CAJ | 학술논문

重载货车在实际的生产及服役条件下，轮轨之间的相互作用不仅受各种轨道不平顺激励的影响，也会受到车轮状态变化的激励作用。从车轮运行状态的角度研究重载货车轮轨间相互作用，分别以车轮磨耗前后踏面形状、车轮多边形化、车轮质量偏心和轮对结构变形四种车轮运行状态来模拟分析车轮各状态参数与轮轨垂向作用力的关系，并总结其影响规律。研究表明：车轮踏面形状主要影响轮轨接触斑面积以及接触应力分布，磨耗后车轮比新轮的接触应力分布范围更广泛；在不同速度下，车轮多边形化的波深、相位差及谐波阶数对轮轨垂向力产生不同程度的影响；车轮质量偏心对轮轨产生周期性垂向冲击，但振动幅度并不大；轮对挠度的动态变化对轮轨动态接触载荷影响比较显著，尤其是轮对结构弯曲振动加剧了轮轨垂向动作用力。
중재화차재실제적생산급복역조건하，륜궤지간적상호작용불부수각충궤도불평순격려적영향，야회수도차륜상태변화적격려작용。종차륜운행상태적각도연구중재화차륜궤간상호작용，분별이차륜마모전후답면형상、차륜다변형화、차륜질량편심화륜대결구변형사충차륜운행상태래모의분석차륜각상태삼수여륜궤수향작용력적관계，병총결기영향규률。연구표명：차륜답면형상주요영향륜궤접촉반면적이급접촉응력분포，마모후차륜비신륜적접촉응력분포범위경엄범；재불동속도하，차륜다변형화적파심、상위차급해파계수대륜궤수향력산생불동정도적영향；차륜질량편심대륜궤산생주기성수향충격，단진동폭도병불대；륜대뇨도적동태변화대륜궤동태접촉재하영향비교현저，우기시륜대결구만곡진동가극료륜궤수향동작용력。
In actual production and service conditions of a heavy wagon,the wheel/rail interaction is influenced not only by incentive effects from all kinds of track irregularity,but also by incentive effects from variation of wheel state. Here,from the perspective of wheel running state,change and trend of wheel/rail interaction was studied based on parameters of wheel states including wheel tread shape,wheel polygonization,wheel eccentric mass and wheelset structural deformation.The result indicated that wheel tread shape affects area of contact spot and distribution of contact stress;under different speeds,depth,phase and order of wheel polygonization have different influences on vertical wheel/rail force;wheel eccentric mass leads to periodic vertical impacts between wheel and rail,but the amplitude of vibration is not large;the effect of dynamic varying of wheelset's deflection on the wheel/rail dynamic contact load is remarkable, especially,structural bending vibration of wheelset intensifies the vertical wheel/rail interaction force.