航空学报 > 2025, Vol. 46 Issue (7): 230738-230738   doi: 10.7527/S1000-6893.2024.30738

固体力学与飞行器总体设计

可靠性分析改进元模型重要抽样算法

员婉莹1,2,3,4,5(), 李逢源1, 黄博1, 王思予1, 焦韵菲1, 白馨雨1, 黄雪琪1   

  1. 1.西北工业大学 航空学院,西安 710072
    2.西北工业大学 重庆科创中心,重庆 401135
    3.西北工业大学 深圳研究院,深圳 518057
    4.中国飞行试验研究院 飞机飞行试验技术研究所,西安 710089
    5.飞行器基础布局全国重点实验室,西安 710072
  • 收稿日期:2024-05-27 修回日期:2024-07-31 接受日期:2024-11-13 出版日期:2024-11-26 发布日期:2024-11-25
  • 通讯作者: 员婉莹 E-mail:wanying_yun@nwpu.edu.cn
  • 基金资助:
    重庆市自然科学基金(CSTB2022NSCQ-MSX0861);航空科学基金(20220009053001);陕西省科学技术协会青年人才托举计划(20230446);广东省基础与应用基础研究基金(2022A1515011515);国家自然科学基金(12002237)

Enhanced metamodel-based importance sampling method for reliability analysis

Wanying YUN1,2,3,4,5(), Fengyuan LI1, Bo HUANG1, Siyu WANG1, Yunfei JIAO1, Xinyu BAI1, Xueqi HUANG1   

  1. 1.School of Aeronautics,Northwestern Polytechnical University,Xi’an  710072,China
    2.Innovation Center NPU Chongqing,Northwestern Polytechnical University,Chongqing  401135,China
    3.Research & Development Institute in Shenzhen,Northwestern Polytechnical University,Shenzhen  518057,China
    4.Aircraft Flight Test Technology Institute,Chinese Flight Test Establishment,Xi’an  710089,China
    5.National Key Laboratory of Aircraft Configuration Design,Xi’an  710072,China
  • Received:2024-05-27 Revised:2024-07-31 Accepted:2024-11-13 Online:2024-11-26 Published:2024-11-25
  • Contact: Wanying YUN E-mail:wanying_yun@nwpu.edu.cn
  • Supported by:
    Natural Science Foundation of Chongqing(CSTB2022NSCQ-MSX0861);Aeronautical Science Foundation of China(20220009053001);Young Talent Fund of Association for Science and Technology in Shaanxi of China(20230446);Guangdong Basic and Applied Basic Research Foundation(2022A1515011515);National Natural Science Foundation of China(12002237)

摘要:

为了高效地开展结构可靠性分析,通过引入代理模型更新的误差停止准则,提出了改进的元模型重要抽样算法。首先,建立了元模型重要抽样算法中失效概率预测值与真实值之间相对误差的解析关系;其次,推导了失效概率预测值与真实值之间相对误差上限与Kriging代理模型预测精度之间的近似关系,通过失效概率预测值与真实值之间相对误差不大于预设精度,建立了基于失效概率预测误差指导的Kriging代理模型更新准则,提高了Kriging代理模型在元模型重要抽样算法中的更新效率;最后,将所提的改进元模型重要抽样算法应用至数值算例及涡轮轴疲劳寿命可靠性分析的工程算例中,计算结果验证了所提算法的高效性和准确性。

关键词: 可靠性分析, 元模型, 重要抽样算法, Kriging代理模型, 误差停止准则

Abstract:

To give an efficient analysis of structural reliability, an enhanced metamodel-based importance sampling method is proposed in this paper by introducing an error-based stopping criterion for updating the Kriging model. Firstly, an analytical relationship of the relative error between the estimate of failure probability by the metamodel-based importance sampling method and the true value obtained by the actual limit state function is established. Secondly, an approximate relationship between the upper bound of the relative error between the estimate of failure probability and the true value and the prediction accuracy of the Kriging model is derived. By ensuring that the relative error between the estimate of failure probability by the metamodel-based importance sampling method and the true value obtained by the actual limit state function does not exceed a predefined accuracy, an error-based stopping criterion for updating the Kriging model is established to improve the efficiency of the existing metamodel-based importance sampling method. Finally, the proposed method is applied to numerical examples and engineering examples of reliability analysis of turbine shaft fatigue life. The results verify the efficiency and accuracy of the proposed method.

Key words: reliability analysis, metamodel-based, importance sampling method, Kriging model, error-based stopping criterion

中图分类号: