为研究耐压球壳的可靠性计算问题，提出基于自适应Kriging的耐压球壳可靠性计算方法。该方法主要包括在开展试验设计的基础上，基于有限元方法获得样本点对应的承载能力，使用自适应Kriging方法结合ERF学习函数构建结构失效方程，并在此基础上开展可靠性计算。耐压球壳计算结果表明，10个验证样本点计算结果偏差均小于0.5‰，该方法具有较高精度和计算效率。基于计算结果提出在开展自适应方法建立Kriging模型过程中，学习函数的收敛指标应随着计算方法的精度进行适当地调整的结论。研究结果可为无失效方程结构的可靠性计算提供参考。
In order to study the reliability calculation of pressure shell, a reliability calculation method of pressure shell based on adaptive Kriging is proposed in this paper. This method mainly includes: obtaining the corresponding bearing capacity of the sample points based on the finite element method on the basis of experiment design, using adaptive Kriging and ERF learning function to construct the structural failure equation, and carrying out reliability calculation on the basis of failure equation.The calculation results of a spheriacal pressure shell show that the deviation of calculation results of 10 verification sample pointes is less than 0.5‰, it is also pinted that the method has high accuracy and calculation efficiency. Based on the calculation results, it is proposed that the convergence index of learning function should be appropriately adjusted with the accuracy of the calculation method in the process of developing adaptive methods to establish Kriging model. This research can provide reference for structural reliability calculation without failure equation.
2024,46(6): 20-25 收稿日期：2023-03-07
DOI：10.3404/j.issn.1672-7649.2024.06.004
分类号：U663.2
基金项目：国家重点研发计划资助项目（2021YFC2802003）
作者简介：冯士超(1992-),男,硕士,工程师,研究方向为结构可靠性评估与设计
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