不连续纵舱壁结构冗余度分析及优化

Redundancy Analysis and Optimization Study of Discontinuous Longitudinal Bulkhead Structures

为保证船舶不连续纵舱壁结构的安全性和可靠性,基于《散货船和双壳油船协调共同结构规范》,对某型船的舷侧不连续纵舱壁结构冗余度进行分析,建立不连续纵舱壁结构局部有限元模型,采用ABAQUS准静态法对其进行极限强度计算,根据全船结构有限元强度直接计算方法得到完整结构和损伤结构的最大工作应力。结果表明:在波浪弯矩载荷作用下结构的冗余度没达到规范要求。在分析影响结构冗余度因素的基础上提出4种优化方案,优化方案可有效提高结构冗余度。研究成果可为不连续纵舱壁结构的设计提供一定参考。

In order to ensure the safety and reliability of the discontinuous longitudinal bulkhead structure of a ship,based on Code for Coordinated Common Structures of Bulk Carriers and Double Shell Oil Tankers,the redundancy of the side discontinuous longitudinal bulkhead structure of a certain type of ship is analyzed.A local finite element model of the discontinuous longitudinal bulkhead structure is established,and the ultimate strength calculation is carried out using the ABAQUS quasi-static method.The maximum working stress of the complete and damaged structures is obtained using the direct calculation method of the finite element strength of the entire ship structure.The results indicate that the redundancy of the structure under wave bending moment load does not meet the regulatory requirements.Based on the analysis of factors affecting structural redundancy,four optimization schemes are proposed,which can effectively improve structural redundancy.The research results can provide some references for the design of discontinuous longitudinal bulkhead structures.