The Improvement of Incompatible Sliding Contact Problem Using Mesh Refinement And Its Application to Railway Skewed Culvert Problem

Chan-Yong Choi; In-Ho Yeo; Keun-Young Chung; Gye-Hee Lee

doi:10.7734/COSEIK.2017.30.5.435

All Issue

2017 Vol.30, Issue 5 Preview Page Next Page

The Improvement of Incompatible Sliding Contact Problem Using Mesh Refinement And Its Application to Railway Skewed Culvert Problem 요소 세분화를 이용한 비적합 미끄러지는 접촉문제의 개선과 철도 사각암거 문제에의 적용

2017. pp. 435-444

PDF XML

Abstract

The vehicle-track structure dynamic interaction analysis problem can be treated as sliding contact problem, and it is assumed that vehicle run at a constant speed over a rail modeled as beam elements. Unfortunately, Salome-Meca can not satisfy the compatibility condition for the beam master elements, which are consist of the elements with higher order polynomial shape function, in sliding contact problem. In this study, it is suggested to use more finer beam master element mesh as the remedy for incompatibility in sliding contact problem, and the accuracy of the solution is secured. For this, the effect of beam element mesh refinement consisting runway is analysed through simple examples, and the applicability to the dynamic interaction analysis is evaluated. Finally, the dynamic interaction analysis of railway skewed culvert transition problem is carried out to evaluate the effect of supporting stiffness due to backfill pattern changes and track irregularity due to uneven subgrade settlement.

Keywords

dynamic interaction analysis

salome-meca

sliding contact

track structure

skewed culvert transition

차량-궤도 구조물 동적 상호작용해석은 차량의 접촉점이 보요소로 모형화된 레일 위를 일정한 속도로 주행하는 미끄러지 는 접촉문제로 취급하였다. 하지만 Euler 보와 같은 고차 다항식의 형상함수가 적용된 유한요소를 사용할 경우 미끄러지는 접촉문제에서 적합조건을 만족하지 못한다. 이 연구에서는 유한요소해석프로그램이 미끄러지는 접촉문제에서의 적합조건을 만족시키지 못하는 것에 대한 해결법으로 주행로를 이루는 보요소를 보다 세분화하여 동적상호작용해석에서의 정확성을 확 보하고자 하였다. 이를 위해 간단한 예제들을 통해 주행로를 이루는 보요소의 세분화 정도에 따른 동적상호작용해석의 거동 을 분석하였으며, 해석 프로그램의 동적상호작용해석에의 적용성을 평가하였다. 마지막으로 사각을 갖는 철도 암거 접속부 의 뒷채움재 설치 형식에 따른 차량주행시의 거동을 평가하기 위하여 동적상호작용해석을 수행하고, 접속부 뒷채움재 형식 의 변경에 따른 지지강성의 변화에 의한 영향과 노반침하에 따른 궤도틀림의 영향을 비교분석하였다.

키워드

동적상호작용해석

Salome-Meca

미끄러지는 접촉

궤도 구조물

사각을 갖는 암거 접속부

References

References

JP Aubry, Beginning with Code_Aster, A Practical Introduction to Finite Element Method using Code_Aster Gmsh, and Salome, Framabook. (2013)

SL Choi, YS Lee, SH Kim and BS Kim, J. Comput. Struct. Eng. Inst. Korea, Verified 20-car Model of High-speed Train for Dynamic Response Analysis of Railway Bridges, 15(4); 693-702 (2002)

KY Chung and H Koh, J. Korean Soc. Railway, Dynamic Interaction Analysis of Tilting Train and Curved Track, 15(2); 162-171 (2012)

KY Chung, SU Lee and KJ Min, J. Korean Soc. Civil Eng, Simulation of Vehicle-Structure Dynamic Interaction by Displacement Constraint Equations and Stabilized Penalty Method, 26(4D); 671-678 (2006)

AT Dharmit, Finite Element Analysis using Open Source Software, Moonish Enterprises Pty Ltd. (2014)

AT Dharmit, Intermediate Finite Element Analysis with Open Source Software, Moonish Enterprises Pty Ltd. (2014)

D Guillaume and H Patrick, Numerische Mathematik, An Accurate Local Average Contact Method for Nonmatching Meshes, 136(2); 467-502 (2017)

10.1007/s00211-016-0846-6

JH Kim, Earthquake Response Analysis of High-speed Railway Vehicles, Master Thesis, KAIST. (2000)

MC Kim, J. Comput. Struct. Eng. Inst. Korea, Development of a Quasi-Three Dimensional Train/Track/Bridge Interaction Analysis Program for Evaluating Dynamic Characteristics of High Speed Railway Bridges, 16(2); 147-152 (2003)

MY Kim, MH Lim, SD Kwon, HK Kim and NI Kim, J. Comput. Struct. Eng. Inst. Korea, Dynamic Interaction Analysis of Vehicle-Suspension Bridge Considering Flexural and Torsional Behaviors and Shear Deformation Effects, 18(4); 361-372 (2005)

Korea Railroad Research Institute, A Study of Development of KR Design Code for Transitional Zone between Earthwork and Bridge and Design/construction in Box Structure (2006)

Korea Railroad Technical Corporation, Track Maintenance Standards, Civil Engineering Division (2011)

Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 30
No :5
Pages :435-444
Received Date : 2017-08-08
Revised Date : 2017-08-22
Accepted Date : 2017-08-23
DOI :https://doi.org/10.7734/COSEIK.2017.30.5.435

Journal of the Computational Structural Engineering Institute of Korea ISSN:1229-3059(Print) 2287-2302(Online) 한국전산구조공학회 논문집

All Issue

References