中南大学学报（自然科学版）2024，Vol.55Issue(3)：1241-1251,11.DOI:10.11817/j.issn.1672-7207.2024.03.034
有砟道床人工捣固作业模型建立及力学性能分析
Establishment and mechanical performance analysis of manual tamping operation model for ballast bed
摘要
Abstract
To study the mechanism of the effect of manual tamping operation on the quality state of the track bed,a simulation model of the manual tamping device-ballast bed was established based on the modeling method of coupling of discrete element and multi-body dynamics.The tamping process of workers was effectively simulated,and the correctness of the model was verified through on-site test results.The impact of manual tamping on the stiffness and contact state of the ballast bed was analyzed.The results show that manual tamping operation can reduce the stiffness of the ballast bed.After the operation,the support stiffness is 101.85 kN/mm,reducing by 28.48%,and the rebound stiffness is 206.77 kN/mm,reducing by 9.02%.During the tamping and vibrating stages,the contact state between the ballast changes,with the increasing number of contact between the sleeper and ballast particles,which is beneficial to filling the gaps under the sleeper.The coordination number of ballast gradually increases during the retracting stage,and the distribution of normal contact force tends to be uniform,which is conducive to the stability of ballast bed.The manual tamping operation effectively reduces the difference in contact status between the ballast in the surrounding area of the sleeper.关键词
有砟道床/人工捣固装置/离散元/耦合算法/接触状态Key words
ballast bed/manual tamping device/discrete element/coupling algorithm/contact state分类
交通工程引用本文复制引用
钱忠霞,肖宏,张智海,迟义浩,方家..有砟道床人工捣固作业模型建立及力学性能分析[J].中南大学学报（自然科学版）,2024,55(3):1241-1251,11.基金项目
国家自然科学基金资助项目(51978045) （51978045）
中央高校基本科研业务费专项资金资助项目(2022JBXT010)(Project(51978045)supported by the National Natural Science Foundation of China （2022JBXT010）
Project(2022JBXT010)supported by the Fundamental Research Funds for the Central Universities) （2022JBXT010）
