集装箱船弯扭极限强度的相似模型分析

根据薄壁结构理论,推导船体弯曲相似和扭转相似的模型设计条件,提出骨材和板材分别等效的方法来解决弯扭相似的冲突问题.以某集装箱船为研究对象,建立弯扭相似优化设计的数学模型,基于多岛遗传算法将非可行域的设计改进为可行性设计,利用非线性有限元法,计算模型与实船的纯弯曲、纯扭转和弯扭组合荷载作用下的船体极限强度,从而验证了模型与实船的相似性,并利用相似模型推算出实船的弯扭极限强度.

Analysis of the Similar Model for Ultimate Strength Subjected to Combined Action of Bending and Torsion of a Container Ship

The design conditions about a ship similar model under the action of bending and torsion were derived based on the thin walled beam theory, and then one method about independently dealing with stiffeners and plates was presented. One container ship was studied as an example, a mathematic model optimizing the similar model was set up, and then based on multi island genetic algorithm the unfeasible design was improved into the feasible region. Using the nonlinear FEM method validates the consistency of the real ship’s and similar model’s ultimate strength under the action of bending and torsion, so the similar model can be used to test the real ship’s ultimate strength.