研究钢板厚度截面上屈服强度非均匀性对环肋圆柱壳结构静压强度、极限承载能力的影响，提出相应的分析评估方法。基于板壳的单向拉压和纯弯曲模型，建立钢板厚度方向上屈服强度非均匀分布的等效屈服强度计算公式，并通过试验与仿真验证等效屈服强度计算公式的准确性；采用5种不同的计算方法，分析板材屈服强度非均匀性对典型尺寸环肋圆柱壳结构极限承载能力的影响。结果表明，基于拉压等效屈服强度的结构强度、极限承载能力计算方法能够用于评估板材屈服强度非均匀性对环肋圆柱壳结构静压力学性能的影响分析。板材心部屈服强度降低11%，会导致环肋圆柱壳结构总体失稳极限承载能力降低1.6%，局部失稳极限承载能力降低1.8%。
In this paper, the influence of non-uniformity of yield strength on the static strength and ultimate bearing capacity of ring-stiffened cylindrical shell structure is studied, and the corresponding analysis and evaluation method is proposed. Based on the unidirectional tensile and pure bending model of shell, the equivalent yield strength calculation formula with the non-uniform yield strength distribution in the thickness direction is established, and the rationality of the formula is verified by experiments and simulations. Five different calculation methods are used to analyze the influence of non-uniformity of sheet yield strength on the ultimate load bearing capacity of typical ring-stiffened cylindrical shell structures. The results show that the calculation method of structural strength and ultimate bearing capacity based on tensile and compressive equivalent yield strength can be used to evaluate the influence of non-uniformity of sheet yield strength on static mechanical properties of ring-stiffened cylindrical shell structures. The general instability ultimate bearing capacity of ring-stiffened cylindrical shell structure will be reduced 1.6%, the local instability ultimate bearing capacity will be reduced 1.8%.
2024,46(23): 7-14 收稿日期：2024-1-2
DOI：10.3404/j.issn.1672-7649.2024.23.002
分类号：U663.1
作者简介：纪涵(2000-),男,硕士,研究方向为潜艇结构设计
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