加筋板结构后极限强度行为影响参数研究

摘要

为使船体结构的安全性设计得到有效技术支撑，通过ABAQUS有限元软件，对面内压力作用下的加筋板结构进行响应分析，得出加筋板结构在达到极限强度之后的载荷－位移关系曲线，即后极限强度行为。探讨了板厚、材料硬化率、边界条件以及初始缺陷等影响船体加筋板结构受损之后承载能力的重要参数。结果表明：加强筋数量的增加对于提高加筋板结构在给定变形下的承载能力有利，板厚的增加并不能有效改善结构受损后的承载能力。%In order to provide the technical support for the safety of ship structure design, this paper focuses on the response of stiffened plate structure under in⁃plane compression by utilizing the nonlinear structural analysis code ABAQUS, once ultimate strength of the stiffened plate is reached, the load⁃displacement relationships, i.e. the post⁃ultimate strength behaviour can be obtained. Parametric dependencies of the post⁃ultimate strength behaviour of stiffened plates, such as geometric dimensions of plate, material parameters, initial imperfection and boundary conditions which influence the load carrying capacity are explored. Conclusions can be drawn:The increase of number of stiffeners is advantageous for enhancing the load carrying capacity of the structure when the deflection is assumed, and increasing of thickness of plate cannot effectively improve the load carrying capacity of the damaged structure.