CAJ | 학술논문

工程上薄壁网格加筋壳常发生蒙皮局部失稳和塑性失稳等非线性稳定性问题，要获得结构临界失稳载荷和失效模式需要考虑几何非线性、材料非线性及结构失稳瞬时的振动效应，进行非线性动力学分析。以轴压作用下正交网格加筋圆筒壳为研究对象，基于Abaqus软件，提出了隐式/显式两种非线性动力学有限元方法求解网格加筋壳稳定性问题的建模及求解收敛控制要求。结果表明，通过有效控制，隐式/显式动力学方法能准确求解薄壁网格加筋壳临界失稳载荷，模拟结构失效模式，且适用线性/非线性各种失稳情况。
공정상박벽망격가근각상발생몽피국부실은화소성실은등비선성은정성문제，요획득결구림계실은재하화실효모식수요고필궤하비선성、재료비선성급결구실은순시적진동효응，진행비선성동역학분석。이축압작용하정교망격가근원통각위연구대상，기우Abaqus연건，제출료은식/현식량충비선성동역학유한원방법구해망격가근각은정성문제적건모급구해수렴공제요구。결과표명，통과유효공제，은식/현식동역학방법능준학구해박벽망격가근각림계실은재하，모의결구실효모식，차괄용선성/비선성각충실은정황。
Non-linear buckling such as local skin buckling and plastic buckling often appears on thin-walled grid-stiffened shells. Non-linear dynamic analysis considered geometric nonlinear, material nonlinear and buckling temporal effect can be used to obtain the critical loads and failure modes.. Taking grid-stiffened shells under axial loads effects as the object, implicit and explicit non-linear dynamic FE methods are proposed to solve grid-stiffened shells buckling modeling and control requirement using ABAQUS dynamic mode. The result demonstrates that effective control and implicit/explicit dynamic methods can be used to obtain thin-walled grid-stiffened shells critical buckling loads and simulate structure failure mode. The method applies to other linear/non-linear buckling.