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本文采用铁道部四方车辆研究所实测的转8A型摇枕随机载荷谱,用局部应力-应变法估算了摇枕疲劳裂纹形成寿命;采用低-高-低的程序载荷谱,用断裂力学方法估算了摇枕裂纹扩展寿命;最后得出了转8A型摇枕疲劳破坏的总寿命估算值。
In this paper, the random load spectrum of Zhuan 8A bolster was measured by Sifang Vehicle Research Institute of Ministry of Railways. The fatigue life of the bolster was estimated by local stress-strain method. The program load spectrum with low-high-low was used to estimate the fatigue crack. The bolster crack growth life; Finally, the total life expectancy of the Z8A bolster fatigue failure was obtained.