石油井架可靠性设计中的荷载与荷载效应

对典型油田的３２钻机的最大工作荷载的可靠性进行了统计，求得其概率分布类型为正态分布，同时求得了其统计特征（均值、标准差及变异系数）。在此基础上，求得了３２钻机在设计基准期内的荷载的最大值ＱＴ的分布函数ＦＴ（ｘ）及其它有用的统计参数，进而确定出了３２钻机用Ｋ型井架的荷载效应．将模型井架的应力实测结果分别与用线性及非线性结构有限元程序所得的计算结果进行对比，探讨了计算方法的变异性．这两种计算方法所得结果相差很小，均可用于井架的强度计算．所得研究结果可直接用于井架的疲劳可靠性设计与分析，并可经适当变换推广到最大静强度的可靠性设计中．

LOAD AND LOADING REACTION IN RELIABILITY DESIGN OF OIL DERRICK

By means of the reliability statistics of the maximum working load of type 32 drilling rigs, the probability distribution is determined as normal distribution, and the statistical characteristics (as mean value, standard variance and variation coefficient) are calculated. The probability distribution function of the maximum value of loading in the design reference time of type 32 drilling rig is obtained. Further, the loading reactions of K derrick used in type of 32 drilling rig are determined. The variability of the calculating methods is discussed by comparing the measured stresses to a model derrick with the calculated results respectively from linear and nonlinear structure finite programs.