Computational Technology Resources - IJRT

H. Takahashi¹, K. Abe², F. Urakawa³ and K. Koro³

¹Graduate School of Science and Technology, Niigata University, Japan
²Department of Civil Engineering and Architecture, Niigata University, Japan
³Railway Technical Research Institute, Kokubunji, Japan

doi:10.4203/ijrt.7.4.2

download the full-text of this paper

H. Takahashi, K. Abe, F. Urakawa, K. Koro, "The Influence of Thermal Dependency of Pad Stiffness on the Measurement of Rail Axial Load based on a Vibration Method", International Journal of Railway Technology, 7(4), 23-43, 2018. doi:10.4203/ijrt.7.4.2

Keywords: continuous welded rail, rail axial load, pinned–pinned mode, resonant frequency, pad stiffness, thermal dependency, identification..

Summary

A measuring method of rail axial load based on vibration modes is discussed. In particular, the influence of the thermal dependency of rubber pads on the natural frequency of the pinned–pinned mode is considered. To this end, in the numerical track model a rotational spring depending on the temperature is attached at each rail support. The identification of the temporal equivalent rotational stiffness reflecting the rail pad and fastener is then attempted. Numerical results show that the identification using the ratio of bending moment to rotation angle of rail measured around the rail support has the best performance. In this case, the measurement with an error of 0.1% is required to assure the identification accuracy of ±50kN.

download the full-text of this paper (PDF, 21 pages, 556 Kb)

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)

	Computational & Technology Resources an online resource for computational, engineering & technology publications
	not logged in - login
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 7, Issue 4, 2018 The Influence of Thermal Dependency of Pad Stiffness on the Measurement of Rail Axial Load based on a Vibration Method H. Takahashi¹, K. Abe², F. Urakawa³ and K. Koro³ ¹Graduate School of Science and Technology, Niigata University, Japan ²Department of Civil Engineering and Architecture, Niigata University, Japan ³Railway Technical Research Institute, Kokubunji, Japan doi:10.4203/ijrt.7.4.2 download the full-text of this paper Full Bibliographic Reference for this paper H. Takahashi, K. Abe, F. Urakawa, K. Koro, "The Influence of Thermal Dependency of Pad Stiffness on the Measurement of Rail Axial Load based on a Vibration Method", International Journal of Railway Technology, 7(4), 23-43, 2018. doi:10.4203/ijrt.7.4.2 Keywords: continuous welded rail, rail axial load, pinned–pinned mode, resonant frequency, pad stiffness, thermal dependency, identification.. Summary A measuring method of rail axial load based on vibration modes is discussed. In particular, the influence of the thermal dependency of rubber pads on the natural frequency of the pinned–pinned mode is considered. To this end, in the numerical track model a rotational spring depending on the temperature is attached at each rail support. The identification of the temporal equivalent rotational stiffness reflecting the rail pad and fastener is then attempted. Numerical results show that the identification using the ratio of bending moment to rotation angle of rail measured around the rail support has the best performance. In this case, the measurement with an error of 0.1% is required to assure the identification accuracy of ±50kN. download the full-text of this paper (PDF, 21 pages, 556 Kb) 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)
Back to top	©Civil-Comp Limited 2023 - terms & conditions