scholarly journals New Method for Realizing Track Irregularities on Railway Vehicle Test Stand

2006 ◽  
Vol 72 (720) ◽  
pp. 2439-2446
Author(s):  
Masakazu ADACHI ◽  
Mitsugi SUZUKI ◽  
Tadanobu IIDA
Keyword(s):  
Test Stand ◽  
New Method ◽  
Railway Vehicle ◽  
Vehicle Test ◽  
Track Irregularities

The new method of initial calibration with the wheel force transducer

Sensor Review ◽  
2014 ◽  
Vol 34 (1) ◽  
pp. 98-109 ◽  
Author(s):  
Dong Wang ◽  
Guoyu Lin ◽  
Wei-gong Zhang ◽  
Ning Zhao ◽  
Han Pang
Keyword(s):  
Force Transducer ◽  
New Method ◽  
Test Results ◽  
Content Type ◽  
Initial Values ◽  
Data Process ◽  
Force Transducers ◽  
Value Determination ◽  
Vehicle Test ◽  
Real Vehicle

Purpose – One of the major shortcomings in the data process of the traditional wheel force transducers (WFTs) is the theoretical errors of initial value determination. A new method to identify the initial values of the WFT for the solution of this problem is proposed in this paper. The paper aims to discuss these issues. Design/methodology/approach – With this method, the initial values can be obtained by equations which are established based on multiple stops on horizontal road. Findings – The calibration and contrast tests on the MTS calibration platform illustrate the better performance with the new method. Moreover, the real vehicle test confirms the effectiveness in practice. Originality/value – The test results show that the new method of initial calibration has an advanced performance compared to the traditional one. In addition, it is effective in the brake test with a real vehicle.

Numerical Simulation of Railway Track Irregularities Based on Stochastic Expansion Method of Standard Orthogonal Bases

2012 ◽  
Vol 178-181 ◽  
pp. 1373-1378 ◽  
Author(s):  
Heng Bin Zheng ◽  
Quan Sheng Yan ◽  
Jun Liang Hu ◽  
Zhou Chen
Keyword(s):  
Numerical Simulation ◽  
Stochastic Process ◽  
Random Variables ◽  
Expansion Method ◽  
Simulation Method ◽  
New Method ◽  
Railway Track ◽  
Independent Random Variables ◽  
Orthogonal Bases ◽  
Track Irregularities

A new simulation method of stochastic process was accepted in the field of simulation for the track irregularities. This method adopted the Hartley orthogonal bases as the standard orthogonal bases. On the basis of the expansion method of stochastic process, and under the condition of ensuring accuracy, it could capture main probabilistic characters of a stochastic process with only a few independent random variables. Through the numerical simulation of the example, it testified the validity and effectiveness of the new method.

scholarly journals On the Critical Points of Vertical Vibration in a Railway Vehicle

2014 ◽  
Vol 61 (4) ◽  
pp. 609-625 ◽  
Author(s):  
Mădălina Dumitriu
Keyword(s):  
Critical Point ◽  
Critical Points ◽  
Vertical Vibration ◽  
Railway Vehicle ◽  
Model Errors ◽  
Structural Vibrations ◽  
Vertical Vibrations ◽  
Correct Estimation ◽  
Bending Modes ◽  
Track Irregularities

Abstract This paper evaluates the level of the vertical vibrations in a railway vehicle carbody generated by the track irregularities and examines the position of the critical point from the comfort perspective. The issue is reviewed on the basis of both a „rigid carbody” model and a „flexible carbody” model, which considers the first two carbody bending modes. The model errors are calculated as a function of the speed behaviour, and the results prove that the comfort performance of a railway vehicle evaluated on the „rigid carbody” model basis are overestimated compared to the ones derived from the implementation of the „flexible carbody” model, mainly at the centre of the carbody. Similarly, a correct estimation of the critical point position in the level of vibrations requires the modelling of the structural vibrations of the vehicle carbody.

Problems on Hunting of Railway Vehicle on Test Stand

1969 ◽  
Vol 91 (3) ◽  
pp. 879-885 ◽  
Author(s):  
T. Matsudaira ◽  
N. Matsui ◽  
S. Arai ◽  
K. Yokose
Keyword(s):  
Experimental Study ◽  
Field Test ◽  
Model Test ◽  
Effective Means ◽  
Scale Model ◽  
Railway Vehicle ◽  
Stand Test ◽  
Dummy Load ◽  
Roller Rig ◽  
Vehicle Test

The stand test in which a vehicle is set on a roller rig to simulate its running state is available as one of the effective means for experimental study on the hunting of vehicle. Here several questions arise: Whether or not a scale model test can substitute for an actual vehicle test; whether or not a bogie with a dummy load can represent a whole car in a stand test; and whether or not a stand test produces a similar result to a field test. The present paper summarizes the results of the studies about these questions conducted at the Railway Technical Research Institute of the Japanese National Railways.

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