CAJ | 학술논문

根据结构动力学原理和有限元理论，建立了轮轨系统三维非线性有限元模型，用接触单元模拟轮轨实际的接触行为，计算了在不同行车速度下系统的振动特性沿轨道长度方向的变化规律.计算结果表明：系统的振动在距离轮轨接触中心点2.1 m的范围内很快衰减，在2.1 m之外其值变化很小；并且当速度达到350 km·h-1时，系统的振动将会加剧，同时根据系统的振动情况和边界条件对计算结果的影响，建议钢轨计算长度取4.8~6 m.
근거결구동역학원리화유한원이론，건립료륜궤계통삼유비선성유한원모형，용접촉단원모의륜궤실제적접촉행위，계산료재불동행차속도하계통적진동특성연궤도장도방향적변화규률.계산결과표명：계통적진동재거리륜궤접촉중심점2.1 m적범위내흔쾌쇠감，재2.1 m지외기치변화흔소；병차당속도체도350 km·h-1시，계통적진동장회가극，동시근거계통적진동정황화변계조건대계산결과적영향，건의강궤계산장도취4.8~6 m.
Based on structural dynamics principle and finite element theory,a three dimensional nonlinear finite element model of wheel/rail system considering the contact behavior between wheel and rail is established.The rule that vibration characteristics change with the rail length at different train speeds is calculated.The results show that the system vibration along the rail re-duces quickly within the scope of the wheel/rail contact center 2.1 m and changes a litter in the outside scope of 2.1 m.At the same time,the vibration will be intensified when the train speed reaches the 350 km/h.According to the influence of system vibration and boundary conditions on the simulation result,the rail length calculated can be 4.8 m~6 m.