针对长甲板室纵向围壁端部与主船体露天甲板交界处的应力集中问题，采用结构有限元数值分析方法，探讨在空间布置受到限制的条件下，应力集中交界处圆弧型肘板臂长、圆弧半径等参数变化对应力分布和大小的影响，并得到降低应力集中系数的圆弧型肘板参数的最佳值。文中根据研究结果，对某艘实船的长甲板室纵向围壁端部与主船体露天甲板交界处圆弧型肘板进行优选设计，有效地降低了该处的应力集中水平。
Long deckhouse casing ends often have stress concentration problems, and such a problem can be alleviated through planting a circular-arc bracket on the end of longitudinal deckhouse casing. In this paper, under the condition which the space layout of a ship is restricted, a study based on the structural finite element method is implemented to investigate the optimum effects of brackets with different sizes, namely bracket arm length and radius of circular-arc. According to the calculation results, two arms of a bracket should have equal length and the circular-arc radius has the optimal value so that an optimum design of circular-arc bracket can be presented. Based on the study results, an optimization design is carried out on a real ship by planting a circular-arc bracket in order to reduce the stress concentration on the connection of long deckhouse casing end and the main deck, which can serve as a good reference for production design.
2016,38(7): 6-10 收稿日期：2015-11-30
DOI：10.3404/j.issn.1672-7619.2016.07.002
分类号：U661.4
作者简介：赖蕾(1992-),女,硕士研究生,主要从事船舶海洋结构设计相关研究工作。
参考文献：
[1] 何祖平, 王福花, 王德禹. 舰船上层建筑端部及舷侧大开口应力集中分析和光弹性实验[J]. 中国造船, 2006, 47(1):84-89.
[2] 陈倩. 铝合金上层建筑参与总纵弯曲的有效程度研究[D]. 上海:上海交通大学, 2011.
[3] 李源源, 孙巍. 长桥楼上层建筑结构设计分析[J]. 中国舰船研究, 2014, 9(3):57-61, 68.
[4] WU Wei-guo, DUAN Hong, PEI Zhi-yong, et al. Experiment research of stresses along the junction lines between the superstructure and the deck[J]. Journal of Ship Mechanic, 2002, 6(3):62-68.
[5] 赵尚辉, 黄守成. 某平底浅吃水船上层建筑应力集中分析及改善措施[J]. 船舶工程, 2006, 28(6):28-30.
[6] 朱云翔. 长上层建筑结构设计有关问题的探讨[J]. 船海工程, 2013, 42(3):29-33.
[7] 中国船级社. 钢质海船入级与建造规范[M]. 人民交通出版社, 2012.
[8] 田旭军, 闫国强, 胡刚义. 基于遗传算法的肘板结构型式优化[J]. 中国舰船研究, 2007, 2(2):23-26. TIAN Xu-jun, YAN Guo-qiang, HU Gang-yi. Optimization of bracket plate using genetic algorithm[J]. Chinese Journal of Ship Research, 2007, 2(2):23-26.
[9] 史战新. 基于Ansys子模型法的肘板结构优化[J]. 舰船科学技术, 2014, 36(8):19-26. SHI Zhan-xin. The bracket structure optimization based on ansys sub-model method[J]. Ship Science and Technology, 2014, 36(8):19-26.
[10] 杨代盛. 船体强度与结构设计[M]. 北京:国防工业出版社, 1982.
