大直径薄壁结构强度变差系数研究现状与展望

Research Status and Prospects on the Strength Variation Coefficient of

本文以受压屈曲失效薄壁加筋结构为对象,综述了仿真预估强度变差系数相关技术。梳理了影响结构强度不确定性设计参量及其测量、统计表征方法;针对薄壁结构屈曲强度受初始几何形貌影响显著问题,调研了考虑初始几何等缺陷的高精度有限元仿真方法;为实现薄壁结构承载能力高效打靶计算,研究了常用代理模型构建相关技术及其适用情况。并针对目前薄壁加筋结构强度变差仿真预估解决方案的局限性,提出了相应解决途径及技术展望。

This article focuses on the analysis of thin-walled structures with respect to buckling failure,providing an overview of simulation and estimation techniques for strength variation coefficients.It reviews the parameters influencing structural strength uncertainty,their measurement,and statistical characterization methods.To address the significant impact of primary geometric defects on the buckling strength of thin-walled structures,it investigates high-precision finite element simulation methods that consider primary geometric imperfections.In order to efficiently calculate the load-bearing capacity of thin-walled structures,it also studies the construction of commonly used surrogate models and their applicability.Recognizing the limitations of the current solutions for simulating and estimating strength variation in thin-walled structures,it proposes relevant technical approaches to address these challenges.