针对水下装置保障船，介绍了3种尾部升降区域结构形式，对比分析在横开、横关及扭转工况下，3种尾部结构变形及应力水平差异；设计了箱梁抬高型与等高型2种门架结构，计算分析在固定和浮动起吊作业下，2种门架结构强度差异；应用船体梁法和有限元法，考察了两者反映船体总纵强度的异同点。结果表明：1）固桩室不延伸至舷侧时，尾部片体横向变形与片体间垂向错开变形量均较小，有效增强尾部结构刚度，避免尾倾，增大舷侧设备布置空间；2）抬高型门架结构强度更好，避免端部应力集中，降低焊接难度，增大起吊空间；3）目标船与常规船型静水载荷有明显差异，相比船体梁法，有限元法能综合反映船体关键区域结构应力，更利于指导关键区域结构设计。
For the underwater support vessel, three types of structural forms of the tail lifting area are introduced.Analyzing the deformation and stress level changes of the three types of tail structures under the conditions of transverse opening, transverse closing and torsion. Two kinds of gantry structure are designed, which are box-girder raised type and box-girder equal height type. The difference of structural strength between the two gantry structures is calculated and analyzed under fixed and floating lifting operations. The differences and similarities of hull beam method and finite element method in reflecting the total longitudinal strength of hull are investigated. The results show that: 1. For the structure of the pile chamber that does not extend to the side, the transverse deformation of the sheet and the vertical staggered deformation between the sheets are relatively small under all calculation conditions, which can effectively enhance stiffness of the tail structure, avoid the tail tilt, and increase the space of equipment layout on the side. 2.The structural strength of the raised gantry is better than that of the equal height type, avoiding the end stress concentration, reducing the difficulty of welding, and effectively increasing the lifting space; 3.The static water load of the target ship is obviously different from that of the conventional ship type. Compared with the hull beam method, the finite element method can comprehensively reflect the structural stress in the key area of the hull, and is more conducive to guiding the structural design in the key area.
2025,47(6): 21-26 收稿日期：2024-4-15
DOI：10.3404/j.issn.1672-7649.2025.06.004
分类号：U663.2
作者简介：李梦伟（1993 – ），男，硕士，工程师，研究方向为船舶结构设计
参考文献：
[1] 丁忠军, 李德威, 周宁, 等. 载人深潜器支持母船发展现状与思考[J]. 船舶工程, 2012, 34(4): 7-9+35.
[2] 中国造船工程协会. 船舶设计实用手册: 结构分册(第3版)[M]. 北京: 国防工业出版社, 2013.
[3] 中国船级社. 钢质海船入级规范[S]. 北京: 人民交通出版社, 2015.
[4] 林海花, 孙承猛, 周立师, 等. 多功能支持船波浪载荷研究[J]. 船舶, 2016, 27(1): 53-58.
[5] 肖桃云, 樊佳, 梅国辉, 等. 基于设计波法的舰船整船有限元强度分析[J]. 舰船科学技术, 2010, 32(6): 14-19+55.
[6] 陈庆强, 朱胜昌, 郭列, 等. 用整船有限元模型分析方法计算舰船的总纵强度[J]. 船舶力学, 2004(1): 79-85.
[7] 林瞳, 王醍, 杨东亚. 超大型自航绞吸式挖泥船结构设计与研究[J]. 船舶工程, 2019, 41(7): 16-22.
