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提出了计算大跨度空间网格结构动力可靠度的一种新算法。以随机振动的首次超越为破坏准则,依据随机变量功能函数模式建立随机结构动力可靠度的功能函数;引入响应面法,对功能函数进行拟合;对Nataf进行线性化变换,并将该变换与iHLRF算法结合,实现了基于线性化Nataf变换和iHLRF算法的可靠度计算方法。将该法应用于大跨度空间网格结构的动力可靠度计算中,结果表明此算法具有良好的计算精度和效率,且计算过程简单实用。
A new algorithm for calculating the dynamic reliability of long-span space grid structure is proposed. Based on the first time-exceeded criterion of random vibration, the functional function of dynamic structural reliability of random structure was established based on random variable function model. Response surface method was introduced to fit function function. Nataf was transformed linearly, iHLRF algorithm, the reliability calculation method based on linear Nataf transform and iHLRF algorithm is realized. The method is applied to the dynamic reliability calculation of large-span space grid structure. The results show that this algorithm has good calculation accuracy and efficiency, and the calculation process is simple and practical.