caa a22 4500 44581246X CHVBK 20180317145216.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s00419-011-0506-3 doi (NATIONALLICENCE)springer-10.1007/s00419-011-0506-3 A novel method to estimate derailment probability due to track geometric irregularities using reliability techniques and advanced simulation methods [Elektronische Daten] [Saeed Mohammadzadeh, Manie Sangtarashha, Habibollah Molatefi] Track irregularities have a dramatic impact on the response and vibration of a railway vehicle and on the interaction between wheel and rail. The random nature of the track structure and constituent materials and the effects of other factors such as maintenance conditions and transit traffic give rise to the random nature of track irregularities. This research provides a method to estimate the derailment probability of a railway vehicle where track irregularities are assumed to be random, and the interaction of the track and the moving train is considered using advanced dynamic analysis. For this purpose, the limit state function of derailment was estimated using the response surface method and advanced simulation. The probability of derailment was then estimated using a Level 3 reliability method. Springer-Verlag, 2011 Estimation of derailment nationallicence Response surface method nationallicence Derailment nationallicence Saturated design method nationallicence Track-rail interaction nationallicence SIMPACK nationallicence Importance sampling method nationallicence f x ( x ) : Joint probability distribution function for n-dimensional vector of base variables nationallicence G i ( x ) : Limit state function nationallicence Y : Wheel flange force nationallicence Q : Instantaneous load of wheel nationallicence β : Wheel flange angle nationallicence μ : Coefficient of friction between flange rim and rail nationallicence N : Total number of tests for Monte Carlo analysis nationallicence k : Number of observations for G(x)≤ 0 nationallicence G ( x ) : Real limit state function of derailment nationallicence G *( x ) : Approximate limit state function of derailment (response surface function) nationallicence a, b, c, d : Coefficients of response surface function nationallicence x i : Random variables representing track geometric parameters nationallicence n : Total number of random variables nationallicence h v ( v i ) : Joint probability density function of importance sampling nationallicence f x ( v i ) : Main joint density function of random variables nationallicence I ( v i ) : Indicator function with a value of one if x is located in failure region and zero if x is located in safe region nationallicence Mohammadzadeh Saeed School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran aut Sangtarashha Manie School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran aut Molatefi Habibollah School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran aut Archive of Applied Mechanics Springer-Verlag 81/11(2011-11-01), 1621-1637 0939-1533 81:11<1621 2011 81 419 https://doi.org/10.1007/s00419-011-0506-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00419-011-0506-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mohammadzadeh Saeed School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran aut NATIONALLICENCE 700 1- Sangtarashha Manie School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran aut NATIONALLICENCE 700 1- Molatefi Habibollah School of Railway Engineering, Iran University of Science and Technology, Tehran, Iran aut NATIONALLICENCE 773 0- Archive of Applied Mechanics Springer-Verlag 81/11(2011-11-01), 1621-1637 0939-1533 81:11<1621 2011 81 419 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer