A study on the critical speed of worn wheel profile using a scale model

Hur, Hyun-Moo; Park, Joon‐Hyuk; You, Won-Hee; Park, Tae-Won

doi:10.1007/s12206-009-0732-6

Cited by 10 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the Newtonian method of dynamics, equations of motions of the model can be expressed as Eqs. (17) As stated earlier, the critical speed can be changed according to the wheel/rail geometry even though other parameters are almost the same [18]. Therefore, it is very important for the stability assessment.…”

Section: Equations Of Motions For Lateral Stability Analysismentioning

confidence: 98%

Parametric study of lateral stability for a railway vehicle

2011

Self Cite

View full text Add to dashboard Cite

This paper deals with the lateral stability for a railway vehicle. Particularly, nonlinear critical speed is investigated via bifurcation analysis. Shooting method and trust region algorithm are applied to calculate the limit cycle of the nonlinear dynamic vehicle model. In case of the investigated vehicle model, the influences of the suspension parameters on the critical speeds are not large. The effects of friction coefficient are also small. However, there is an overall consistency that the nonlinear critical speed is decreased when the stiffness of the suspension is reduced. Study of the excitation conditions where the stable limit cycles occur gives very useful information to understand the nonlinear dynamic behavior of a railway vehicle and to test the vehicle with roller rig test stands. According to the results, the direction of the excitation is very important as well as the amplitude and frequency to acquire accurate nonlinear critical speed.

show abstract

Section: Equations Of Motions For Lateral Stability Analysismentioning

confidence: 98%

Parametric study of lateral stability for a railway vehicle

2011

Self Cite

View full text Add to dashboard Cite

show abstract

“…Another purpose of this study is to validate the control method by comparison of numerical results and test results on a scaled roller rig. It is important for the study to replicate the dynamic characteristics of the full scale model on the scaled model [22]. Particularly, vibration control is closely related to the natural frequency of the system to be controlled.…”

Section: Railway Vehicle Dynamic Response Characteristicsmentioning

confidence: 99%

H_∞ control of railway vehicle suspension with MR damper using scaled roller rig

Shin¹,

You²,

Hur³

et al. 2014

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

In this paper, a magneto-rheological (MR) damper was applied to the secondary suspension to reduce the vibration of a car body. The control performance of the MR damper was verified by numerical analysis with a 1/5 scale railway vehicle model in accordance with the similarity law. The analysis results were then validated in tests. In particular, the objective of the study was to understand how the control performance affected the dynamic characteristics of a railway vehicle and to systematically analyze the relationship between control performance and dynamic characteristics depending on various running speeds. To achieve this, experimental results for the dynamic characteristics of the scaled MR damper designed for the 1/5 scale railway vehicle model were applied to the railway vehicle model. The H∞ control method was applied to the controller. The means of designing the railway vehicle body vibration controller and the effectiveness of its results were studied.

show abstract

“…These authors discuss the causes, consequences and suggest solutions to minimize the problems for several types of wheel and rail wear. Hur and co-workers [14] use a 1/5 scaled roller rig bogie prototype to analyze the influence of the wheel profile wear on the running stability (critical speed) of railway vehicles. Fröhling [15] addresses the asymmetric wheel profile wear and analyses the consequential damages to the wheels, rails, turnouts and bogie components.…”

Section: Introductionmentioning

confidence: 99%

Application of a Computational Tool to Study the Influence of Worn Wheels on Railway Vehicle Dynamics

Pombo¹

2012

JSEA

View full text Add to dashboard Cite

The search for fast, reliable and cost effective means of transport that presents better energy efficiency and less impact on the environment has resulted in renewed interest and rapid development in railway technology. To improve its efficiency and competitiveness, modern trains are required to travel faster, with high levels of safety and comfort and with reduced Life Cycle Costs (LCC). These increasing demands for vehicle requirements imposed by railway operators and infrastructure companies include maintaining the top operational speeds of trainsets during their life cycle, having low LCC and being track friendly. This is a key issue in vehicle design and in train operation since it has a significant impact on the safety and comfort of railway systems and on the maintenance costs of vehicles and infrastructures. The purpose of this work is to analyze how the wear progression on the wheelsets affects the dynamic behavior of railways vehicles and its interaction with the track. For this purpose a vehicle, assembled with new and worn wheels, is studied in realistic operation scenarios. The influence of the wheel profile wear on the vehicle dynamic response is assessed here based on several indicators used by the railway industry. The running stability of the railway vehicles is also emphasized in this study.

show abstract

A study on the critical speed of worn wheel profile using a scale model

Cited by 10 publications

References 11 publications

Parametric study of lateral stability for a railway vehicle

Parametric study of lateral stability for a railway vehicle

H_∞ control of railway vehicle suspension with MR damper using scaled roller rig

Application of a Computational Tool to Study the Influence of Worn Wheels on Railway Vehicle Dynamics

Contact Info

Product

Resources

About

A study on the critical speed of worn wheel profile using a scale model

Cited by 10 publications

References 11 publications

Parametric study of lateral stability for a railway vehicle

Parametric study of lateral stability for a railway vehicle

H∞ control of railway vehicle suspension with MR damper using scaled roller rig

Application of a Computational Tool to Study the Influence of Worn Wheels on Railway Vehicle Dynamics

Contact Info

Product

Resources

About

H_∞ control of railway vehicle suspension with MR damper using scaled roller rig