基于极限承载能力的江海直达船中剖面结构优化研究
发布时间：2018-07-27 20:12
【摘要】：由于在营运周期和经济性方面的优势，江海直达船结构优化设计成为目前船舶研究中的热点。文章通过对船体极限强度和船体结构优化机理及实施方法的回顾与探讨，以江海直达船中剖面结构最轻化为目标，在满足《江海通航船舶建造规范》条件下，使用目前成熟的优化设计平台，对适用于基于江海直达船极限承载能力的结构优化问题的优化策略及实现进行了研究。研究内容及成果如下： （1）通过对极限强度计算方法的研究，文章确定所采用的极限强度计算方法为简化计算方法和非线性有限元方法，并详细介绍了简化计算方法的计算过程；根据船舶结构优化特点及已有优化研究成果，文章选择模拟退火算法作为优化算法，利用优化设计平台Isight建立优化模型并进行计算及分析。 （2）根据极限强度简化计算方法原理，使用Fortran语言编制极限强度简化计算程序。使用简化计算程序对加筋板单元进行影响因素分析，通过对不同试验设计方法原理及计算结果比较，确定采用优化拉丁超立方方法进行试验采样进而进行灵敏度研究；对江海直达船中剖面结构因素进行分析并结合对加筋板单元影响因素研究成果，，确立中剖面结构优化设计变量、约束及目标，对中剖面结构进行了灵敏度计算分析并根据灵敏度结果剔除部分设计变量后进行了初步优化计算。 （3）利用非线性有限元软件Abaqus提供的二次开发脚本接口，使用Python语言，依托参数化思想建立江海直达船中剖面结构有限元参数化建模及计算模型；结合前文研究成果确定本文通过试验设计建立近似模型进而对近似模型进行优化计算的优化策略；建立基于近似模型的中剖面结构优化模型并进行优化计算；对优化结果整理验证并最终确定基于极限承载能力的江海直达船中剖面优化结构。
[Abstract]:Because of its advantages in operation cycle and economy, the optimal design of river and sea direct ship structure has become a hot spot in ship research. Based on the review and discussion of the ultimate strength of the ship and the optimization mechanism of the hull structure as well as the implementation method, this paper takes the minimum section structure of the river and sea direct ship as the objective, under the condition of meeting the requirements of the ship construction code for the navigation of the river and sea. Based on the mature optimal design platform, the optimization strategy and implementation of the structural optimization problem based on the ultimate load-carrying capacity of river-sea direct ships are studied. The research contents and results are as follows: (1) through the study of the ultimate strength calculation method, the paper determines that the calculation method is simplified method and nonlinear finite element method. The calculation process of simplified calculation method is introduced in detail, and according to the characteristics of ship structure optimization and the research results of existing optimization, the simulated annealing algorithm is selected as the optimization algorithm. The optimization model is established by using Isight platform. (2) according to the principle of simplified calculation method of limit strength, the simplified calculation program of limit strength is compiled by Fortran language. The simplified calculation program is used to analyze the influence factors of the stiffened plate element. By comparing the principle of different experimental design methods and the calculation results, the optimized Latin hypercube method is adopted to sample the test and the sensitivity is studied. Based on the analysis of the structural factors of the middle section of the river and sea direct ship and the results of the research on the influence factors of the stiffened plate element, the variables, constraints and objectives of the optimum design of the middle section structure are established. The sensitivity analysis of the middle section structure is carried out and some design variables are eliminated according to the sensitivity results. (3) the secondary development script interface provided by the nonlinear finite element software Abaqus is used in Python language. Based on the idea of parameterization, the finite element parameterized modeling and calculation model of the cross-section structure of the river and sea direct ship is established, and the optimization strategy of the approximate model is established by the experimental design and the optimization calculation of the approximate model by combining the previous research results. The optimization model of middle section structure based on approximate model is established and optimized calculation is carried out, and the optimized structure of middle section of river and sea direct ship based on ultimate load-bearing capacity is confirmed and verified by the result of optimization.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U661.4
本文编号：2149009
[Abstract]:Because of its advantages in operation cycle and economy, the optimal design of river and sea direct ship structure has become a hot spot in ship research. Based on the review and discussion of the ultimate strength of the ship and the optimization mechanism of the hull structure as well as the implementation method, this paper takes the minimum section structure of the river and sea direct ship as the objective, under the condition of meeting the requirements of the ship construction code for the navigation of the river and sea. Based on the mature optimal design platform, the optimization strategy and implementation of the structural optimization problem based on the ultimate load-carrying capacity of river-sea direct ships are studied. The research contents and results are as follows: (1) through the study of the ultimate strength calculation method, the paper determines that the calculation method is simplified method and nonlinear finite element method. The calculation process of simplified calculation method is introduced in detail, and according to the characteristics of ship structure optimization and the research results of existing optimization, the simulated annealing algorithm is selected as the optimization algorithm. The optimization model is established by using Isight platform. (2) according to the principle of simplified calculation method of limit strength, the simplified calculation program of limit strength is compiled by Fortran language. The simplified calculation program is used to analyze the influence factors of the stiffened plate element. By comparing the principle of different experimental design methods and the calculation results, the optimized Latin hypercube method is adopted to sample the test and the sensitivity is studied. Based on the analysis of the structural factors of the middle section of the river and sea direct ship and the results of the research on the influence factors of the stiffened plate element, the variables, constraints and objectives of the optimum design of the middle section structure are established. The sensitivity analysis of the middle section structure is carried out and some design variables are eliminated according to the sensitivity results. (3) the secondary development script interface provided by the nonlinear finite element software Abaqus is used in Python language. Based on the idea of parameterization, the finite element parameterized modeling and calculation model of the cross-section structure of the river and sea direct ship is established, and the optimization strategy of the approximate model is established by the experimental design and the optimization calculation of the approximate model by combining the previous research results. The optimization model of middle section structure based on approximate model is established and optimized calculation is carried out, and the optimized structure of middle section of river and sea direct ship based on ultimate load-bearing capacity is confirmed and verified by the result of optimization.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U661.4
【参考文献】
相关期刊论文 前10条
1 何福志,万正权;船体结构总纵极限强度的简化逐步破坏分析[J];船舶力学;2001年05期
2 李仲伟,吴有生,崔维成;基于有限元法的小水线面双体船结构优化[J];船舶力学;2005年02期
3 刘寅东;卞钢;;基于ANSYS的结构拓扑优化及其二次开发[J];船舶力学;2006年02期
4 郭小东;俞铭华;管义锋;胡嘉骏;朱酥骥;;基于相对差商法的大型油船中剖面结构优化[J];船舶力学;2007年04期
5 于雁云;林焰;纪卓尚;陆丛红;;基于参数化表达的船舶结构有限元分析方法[J];船舶力学;2008年01期
6 赵建军,俞铭华,吴剑国,管义锋;舰船多用结构优化设计系统OOS初探[J];华东船舶工业学院学报(自然科学版);2003年01期
7 黄重阳;林焰;于雁云;;基于响应面法的强力甲板结构优化设计[J];中国舰船研究;2012年03期
8 普建涛,王华昌,王耕耘,石立农,李志刚;几何约束系统求解策略的研究与实践[J];计算机辅助设计与制造;1999年05期
9 许华文,肖熙;基于模拟退火算法的舰船中剖面优化设计[J];上海交通大学学报;2000年01期
10 潘彬彬;崔维成;;基于有限元的整船结构多学科设计优化[J];中国造船;2010年01期
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