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考虑轮轨多点接触关系的车轨系统地震响应分析

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  • 国家科技期刊平台
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为研究地震作用下轮轨多点接触关系及其对车轨系统地震响应的影响，本文基于虚拟渗透理论分析了轮轨多点接触的几何关系，采用修正的Kik-Piotrowski方法和Kalker线性理论求解轮轨接触力，并建立了地震作用下考虑轮轨多点接触关系的列车-无砟轨道系统模型;以某高速铁路为对象，研究了车轨系统的地震响应及列车的行车安全性。研究结果表明:地震作用下轮轨之间会出现 2 点接触情况，次接触斑对轮轨接触行为具有重要影响;轮轨多点接触关系对地震作用下的轮轴横向力和脱轨系数具有重要影响，不考虑该多点接触关系会低估列车的行车安全性;车轮抬升量对地震动强度不是特别敏感。
Seismic response analysis of vehicle-track system considering wheel-rail multipoint contact relationship
The geometric relationship of wheel-rail multipoint contact was analyzed based on virtual penetration the-ory,while the wheel-rail contact forces were solved by using the modified Kik-Piotrowski method and Kalker's line-ar theory.These were done with the goal of studying the wheel-rail multipoint contact relationship during earth-quakes and its influence on the seismic response of the vehicle-track system.Then,a train-ballastless track system model was established,considering the wheel-rail multipoint contact relationship during an earthquake.The seismic response of this track system and the running safety of trains were studied by taking a high-speed railway as the re-search object.The results reveal that the two-point contact occurs between the wheel and rail during an earthquake and that the secondary contact patch has an important influence on the wheel-rail contact behavior.In addition,the wheel-rail multipoint contact relationship has an important influence on the wheelset lateral force and the derailment coefficient under earthquake.Thus,ignoring it will underestimate the running safety of trains.Wheel rise is not particularly sensitive to seismic intensity.

wheel-rail multi-point contactvehicle-track systemseismic responsevirtual penetration theoryKik-Piotrowski methodcontact patchballastless trackrunning safety

朱小杰、王浩、周智辉、茅建校、郜辉

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东南大学 混凝土与预应力混凝土结构教育部重点实验室,江苏 南京 210096

中南大学 土木工程学院,湖南 长沙 410075

轮轨多点接触 车轨系统 地震响应 虚拟渗透理论 Kik-Piotrowski方法 接触斑 无砟轨道 行车安全

国家自然科学基金项目国家自然科学基金项目

5172280451978155

2024

10.11990/jheu.202209006

哈尔滨工程大学学报
哈尔滨工程大学

哈尔滨工程大学学报

CSTPCD北大核心
影响因子：0.655
ISSN：1006-7043
年,卷(期)：2024.45(3)
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