西南交通大学学报
西南交通大學學報
서남교통대학학보
JOURNAL OF SOUTHWEST JIAOTONG UNIVERSITY
2014年
4期
700-705
,共6页
王忆佳%曾京%高浩%罗仁
王憶佳%曾京%高浩%囉仁
왕억가%증경%고호%라인
车轮扁疤%轮轨冲击%扁疤限值
車輪扁疤%輪軌遲擊%扁疤限值
차륜편파%륜궤충격%편파한치
wheel flat%wheel/rail impact%wheel flat limit
为了研究高速列车车轮扁疤引起的动力学问题,根据多体动力学理论和等效轨道激扰法,建立了我国某型高速车辆的动力学模型及车轮新、旧两种扁疤模型。应用车轮轮径变化扁疤模拟法对车轮扁疤进行模拟,并对高速车辆轮轨冲击动力效应进行仿真分析。结果表明:新、旧扁疤轮轨冲击力规律不同,旧扁疤产生轮轨垂向冲击力随车速的增大而增大,在高速运行条件下,远大于新扁疤产生的垂向冲击力;当车速分别高于200和250 km/h时,车轮扁疤长度需要限制在35和30 mm以内。
為瞭研究高速列車車輪扁疤引起的動力學問題,根據多體動力學理論和等效軌道激擾法,建立瞭我國某型高速車輛的動力學模型及車輪新、舊兩種扁疤模型。應用車輪輪徑變化扁疤模擬法對車輪扁疤進行模擬,併對高速車輛輪軌遲擊動力效應進行倣真分析。結果錶明:新、舊扁疤輪軌遲擊力規律不同,舊扁疤產生輪軌垂嚮遲擊力隨車速的增大而增大,在高速運行條件下,遠大于新扁疤產生的垂嚮遲擊力;噹車速分彆高于200和250 km/h時,車輪扁疤長度需要限製在35和30 mm以內。
위료연구고속열차차륜편파인기적동역학문제,근거다체동역학이론화등효궤도격우법,건립료아국모형고속차량적동역학모형급차륜신、구량충편파모형。응용차륜륜경변화편파모의법대차륜편파진행모의,병대고속차량륜궤충격동력효응진행방진분석。결과표명:신、구편파륜궤충격력규률불동,구편파산생륜궤수향충격력수차속적증대이증대,재고속운행조건하,원대우신편파산생적수향충격력;당차속분별고우200화250 km/h시,차륜편파장도수요한제재35화30 mm이내。
In order to study the dynamic issues induced by wheel flats for high speed trains,a dynamic model and new/worn wheel flat models were developed using the multi-body theory and the equivalent track excitation method. The simulation method considering the change of wheel radius was applied to simulate the wheel flat and analyze the wheel/rail impact caused by wheel flats. The results show that the behaviors of wheel-rail impact forces caused by new and worn wheel flats are different:the impact force caused by a worn flat increases with the train speed increasing,and is significantly larger than that by a new flat at high speeds. When the running speed of the train is larger than 200 and 250 km/h,the length of the wheel flat should be limited within 35 and 30 mm,respectively.