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H. Hemida¹, E. Stewart² and C. Roberts²

¹School of Civil Engineering, University of Birmingham, United Kingdom
²School of Electronic, Electrical and Systems Engineering, University of Birmingham, United Kingdom

Keywords: railways, switch and crossing, finite element, lock stretcher bar, save envelope.

Abstract

The lock stretcher bar (LSB) is an important component of some types of railway switches in which it plays a major and dynamic role in setting the switch for, and guiding the trains to, the proper route. If the LSB is damaged, deformed or broken then the switching operation cannot be completed. The work presented in this paper is an investigation into the performance of the LSB under several different operational and assembly conditions. Full three-dimensional finite element (FE) simulations have been conducted on an isolated LSB from a short, shallow depth, switch to investigate its performance under various deformations and loads. To validate the FE model, experimental work has been carried out and good agreement was obtained between the measured and computed data. The FE model was then used to obtain the safe envelope of the LSB's operating range. Different proposed new design variations for the LSB have been tested in simulations and their structural performance has been compared with that of the existing designs with significant improvements identified.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	International Journal of Railway Technology ISSN 2049-5358 IJRT, Volume 4, Issue 4, 2015 Finite Element Analysis of the Lock Stretcher Bar in a Railway Switch H. Hemida¹, E. Stewart² and C. Roberts² ¹School of Civil Engineering, University of Birmingham, United Kingdom ²School of Electronic, Electrical and Systems Engineering, University of Birmingham, United Kingdom doi:10.4203/ijrt.4.4.3 purchase the full-text of this paper Full Bibliographic Reference for this paper H. Hemida, E. Stewart, C. Roberts, "Finite Element Analysis of the Lock Stretcher Bar in a Railway Switch", International Journal of Railway Technology, 4(4), 53-71, 2015. doi:10.4203/ijrt.4.4.3 Keywords: railways, switch and crossing, finite element, lock stretcher bar, save envelope. Abstract The lock stretcher bar (LSB) is an important component of some types of railway switches in which it plays a major and dynamic role in setting the switch for, and guiding the trains to, the proper route. If the LSB is damaged, deformed or broken then the switching operation cannot be completed. The work presented in this paper is an investigation into the performance of the LSB under several different operational and assembly conditions. Full three-dimensional finite element (FE) simulations have been conducted on an isolated LSB from a short, shallow depth, switch to investigate its performance under various deformations and loads. To validate the FE model, experimental work has been carried out and good agreement was obtained between the measured and computed data. The FE model was then used to obtain the safe envelope of the LSB's operating range. Different proposed new design variations for the LSB have been tested in simulations and their structural performance has been compared with that of the existing designs with significant improvements identified. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to IJRT purchase this issue (price £80 +P&P)
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