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网壳稳定性计算中各随机变量的概率分布函数很难确定,这给网壳稳定性的可靠度计算带来困难。本文建立了网壳可靠度计算模型,利用结构可靠度计算的高阶矩法,进行随机变量正态变换,避免了对随机变量分布形式的假设,算例表明,高阶矩法可较方便、准确地进行网壳稳定性可靠度计算。
The probability distribution function of each random variable in the stability calculation of latticed shells is hard to be determined, which makes it difficult to calculate the reliability of Lattice shell stability. In this paper, the calculation model of the reticulation reliability is established. By using the high-order moment method of structural reliability calculation, the normal transformation of random variables is avoided, which avoids the assumptions on the distribution of random variables. The examples show that the higher moments method is more convenient, Accurately calculate the reliability of the stability of the shell.