岩土力学2024，Vol.45Issue(1)：284-301,18.DOI:10.16285/j.rsm.2022.1822
铁路路基动力响应的2.5D有限元方法研究现状及展望
Current situation and prospects of 2.5D finite element method for the analysis of dynamic response of railway subgrade
摘要
Abstract
The 2.5D finite element method is a frequency-domain method that offers advantages such as high computing efficiency and low memory consumption.Over the past two decades,continuous improvements have been made to this method,enabling it to accurately describe the dynamic response of railway subgrades by considering complex soil constitutive relationships and geometric characteristics.Through advancements in load input methods,modeling strategies,and wave absorption boundaries,the accuracy of the 2.5D finite element method has been steadily improved.The 2D interpolation method has also been employed to enhance computational efficiency for random dynamic responses of subgrades.As a result,the 2.5D finite element method has become a commonly used approach in the study of dynamic responses of railway subgrades.To provide a comprehensive understanding of the development of the 2.5D finite element method in researching the dynamic response of railway subgrades,this paper summarizes the current development status from various perspectives,including load input,subgrade system,response output,and improvements in calculation accuracy and efficiency.The paper also addresses bottleneck problems and proposes corresponding solutions.Based on these findings,further discussions and prospects are presented regarding the algorithm's accuracy and efficiency,as well as the research objectives and content.This paper serves as a valuable reference for future research endeavors,offering insights into the advancements of the 2.5D finite element method in studying the dynamic response of railway subgrades.关键词
2.5D有限元方法/铁路路基/动力响应/建模/吸收边界/二维插值Key words
2.5D finite element method/railway subgrade/dynamic response/modeling/absorbing boundary/2D interpolation分类
建筑与水利引用本文复制引用
王瑞,胡志平..铁路路基动力响应的2.5D有限元方法研究现状及展望[J].岩土力学,2024,45(1):284-301,18.基金项目
国家自然科学基金(No.42077248) （No.42077248）
陕西省自然科学基础研究计划(No.2022JQ-435) （No.2022JQ-435）
陕西省城市地质与地下空间工程技术研究中心开放课题(No.2022KT-02).This work was supported by the National Natural Science Foundation of China(42077248),the Natural Science Foundation of Shaanxi Province(2022JQ-435)and the Open Research of Urban Geology and Underground Space Engineering Technology Research Center of Shaanxi Province(2022KT-02). （No.2022KT-02）
