scholarly journals Full Scale Experimental Verification on the Function of Anti-derailing Guard Rails to the Derailments due to Large Earthquakes(Mechanical Systems)

2010 ◽  
Vol 76 (771) ◽  
pp. 3086-3092 ◽  
Author(s):  
Tsutomu MORIMURA ◽  
Masaki SEKI ◽  
Masahiro MIWA ◽  
Kei SAKANOUE ◽  
Hironari MURAMATSU ◽  
...  

Author(s):  
Kazuhiko Nishimura ◽  
Yoshiaki Terumichi ◽  
Tsutomu Morimura ◽  
Masahito Adachi ◽  
Yoshitaka Morishita ◽  
...  

A simulation model is used to calculate the rocking motion of a vehicle and how antiderailing guard rails work to prevent derailment when subject to large ground excitation and the results are verified through full scale testing. (1) The simple vehicle–track model should properly represent the rocking mechanism. (2) The effect of vehicle speed on the wheel/rail slide is also properly represented, thus the wheel/rail creep law model can be applied to the analysis of a running vehicle experiencing large rocking motion. (3) The action of the guard rail was equal in both the simulation and the full scale test, thus indicating that the simple antiderailing guard rail model sufficiently represents the dynamic interaction of the wheel/guard rail and the effect.



2014 ◽  
Vol 19 (3) ◽  
pp. 410-430 ◽  
Author(s):  
Elaina Jennings ◽  
John W. van de Lindt ◽  
Ershad Ziaei ◽  
Pouria Bahmani ◽  
Sangki Park ◽  
...  




2013 ◽  
Vol 486 ◽  
pp. 195-200
Author(s):  
Jaroslav Václavík ◽  
Pavel Polach

The paper was written in the framework of research in mechanisms of the increased mobility on the basis of parallel kinematic structures, for which a fibre control instead of rigid elements is designed. The experiment is focused on the verification of the fibre properties in simplified mechanical systems such as motion on an inclined plane, vibration of a moving weight hanging on a fibre and fibre interaction with two types of pulley. The arrangement and instrumentation of the experimental stand and of the system for the measurement of position and axial forces in a fibre are described. The results should serve for tuning the computational model, the results of which are also presented in the framework of specific experiments.



1988 ◽  
Vol 6 (1) ◽  
pp. 65
Author(s):  
P. Habib ◽  
M.P. Luong ◽  
N.T. Long ◽  
G. Legeay ◽  
L. Baude


Author(s):  
Yong-Yi Wang ◽  
David Rudland ◽  
David Horsley

An ECA procedure specifically tailored to pipeline girth welds is developed under a PRCI (Pipeline Research Council International) funded project. This procedure of FAD (Failure Assessment Diagram) format incorporates some of the most recent developments in crack driving force, plastic collapse, and effects of weld strength mismatch match. The theoretical framework of this procedure is given in a companion paper. This paper focuses on the experimental verification of the procedure. Some particular issues related to girth weld ECA are discussed first. The experimental database includes both full-scale and wide plate test results. Most of the full-scale data are from pipes of API Grade X70 (483 MPa); a few were X65 (448 MPa) and X60 (414 MPa) grades. The diameter of the pipes ranged from 20 inch (508 mm) to 42 inch (1067 mm). The wide plate test data are taken from a PRCI project performed at the University of Gent. The plates were cut from an X60 36-inch OD 11.6-mm pipe. Surface-breaking defects were artificially introduced from the root side of the girth welds. The plates were loaded to failure in tension after the defects were fatigue pre-cracked. The girth welds had a range of yield stress levels ranging from 20% undermatching to 24% overmatching. In almost all the cases, the newly developed procedure proved conservative as compared to the experimental data. The comparison with the wide plate tests was particularly interesting with its wide range of weld strength mismatch levels. It was demonstrated that the inclusion of the weld strength mismatch in the new procedure improves the consistency and the accuracy of the predictions. It also showed that non-conservative predictions might result if the undermatching welds are not properly accounted for.



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