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地铁车轮在运用中受到与车轮转动相关的高频次轮轨载荷和频繁的闸瓦制动热负荷的联合作用,是导致车轮疲劳失效的主要原因。该文采用有限元法模拟了全程实际运营下车轮的制动热应力和轮轨机械应力,并分析了热应力与轮轨机械应力的叠加模式,进而提出了地铁车轮疲劳强度评价的思路和方法。通过实例分析:揭示出了制动和车轮踏面磨耗量对车轮疲劳强度的影响规律。
The combined effect of high-frequency secondary wheel rail load and frequent brake heat load on the subway wheel during operation is the main cause of wheel fatigue failure. This paper simulates the braking thermal stress and the wheel-rail mechanical stress of the wheel under the actual operation by finite element method and analyzes the superposition mode of the thermal stress and the mechanical stress of the wheel-rail, and then puts forward the train of thought and method of evaluating the fatigue strength of the subway wheel . Through the example analysis: reveals the brake and wheel tread wear on the fatigue strength of the law.