1–20 of 237 hits
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    A numerical study of the influence of lateral geometry irregularities on mechanical deterioration of freight tracks

    Karttunen, Kalle / Kabo, Elena / Ekberg, Anders | Tema Archive | 2012
    of the track. This is the scope of the current study where, in particular, the influence on track shift forces and rolling contact fatigue is ...

    Aero-mechanical optimization of a contra-rotating open rotor and assessment of its aerodynamic and acoustic characteristics

    Lepot, I. / Leborgne, M. / Schnell, R. et al. | Tema Archive | 2011
    This article presents a synthesis of Cenaero, DLR, and Onera's joint effort to demonstrate the aerodynamic and acoustic optimization ...

    An investigation into the mechanical damping characteristics of catenary contact wires and their effect on aerodynamic galloping instability

    Stickland, M.T. / Scanlon, T.J. / Craighead, I.A. et al. | Tema Archive | 2003
    the natural frequency and mechanical damping were found to be 1.4 Hz and 0.05 respectively. This information was used to assess the effect of ...

    Influence of system parameters on the stability limit of the undisturbed motion of a motor bogie

    Huang, Caihong / Zeng, Jing / Liang, Shulin | Tema Archive | 2014
    In this article, the stability limit of the undisturbed motion of a simple railway motor bogie whose traction motors are fully suspended on ...

    Bainitic steel grade for solid wheels: metallurgical, mechanical, and in-service testing

    Gianni, A. / Ghidini, A. / Karlsson, T. et al. | Tema Archive | 2009
    compared with conventional pearlitic steel wheels. To improve the wear characteristics, the manufacturing process of bainitic materials needs to be ...

    Wheel-rail impact and the dynamic forces at discrete supports of rails in the presence of singular rail surface defects

    Zhao, X. / Li, Z. / Liu, J. | Tema Archive | 2012
    defects and the resulted high-frequency dynamic forces at the discrete supports of the rail A typical ballasted railway track is modeled, in which ...

    Analysis of the rotation angle of a coupler used on heavy haul locomotives

    Xu, Ziqiang / Ma, Weihua / Wu, Qing et al. | Tema Archive | 2014
    with the rotation behavior of the coupler can exert an adverse effect on the operational safety of trains. This paper analyzes the rotation ...

    A brief historical overview of the fatigue of railway axles

    Smith, R.A. / Hillmansen, S. | Tema Archive | 2004
    The history of railway axle design against fatigue is reviewed through a discussion of several notable accidents caused by broken axles ...

    The effect of geometric features on multi-axial fatigue behaviour of aluminothermic rail welds

    Salehi, Iman / Mutton, Peter | Tema Archive | 2012
    as a result of surface defects or harsh geometric features in the presence of high axle loads and tractive forces gives rise to the so-called ...

    Effects of polarity on the friction and wear of collector shoes deployed in a metro traction system

    Dong, Lin / Zhong, Wen / Chen, Guang Xiong et al. | Tema Archive | 2014
    The effects of current density and polarity on the tribology characteristics of the contact between an aluminium/stainless steel composite ...

    Experimental study of convective heat transfer at the surface of a rail due to train passage

    Wang, Mian / Zhang, Yong-Heng / Bai, Jun et al. | Tema Archive | 2015
    Frictional heat is generated when a train wheels pass over the rail. In addition heat is also generated by the use of an eddy current brake ...

    Stiffness and strength aspects In the design of automotive coil springs for McPherson front suspensions: A case study

    Bartolozzi, R. / Frendo, F. | Tema Archive | 2011
    The current paper deals with the elastic and stress analysis of a side-load spring, which is employed in cars belonging to the medium ...

    Comparison of dynamic effects of high-speed traffic load on ballasted track using a simplified two-dimensional and full three-dimensional model

    Nguyen, K. / Goicolea, J.M. / Galbadon, F. | Tema Archive | 2014
    three-dimensional multibody finite-element model. The vehicle and track are coupled via a nonlinear Hertz contact mechanism. The method of ...

    An investigation of the effects of corrosion on the fatigue strength of AlN axle steel

    Beretta, S. / Carboni, M. / Lo Conte, A. et al. | Tema Archive | 2008
    Corrosion fatigue is an important topic in the evaluation of the structural integrity of railway axles. In fact, several recent axle ...

    Prediction of the press-fit curve in the assembly of a railway axle and wheel

    Benuzzi, D. / Donzella, G. | Tema Archive | 2004
    A methodology for the prediction of the press-fit curve in the assembly of a railway axle and wheel is described. It starts from friction ...

    Large-eddy simulation of aircraft wake vortex deformation and topology

    Hennemann, I. / Holzäpfel, F. | Tema Archive | 2011
    significantly longer than anticipated by todays standard regulations of air traffic control. On the other hand, the initially counterrotating, parallel ...

    Large eddy simulation of the flow around a train passing a stationary freight wagon

    Liu, Yebo / Hemida, Hassan / Liu, Zhiming | Tema Archive | 2014
    In this paper, the effect of track spacing on the aerodynamic performance of a stationary double-stacked freight wagon passed by a high ...

    Identification of wheel-rail contact forces based on strain measurements, an Inverse scheme and a finite-element model of the wheel

    Ronasi, Hamed / Johannson, Hakan / Larsson, Fredrik | Tema Archive | 2014
    strains and corresponding computed strains from a three-dimensional finite-element model of the wheel. The inverse method is compared with the ...

    The aerodynamics of freight: approaches to save fuel by optimising the utilisation of container trains

    Beagles, Adam E. / Fletcher, David I. | Tema Archive | 2013
    Aerodynamic drag is approximately proportional to speed squared so the drag of slower moving freight trains has received less attention ...
    Keywords: USA (United States of America)

    The effect of friction modifiers on wheel/rail isolation at low axle loads

    Hardwick, Christopher / Lewis, Stephen / Lewis, Roger | Tema Archive | 2014
    Signalling block occupancy is triggered by the wheelset of a rail vehicle 'shunting' the track circuit. The main cause of loss of shunting ...