation. At the end, the influence of various random variables on overall probability of failure has been studied through sensitivity analysis.
    Proceedings of the Institution of Mechanical Engineers Part O Journal of Risk and Reliability 03/2014; 228(5). DOI:10.1177/1748006X14527926 · 0.86 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: SUMMARY This paper deals with the dynamic response of infinite double Euler–Bernoulli beam supported by elastic foundation with stochastic stiffness subjected to an oscillating moving load, which is the first research in relevant literature review. In this matter, equations of motion for double beam are formulated in a moving frame of reference. Moreover, by employing the first order perturbation theory and calculating contour integration, the response of double beam is obtained analytically and validated by a stochastic finite element model. Sensitivity analyses on the various parameters of closed form solution such as velocity, load frequency, coefficient of variation of soil foundation and rail and slab bending stiffness show the significant effect of load frequency on the dynamic response of the doubled beam. From practical point of view, the obtained results of the present study can be utilized efficiently in analysis and design of slab track systems. Copyright © 2013 John Wiley & Sons, Ltd.
    International Journal for Numerical and Analytical Methods in Geomechanics 04/2014; 38(6). DOI:10.1002/nag.2227 · 1.38 Impact Factor
Show more