CAJ | 학술논문

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。
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.