以1艘超细长三体船为例,分析求解其在不规则波的运动及载荷响应。根据计算,对响应结果进行分析。计算结果表明超细长三体船片体较小,对船舶总纵弯矩及垂向剪力分布的影响较小。但由于船舶重心后移,总纵弯矩及垂向剪力的最大响应也略后移;计算得出的横向弯矩分布规律表明,三体船在船宽方向也可假设成两端简支的单跨梁,据此为校核三体船片体及主体连接结构提供依据。航速不同,导致三体船浮态不同。通过计算分析,得出适合示例三体船的最佳设计航速,可以为三体船设计提供帮助。
Taking an ultra-slendertrimaran as an example, it's motion and load response in irregular wave has been computed. The results show that the side hulls with light displacement slightly affect the distribution of the vertical bending moment and shear forceas the center of gravity for the trimaran shifts aftwards slightly. The results also indicate that the trimaran can be considered as a beam simply supported at both ends along the ship breadth. The transverse bending moment can be estimated to assess the connection structure of the mail hull and side hull. Different speeds result in different draughts. The calculation demonstrates that the speed of 29 kn is the best for the specific ship.
2016,38(3): 20-24,36 收稿日期：2015-09-07
DOI：10.3404/j.issn.1672-7619.2016.03.005
分类号：U674.951
作者简介：徐伟(1982-),男,工程师,主要从事船体结构规范研究、审图及水动力载荷计算等。
参考文献：
[1] DOCTORSLJ. Some hydrodynamic aspects of catamarans[J]. Transationsof Mechanical Engineering, 1991, 16(4):295-302.
[2] 许婷, 齐鸣. 三体战舰在英国下水[N]. 环球时报, 2000-06-30(4).
[3] 张亚萍, 译. 三体船-解决稳性问题的新颖设计方案[J]. 国外舰船工程, 2000(7).
[4] ACKERS B B, MICHAEL T J, TREDENNICK O W, et al. An investigation of the resistance characteristics of powered trimaran side-hull configuration[J]. Transactions-society of Naval Architects and Marine Engineers, 1997, 105:349-373.
[5] 上海交通大学海洋工程国家重点实验室. 多体船模型耐波性试验报告[R]. 上海:上海交通大学海洋工程国家重点实验室, 2001.
[6] 李培勇, 裘泳铭, 顾敏童, 等. 三体船阻力模型试验[J]. 中国造船, 2002, 43(4):6-12. LI Peiyong, QIU Yong-ming, GU Min-tong, et al. Experimental investigation on resistance of trimaran[J]. Shipbuilding of China, 2002, 43(4):6-12.
[7] 戴仰山, 沈进威, 宋竞正. 船舶波浪载荷[M]. 北京:国防工业出版社, 2007.
[8] 戴遗山. 舰船在波浪中运动的频域与时域势流理论[M]. 北京:国防工业出版社, 1998.
