抓斗装卸桥主梁疲劳寿命的估算

Estimation of the fatigue life for main girders on transporter grabbing cranes

利用常幅疲劳S N曲线和Miner线性累积损伤理论 ,在对实测抓斗装卸桥时间应力历程所进行的雨流计数结果和八级载荷谱分析的基础上 ,得出其符合威希尔分布的结论 ,并提出了计算主梁结构疲劳寿命的简易方法。

Wihle taking consideration that the maximum stress probability distribution conforms to Weibuer distribution,this paper uses S-N (stress to cycle number) curve and Miner accumulating damage theory to estimate the fatigue life for main girders on transporter grabbing cranes.