Analysis of load history characteristic and fatigue life evaluation of railway vehicle bogie frame

2019 ◽  
Vol 7 (2) ◽  
pp. 297-307
Author(s):  
Jung-Won Seo ◽  
Seok-Jin Kwon ◽  
Chan-Woo Lee ◽  
Byeong-Chon Goo ◽  
Hyeong-Jin Kim
Keyword(s):  
Fatigue Life ◽  
Railway Vehicle ◽  
Load History ◽  
Bogie Frame ◽  
Life Evaluation ◽  
Fatigue Life Evaluation

Fatigue Life Evaluation of a Railway Vehicle Bogie Using an Integrated Dynamic Simulation

1994 ◽  
Vol 208 (2) ◽  
pp. 123-132 ◽  
Author(s):  
R K Luo ◽  
B L Gabbitas ◽  
B V Brickle
Keyword(s):  
Fatigue Life ◽  
Design Methodology ◽  
Structural Characteristics ◽  
Integrated Design ◽  
Railway Vehicle ◽  
Bogie Frame ◽  
Stress Evaluation ◽  
Life Evaluation ◽  
Underground Railway ◽  
Fatigue Life Evaluation

An integrated design methodology has been developed for the fatigue life evaluation of railway vehicle bogies. In principle, there are five parts in the procedure: specification and measurement of track irregularities; modelling a railway vehicle and description of rail-wheel profiles; obtaining the railway vehicle suspension load histories; dynamic analysis and stress evaluation of the bogie frame; fatigue life evaluation of the bogie. The whole procedure has been applied to a typical London Underground railway vehicle. The theoretical results have been validated against field test data and fatigue calculations have indicated good agreement with operational data from the actual vehicles. It has been shown that a design methodology for railway vehicle bogies based on the track profiles on which they will run and on their own structural characteristics is possible and can be used at an appropriate stage in the design process.

Fatigue life prediction for locomotive bogie frames using virtual prototype technique

2021 ◽  
pp. 095440972098666
Author(s):  
Ruixian Xiu ◽  
Maksym Spiryagin ◽  
Qing Wu ◽  
Shuchen Yang ◽  
Yanwen Liu
Keyword(s):  
Fatigue Life ◽  
High Speed ◽  
Virtual Prototype ◽  
Railway Vehicle ◽  
Bogie Frame ◽  
Traction Control ◽  
Longitudinal Load ◽  
Heavy Haul ◽  
Fatigue Life Evaluation ◽  
Operational Service

Current research papers use simulated load spectrums to assess bogie frames’ fatigue life but seldom consider traction and braking loads. Traction and braking loads play important roles in predicting fatigue life in high-speed and heavy haul operational scenarios. Hence, there is a research gap in terms of the consideration of longitudinal load spectrums while assessing bogie frames’ fatigue life. This paper presents research about this topic. A virtual prototype technique available in literature has been extended for this purpose; it uses multibody dynamics and finite element techniques to simulate the behaviour of bogie frames under real operational service loads. As a result, the special simulation methodology has been developed in this work and it includes the unique integration of simulation approaches that includes train dynamics, locomotive dynamics with the consideration of a traction control algorithm and the adopted fatigue life calculation method. This paper gives numerical examples of a rigid-flexible coupled dynamic railway vehicle model subjected to longitudinal forces. Road Environment Percent Occurrence Spectrum (REPOS) load spectrums of the bogie frame were developed from a whole-trip train simulation on a real route. The spectrums are then used to predict locomotive the bogie frame’s fatigue life. The results of the bogie frame fatigue life evaluation performed in this paper show that fatigue lives at the roots of traction rod seats under longitudinal load spectrums are shorter than their fatigue life under vertical load spectrums.

A Study on Fatigue Life Evaluation of Pressure Vessel Made of ASME SA240-316L Material Using Numerical Analysis

2019 ◽  
Vol 893 ◽  
pp. 1-5 ◽  
Author(s):  
Eui Soo Kim
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Pressure Vessel ◽  
Life Prediction ◽  
Pressure Vessels ◽  
Physical Damage ◽  
Element Analysis ◽  
Internal Damage ◽  
Life Evaluation ◽  
Fatigue Life Evaluation

Pressure vessels are subjected to repeated loads during use and charging, which can causefine physical damage even in the elastic region. If the load is repeated under stress conditions belowthe yield strength, internal damage accumulates. Fatigue life evaluation of the structure of thepressure vessel using finite element analysis (FEA) is used to evaluate the life cycle of the structuraldesign based on finite element method (FEM) technology. This technique is more advanced thanfatigue life prediction that uses relational equations. This study describes fatigue analysis to predictthe fatigue life of a pressure vessel using stress data obtained from FEA. The life prediction results areuseful for improving the component design at a very early development stage. The fatigue life of thepressure vessel is calculated for each node on the model, and cumulative damage theory is used tocalculate the fatigue life. Then, the fatigue life is calculated from this information using the FEanalysis software ADINA and the fatigue life calculation program WINLIFE.

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