本文针对某罩壳结构局部模型的试验过程中出现的反向凹曲问题，以有限元仿真方法研究曲壳的弯曲特性及影响因素，重点探讨曲壳曲率、厚度以及曲壳的弯曲刚度等因素对曲壳屈曲、后屈曲过程中的位移、应力以及曲壳屈曲后回复特性的影响。研究表明：曲率半径及壳板厚度与曲壳的弯曲刚度正相关，提高曲率半径可有效增加曲壳的承载能力；曲壳弯曲刚度对曲壳抗弯特性的影响为线性，屈曲载荷随弯曲刚度增加而线性增大。
In this paper, the inverse concave curve of a local model of a shell structure is analyzed. The bending characteristics and influence factors of the curved shell are studied by the finite element simulation method. The influence of curvature, thickness and bending stiffness of curved shell on the buckling of curved shell and the displacement and stress in the post buckling process are mainly discussed. The effect of the post buckling response characteristics of a curved shell. The study shows that, the curvature radius and the thickness of the shell plate are positively related to the bending stiffness of the curved shell, and the increase of the radius of curvature can effectively increase the bearing capacity of the curved shell, the flexural stiffness of the curved shell has a linear effect on the bending property of the curved shell, and the buckling load increases linearly with the increase of the flexural rigidity.
2020,42(7): 40-44 收稿日期：2018-11-20
DOI：10.3404/j.issn.1672-7649.2020.07.008
分类号：U668.3+4
作者简介：董云龙(1995-),硕士研究生,研究方向为船体结构与振动
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