Research on ballast settlement behavior of curved railway track

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04572
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 22020:Structure engineering and earthquake engineering-related
• Research Institution: Niigata University
• Principal Investigator: Koro Kazuhiro 新潟大学, 自然科学系, 教授 (70361912)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: バラスト道床沈下 / 曲線軌道 / 車輪・軌道系連成振動 / 弾塑性有限要素法 / cyclic densification モデル

Outline of Final Research Achievements

We developed a FE-based simulation method for ballast settlement of curved railway track in consideration of track vibration. We investigated the mechanism on cyclic deformation of ballast layer in a curved track with cant deficiency or cant excess, through the numerical tests using the simulation method. The sensitivity of the spatial variation of material- or shape parameters of ingredients of railway track was evaluated through the ballast settlement- or vibration analysis of ballasted railway track using the stochastic FEM.

Free Research Field

土木工学，応用力学，鉄道工学

Academic Significance and Societal Importance of the Research Achievements

本課題の成果は，軌道曲線部のバラスト道床の繰り返し変形メカニズムの解明，の点から，バラスト軌道保守やバラスト軌道破壊対策の技術的進歩に資する．特に，わが国の急速な人口減少局面においては，速達性・安全性に優れる鉄道の維持のために軌道の維持補修費用の節減が求められており，本研究の成果は軌道保守の合理化の点から，全国の鉄道事業者の経営の持続性と安定性の向上に貢献するものである．