船体结构强度评估是船舶建造与设计过程中的重要环节。本文在总结研究现有的船体结构有限元分析加载方式的基础上，提出基于剪流分布规律的节点力加载方式。对于为模拟船体梁载荷而在各剖面处施加的集中力以及为进行强度计算需在各剖面处施加的调整载荷，使用本文方法将其离散至单元网格节点处并于与加载，得到的结果符合船体梁弯曲时的应力分布规律，这对于正确进行船体结构强度评估具有重要意义。给出适用于计算机实施的规格化加载过程，以实现船体结构有限元分析的自动加载过程。
The analysis of the hull structural strength is the most important step of the ship building and design. Based on the researches about the existing loading methods of hull structural finite element (FE) analysis, the paper proposes the nodal force loading method by following shear flow distribution at the considered cross section. For the section's concentrated force which is used in simulating the hull girder load or adjusting load for strength calculation, making them to form the discrete nodal force by this method, the results conform to shear stress distribution when hull girder endure bending, which is significant in correct analysis of the hull structural strength. Furthermore, a standard loading format suitable for computers are given in this paper, which implement automatic loading process for hull structural analysis.
2017,39(3): 12-17 收稿日期：2016-06-21
DOI：10.3404/j.issn.1672-7619.2017.03.003
分类号：U663.2
作者简介：谢心(1992-),女,硕士研究生,研究方向为船体结构强度
参考文献：
[1] 陈庆强, 朱胜昌. 大型集装箱船整船有限元分析计算技术研究[J]. 船舶力学, 2006, 10(1):80-91.CHEN Qing-qiang, ZHU Sheng-chang. Research on numerical technique of whole large container ship by FEM[J]. Journal of Ship Mechanics, 2006, 10(1):80-91.
[2] 韩钰, 陈磊, 王伟飞, 等. 超大型集装箱船的结构设计[J]. 船舶与海洋工程, 2015, 31(4):10-17.HAN Yu, CHEN Lei, WANG Wei-fei, et al. The structural design of ultra large container ships[J]. Naval Architecture and Ocean Engineering, 2015, 31(4):10-17.
[3] 罗秋明, 薛鸿祥, 唐文勇. 45万吨级超大型矿砂船全船结构有限元分析[J]. 船舶工程, 2010, 32(2):8-12.LUO Qiu-ming, XUE Hong-xiang, TANG Wen-yong. Finite element analysis of ship structure of 450000DWT Ultra-Large ore carrier[J]. Ship Engineering, 2010, 32(2):8-12.
[4] 郑雷, 李小灵, 王亮. VLGC全船结构有限元分析研究[J]. 船舶工程, 2015, 37(1):28-31.ZHANG Lei, LI Xiao-ling, WANG Liang. FE analysis of global structure of very large gas carrier[J]. Ship Engineering, 2015, 37(1):28-31.
[5] 朱胜昌, 陈庆强, 江南. 大型集装箱船总纵强度计算方法研究[J]. 船舶力学, 2001, 5(2):34-42.ZHU Sheng-chang, CHEN Qing-qiang, JIANG Nan. Research on the calculating method of longitudinal strength of large container ship[J]. Journal of Ship Mechanics, 2001, 5(2):34-42.
[6] 胡毓仁. 图论在薄壁杆件构件计算中的应用[J]. 上海交通大学学报, 1989, 23(6):21-29.HU Yu-ren. The application of graph theory to structural calculation of thin-walled Bars[J]. Journal of Shanghai Jiaotong University, 1989, 23(6):21-29.
[7] 卢开澄, 卢华明. 图论及其应用(第二版)[M]. 北京:清华大学出版社, 1995.LU Kai-cheng, LU Hua-ming. Graph theory and its applications(2版)[M]. Beingjing:Tsinghua University Press, 1995.
[8] 李敏, 张世联. 基于PCL语言的船体剖面特性计算[J]. 舰船科学技术, 2014, 36(10):27-31.LI Min, ZHANG Shi-lian. Calculation of hull section characteristics based on PCL[J]. Ship Science and Technology, 2014, 36(10):27-31.
[9] DANIEL Y C. A graphic-algebraic computation of elementary siphons of BS3PR[J]. Journal of Information Science and Engineering, 2007, 23:1817-1831.
