CAJ | 학술논문

在分析轮径差类型的基础上，探讨轮径差对轮对受力状态和运动形态的影响。建立八轴重载机车+详细 C80型运煤专用敞车+简化 C80型运煤专用敞车的列车模型，仿真分析机车在惰行和电制动工况下，不同类型轮径差对轮轨相互作用的影响。结果表明，轮径差会改变轮对的运动形态，从而引起轮轨相互作用的变化，加剧轮轨之间的磨耗；由于摇头角会引起轮对的横向蠕滑，因此反相轮径差对轮轨横向力和轮轨磨耗的影响要大于同相轮径差；电制动工况相对惰行工况而言，横向蠕滑力有所减小，因此电制动工况下轮径差对轮轨横向力的影响要小于惰行工况，并且轮轴横向力相对惰行工况总体也有所减小；由于制动力会降低轮对对左右轮滚动圆半径的调整能力，因此电制动工况下的稳态轮径差要大于惰行工况下的稳态轮径差，轮轨磨耗也要远大于惰行工况，在电制动工况下，轮径差还会引发轮对偏磨的出现，进一步加大轮径差。
재분석륜경차류형적기출상，탐토륜경차대륜대수력상태화운동형태적영향。건립팔축중재궤차+상세 C80형운매전용창차+간화 C80형운매전용창차적열차모형，방진분석궤차재타행화전제동공황하，불동류형륜경차대륜궤상호작용적영향。결과표명，륜경차회개변륜대적운동형태，종이인기륜궤상호작용적변화，가극륜궤지간적마모；유우요두각회인기륜대적횡향연활，인차반상륜경차대륜궤횡향력화륜궤마모적영향요대우동상륜경차；전제동공황상대타행공황이언，횡향연활력유소감소，인차전제동공황하륜경차대륜궤횡향력적영향요소우타행공황，병차륜축횡향력상대타행공황총체야유소감소；유우제동력회강저륜대대좌우륜곤동원반경적조정능력，인차전제동공황하적은태륜경차요대우타행공황하적은태륜경차，륜궤마모야요원대우타행공황，재전제동공황하，륜경차환회인발륜대편마적출현，진일보가대륜경차。
Influence of wheel diameter difference on the stress and movement of wheelset is discussed based on the analysis on wheel diameter difference types. A train dynamic model which consists of an eight axle heavy haul locomotive+a detailed C80 gondola car +a simplified C80 gondola car has built up, the effect of different type of wheel diameter difference on the wheel/rail interaction under coasting and breaking condition is simulated. The results show that the movement of wheelset will changed for the reason of wheel diameter difference, thus affect the wheel/rail interaction and aggravate the wear between wheel and rail; Because the yaw angle of wheelset caused lateral creep, so the influence of wheel diameter difference in anti-phase on the wheel/rail lateral force and wear is larger than wheel diameter difference in same-phase. Breaking condition decrease lateral creepage force compare with coasting condition, so the influence of wheel diameter difference on wheel rail lateral force under electric braking condition should be less than coasting condition, and decrease lateral wheelset force as well. Due to the braking force can reduce the adjustment ability of wheelset on its rolling diameter between left and right wheel, the steady wheel diameter difference under electric braking condition should be larger than the steady wheel diameter difference under coasting condition, the wear between wheel and rail would overweigh the coasting condition too, wheel diameter difference also leads to eccentrically-wearing under breaking condition, further increase wheel diameter difference.