破损船体极限强度非线性有限元分析

本文基于通用有限元系统,结合船体破损机理和初始缺陷处理方法,建立船体极限强度非线性有限元分析的完整框架.利用对水面舰船和双壳油船极限强度模型试验的比较验证,合理解决非线性有限元分析的关键技术,并对完整和破损船体极限强度进行非线性有限元法分析.然后,在模型试验和非线性有限元分析的基础上提出面向设计的适合破损船体和双向弯曲状态的船体极限强度分析的改进解析方法.

Nonlinear finite element analysis of ultimate strength of damaged ship hulls

Based on general finite element system and coupled with ship hull damage and initial imperfections treatments,an integrated framework of nonlinear finite element analysis of ultimate strength of ship hulls is established.The key matters of nonlinear finite element analysis are solved using verifications by mode tests simulating large surface ships and double hull tankers and nonlinear finite element analysis of ultimate strength of intact and damaged ships is performed.Then,an advanced analytical method of ultimate strength analysis that is design-oriented and is suitable for damaged ship hulls and bi-axial bending is proposed on the basis of model tests and nonlinear finite element analyses.