铁道标准设计2024，Vol.68Issue(1)：72-79,8.DOI:10.13238/j.issn.1004-2954.202207050005
温度-轨道不平顺组合激励下车-轨-桥耦合动力响应分析
Analysis of Coupled Dynamic Response of Temperature-track Irregularity Combined Excitation Train-Track-Bridge
摘要
Abstract
In order to study the driving safety of ballastless track on a short tower cable-stayed bridge of kilometer class under combined temperature-track upset excitation,firstly,the temperature loading condition is determined according to the operating environment,and ANSYS is used for static analysis to determine the most unfavorable temperature loading condition.The dynamic response of high-speed trains,the effect of different travel speeds on the dynamic response of vehicles and bridges is calculated,and the travel safety of ballastless track on kilometer-class short tower cable-stayed bridges is evaluated according to the existing code standards,and a comfortable travel speed range for safe travel on bridges under combined temperature-track upset excitation is proposed.The analysis results show that:when crossing the bridge at 350 km/h design travel speed,the maximum values of dynamic car and trailer vertical acceleration are 0.8 m/s2 and 0.66 m/s2,respectively,and all the dynamic response data are at excellent level and meet the requirements of relevant specifications;the acceleration maximum value of the car body is positively correlated with the travel speed;at the travel speed of 400 km/h,the maximum value of dynamic car body vertical acceleration is 0.95 m/s2,which is 1.48 times of the travel speed of 250 km/h;when the speed reaches 400 km/h,the Sperling comfort index is changed from"excellent"to"good",and the travel comfort is relatively poor.In order to ensure the safety of traffic on the bridge,it is recommended that the travel speed should not exceed 400 km/h.The conclusion of this study can provide reference for laying ballastless track on kilometer-class short tower cable-stayed bridge.关键词
高速铁路/斜拉桥/无砟轨道/组合不平顺/动力响应Key words
high speed railway/cable-stayed bridge/ballastless track/combination irregularity/dynamic response分类
交通工程引用本文复制引用
李鹏鑫,邢书科,王兆刚,郭玉鹏,杨宇栓,杨荣山..温度-轨道不平顺组合激励下车-轨-桥耦合动力响应分析[J].铁道标准设计,2024,68(1):72-79,8.基金项目
山东省路桥集团有限公司科研项目(R110122H01161) （R110122H01161）
中铁上海工程局集团有限公司科研项目(R110122H01023) （R110122H01023）
山东铁路投资控股集团有限公司科研项目((2021)ZJTL-QT-001) （(2021）
