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本文以铁道部四方车辆研究所实测转8A 铸钢侧架的随机载荷谱为依据,对用局部应力一应变法估算铸钢侧架裂纹形成寿命时所用6个材料疲劳参数的取值、计算局部应力一应变响应的方法、损伤计算方法、及平均应力对侧架寿命估算的影响等问题进行了探讨。
In this paper, based on the measured load spectrum of the side frame of Z8A cast steel measured by Sifang Vehicle Research Institute of the Ministry of Railways, the fatigue parameters of six materials used in estimating the life span of the side frame cracks of the cast steel by the local stress-strain method are calculated and the local Stress-strain response method, damage calculation method, and the influence of average stress on the estimation of side frame life are discussed.