基于知识的船舶结构快速有限元建模方法  

Knowledge-based fast finite element modeling method for ship structures

作　　者：罗文俊 李春通 韦朋余 王德禹[2,3] LUO Wenjun;LI Chuntong;WEI Pengyu;WANG Deyu(COSCO Shipping Specialized Carriers Co.,Ltd.,Guangzhou 510623,China;State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Institute of Marine Equipment,Shanghai Jiao Tong University,Shanghai 200240,China;China Ship Scientific Research Center,Wuxi 214028,China)

机构地区：[1]中远海运特种运输股份有限公司,广东广州510623 [2]上海交通大学海洋工程全国重点实验室,上海200240 [3]上海交通大学海洋装备研究院,上海200240 [4]中国船舶科学研究中心,江苏无锡214028

出　　处：《中国舰船研究》2024年第6期35-44,共10页Chinese Journal of Ship Research

基　　金：中央高校基本科研业务费专项资金资助项目(26822212)。

摘　　要：[目的]针对船舶结构有限元分析过程中创建有限元模型耗时且严重依赖工程师经验的问题,提出一种基于知识和几何模型特征的快速有限元建模框架。[方法]该方法充分利用CAD系统现有的模型数据,通过模型特征实现CAD与CAE系统之间的模型数据共享。首先,基于专家知识对CAD几何特征进行工程语义标记,生成CAD信息模型;然后,基于构建的知识规则对CAD信息模型进行特征约简;最后,采用XML中性文件构建基于知识的数据传递和匹配方法,将几何特征和属性信息与预先构建的CAE参数化模板进行匹配,快速实现船舶结构的有限元建模。[结果]以某66000 DWT散货船典型装载工况的舱段结构强度计算分析为例,所提方法可以实现几何模型、边界条件等信息的自动提取、标记以及模型自动约简,通过基于知识的特征匹配规则快速实现结构有限元建模及分析,有效减少了数据传递过程中丢失并实现知识重用。[结论]通过嵌入知识重用规则搭建的船舶结构快速有限元建模方法,提高了CAD与CAE系统之间数据、信息、知识的转换效率,在实际工程中具有良好的通用性和可扩展性。[Objective]As creating finite element models for the finite element analysis of ship structures is time-consuming and highly dependent on engineers' experience,this paper proposes a knowledge-based fast finite element modeling method to solve this problem.[Methods]The proposed method makes full use of the existing model data of the CAD system and shares model data between the CAD and CAE systems through model features.First,based on expert knowledge,the CAD geometric features are marked with engineering semantics to generate CAD information models.Second,the feature reduction of the CAD information model is carried out based on the constructed knowledge rules.Finally,the neutral file XML is used to construct a knowledge-based data transfer and matching method which allows the geometric features and attribute information to be matched with the pre-constructed CAE parameterized template,thereby speeding up the finite element modeling of the ship structure.[Results]Taking the structural strength analysis of a 66 000 DWT bulk carrier under typical loading conditions as an example,this approach can realize the automatic extraction,labeling and model reduction of the geometric model,boundary conditions and other information,and quickly complete the finite element modeling and analysis of the structure through the knowledge-based feature matching rules,effectively reducing data loss in the transmission process and realizing the reuse of knowledge.[Conclusions]The proposed fast finite element modeling method with embedded knowledge reuse rules improves the conversion efficiency of data,information and knowledge between the CAD and CAE systems,and has good universality and expansibility in practical engineering.

关 键 词：船体结构 知识工程 船舶设计 CAD/CAE 有限元法 

分 类 号：U661.4[交通运输工程—船舶及航道工程] U662.2[交通运输工程—船舶与海洋工程] TP391.9[自动化与计算机技术—计算机应用技术]