scholarly journals Evaluation method for crashworthiness of railway vehicles based on the correlation with the degree of passenger injury

2020 ◽  
Vol 86 (881) ◽  
pp. 19-00249-19-00249
Author(s):  
Tomohiro OKINO ◽  
Keisuke NAGATA ◽  
Keitaro HORIKAWA ◽  
Hidetoshi KOBAYASHI
Keyword(s):  
Evaluation Method ◽  
Railway Vehicles

scholarly journals An evaluation method of preventive renewal strategies of railway vehicles selected parts

2021 ◽  
Vol 23 (4) ◽  
pp. 678-684
Author(s):  
Jakub Lewandowski ◽  
Stanisław Młynarski ◽  
Robert Pilch ◽  
Maksymilian Smolnik ◽  
Jan Szybka ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Current Collector ◽  
Control Limit ◽  
Computational Tool ◽  
The Real ◽  
Railway Vehicles ◽  
Verification Method ◽  
Limit Value ◽  
Simulation Evaluation ◽  
Operational Data

The aim of the work was to develop a method of verification of the preventive renewal strategies, which enables a simulation evaluation of the effects of the application of a specific schedule of inspections of parts that are important in the operation of complex renewable technical objects. Using it requires having an already established schedule of inspections, and the result of applying the method is determined by indicators that assess the usefulness of the strategy, even before implementation. The developed computational tool was used to evaluate the renewal strategy of the current collector contact plates. Based on the real operational data, several renewal intervals were considered, determining the frequency of events involving the plate covering a specific mileage, from exceeding the wear control limit value to the next inspection (replacement). The proposed verification method is an important tool for testing and planning technical inspections for systems and elements with planned wear, and parts are periodically replaced.

Measurement and Analysis of Adhesion Phenomena in High Speed Train

2008 ◽  
Author(s):  
Masanobu Nankyo ◽  
Shin-Ichi Nakazawa
Keyword(s):  
Measurement Technique ◽  
High Speed ◽  
Evaluation Method ◽  
Adhesion Force ◽  
Rolling Speed ◽  
High Speed Train ◽  
Adhesion Coefficient ◽  
Railway Vehicles ◽  
Measurement And Analysis ◽  
Water Lubricant

Performance of acceleration or deceleration of railway vehicles is limited to adhesion force. It is well known that adhesion coefficient between wheel and rail tread has some difficult characteristics; one of them is its descending tendency with the ascent of rolling speed particularly under water lubricant condition. We need to know these characteristics as quantitative descriptions, and arrange them to an easy-to-use way for design of running gear such as powering or braking devices. In this paper, a measurement technique on operating train and an advanced evaluation method of the adhesion coefficients are introduced.

An investigation into evaluation methods for ride comfort of railway vehicles in the case of carbody hunting instability

2020 ◽  
pp. 095440972094911 ◽  
Author(s):  
Jianfeng Sun ◽  
Maoru Chi ◽  
Wubin Cai ◽  
Hongxing Gao ◽  
Shulin Liang
Keyword(s):  
Experimental Data ◽  
Standard Method ◽  
Evaluation Method ◽  
Ride Comfort ◽  
Great Influence ◽  
Evaluation Methods ◽  
Research Topic ◽  
Critical Parameters ◽  
Railway Vehicles ◽  
Peak Value

Ride comfort is a long-standing research topic and has been deeply investigated due to its great influence on evaluating the performances of railway vehicles. Many standards have been proposed to evaluate the ride comfort of the railway vehicles. However, the carbody hunting instability was rarely considered during the evaluation of ride comfort. To face this problem, this paper performs the comparison of various evaluation methods for ride comfort in the case of carbody hunting instability. The Sperling method, Mean Comfort standard method and Continuous Comfort method are introduced and compared focusing on the specific experimental data. The benefits and limitations of these methods are analyzed and the most appropriate evaluation method for the condition of carbody hunting instability is determined. Moreover, making full use of the peak value information, an original evaluation method of ride comfort specifically to the carbody hunting instability is proposed. The critical parameters of the method are compared and discussed to investigate their influences on the evaluation results.

Evaluation of Stability in Railway Vehicles on Basis of Bogie Lateral Acceleration

2015 ◽  
Vol 809-810 ◽  
pp. 1031-1036
Author(s):  
Mădălina Dumitriu ◽  
Camil Crăciun
Keyword(s):  
Dynamic Behavior ◽  
Degrees Of Freedom ◽  
Evaluation Method ◽  
Complex Model ◽  
Lateral Acceleration ◽  
Railway Vehicle ◽  
Lateral Direction ◽  
Railway Vehicles ◽  
Secondary Suspension ◽  
The Stability

The paper focuses on evaluating the stability of the railway vehicle during running on a track horizontal irregularities and investigating the possibilities to improve the dynamic behavior on a lateral direction. The evaluation method for the stability relies on the homologation specifications of the railway vehicles from the perspective of the dynamic behavior included in the UIC 518 Leaflet, where the lateral accelerations of the bogies represent evaluation units for the stability. The lateral accelerations are derived from numerical simulations, developed on a non-linear complex model of the vehicle/track system, where the vehicle is described by a mechanical system with 21 degrees of freedom. The results thus presented outline the possibilities of improving the vehicle stability by adopting the best values of the lateral damping of the secondary suspension or of the lateral stiffness of the primary suspension that will lead to the minimizing of the lateral acceleration in a bogie.

Correlation of ride comfort evaluation methods for railway vehicles

2003 ◽  
Vol 217 (2) ◽  
pp. 73-88 ◽  
Author(s):  
Y-G Kim ◽  
H-B Kwon ◽  
S-W Kim ◽  
C-K Kim ◽  
T-W Kim
Keyword(s):  
Evaluation Method ◽  
Ride Comfort ◽  
Dynamic Performance ◽  
Evaluation Methods ◽  
Railway Vehicles ◽  
Comfort Evaluation ◽  
Vibration Model ◽  
Ride Comfort Evaluation ◽  
Abundant Data ◽  
Comfort Indices

Ride comfort is one of the most important dynamic performance characteristics of railway vehicles and is affected by various factors, such as vibration, acoustic sound, smell, temperature, visual stimuli, humidity and seat design. In general, vibration is known to be a major factor that affects ride comfort. There are many studies on methods for evaluating ride comfort in railway vehicles, and many standards or criteria have been developed and used in many countries. Most of the evaluation methods, however, recommend different evaluation methods and criteria, so users should carefully choose a ride comfort evaluation method and must examine whether it can be applied to their railway vehicles or not. The present study has looked at relationships between several evaluation methods using a vibration model resulting from frequency analysis and statistical analysis of acceleration measurements of railway vehicles. The present vibration model yields abundant data for correlation of the ride comfort indices, resulting in reliable relations between the ride comfort indices.

Sign in / Sign up

Export Citation Format

Share Document