加筋板单元的载荷-端缩曲线是影响Smith法计算精度的重要因素，而目前HCSR规定的载荷-端缩曲线尚未考虑侧向载荷的作用。为了计入侧向载荷对加筋板单元载荷-端缩曲线的影响，拓宽Smith法的适用范围，采用非线性有限元法，计算192个具有梁柱屈曲破坏模式的T型加筋板单元，在纵向压缩载荷和侧向载荷作用下的极限强度。通过回归分析，得出在侧向载荷和纵向压缩载荷联合作用下，T型加筋板单元在梁柱屈曲模式下的载荷-端缩曲线修正公式。对8个T型加筋板模型分别采用修正公式和非线性有限元法计算结构的临界应力和临界应变，2种计算方法结果相对误差小于10%，验证了修正公式的有效性。
The load–end shortening curve of stiffened plate element is an important factor affecting the accuracy of Smith method, however, the effect of lateral load has not been considered in the load-end shortening curve specified by HCSR. To consider the effect of lateral load on the load-end shortening curve of stiffened plate element and broaden the scope of application of Smith method, the ultimate strength of 192 T-stiffened plate elements with beam column buckling failure mode under longitudinal compression load and lateral load is calculated by nonlinear finite element method. Through regression analysis, the load-end shortening curve correction formula of T-stiffened plate element is obtained. The critical stress and strain of 8 T-stiffened plates are calculated by the correction formula and the nonlinear finite element method, respectively. The relative error of results is less than 10%, which verifies the validity of the correction formula.
2021,43(7): 19-26 收稿日期：2020-05-15
DOI：10.3404/j.issn.1672-7649.2021.07.005
分类号：U661.43
基金项目：国家自然科学基金资助项目(51979163，51809167，51809168)；国家教育部、财政部重大科研专项(201335)
作者简介：陈雨哲(1996-),男,硕士研究生,主要研究方向为船体结构极限强度
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