| 引用本文: | 章志兵,毛祥新,孔海骄,孟凡冲,李巧敏,柳玉起.面向审核流程的船舶CAD系统建模方法研究[J].哈尔滨工业大学学报,2019,51(11):138.DOI:10.11918/j.issn.0367-6234.201801024 |
| ZHANG Zhibing,MAO Xiangxin,KONG Haijiao,MENG Fanchong,LI Qiaomin,LIU Yuqi.System modeling method research of ship CAD for audit process[J].Journal of Harbin Institute of Technology,2019,51(11):138.DOI:10.11918/j.issn.0367-6234.201801024 |
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| 面向审核流程的船舶CAD系统建模方法研究 |
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章志兵1,毛祥新1,孔海骄1,孟凡冲2,李巧敏1,柳玉起1
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(1.华中科技大学 材料科学与工程学院, 武汉 430074; 2.中国船级社技术研发中心, 北京100007)
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| 摘要: |
| 为提高船舶CAD建模效率,同时为CAE分析和船体结构设计程序（SDP）校核提供通用数据模型,设计并开发了一套面向审核流程的船舶CAD系统. 首先考虑审核流程的需求,采用几何与数据相结合的方式描述船舶模型,所有船舶构件均采用无厚度的几何片体表示. 其次建立包含发布模型、设计主模型和工具模型的三层板架模型,以板架属性的形式记录板架及其附属结构的几何关系,并结合自定义结构导航树、通用三维建模软件NX装配树和特征树组织管理板架及其附属结构. 然后基于轻量化数据库SQLite设计面向全生命周期的标准库系统,用来存储和管理船舶标准数据,确保快速查询. 最后通过参数化建模与基于自定义特征技术的结构建模方法,快速生成船舶模型. 该系统具有较强的交互性和稳定性,建模效率高且模型数据量小；模型经过数据转换可直接进行CAE分析和SDP校核,避免重复设计；数据库技术的使用实现了CAD、CAE和SDP模块间的数据共享,解决了数据分散不一致的问题；自定义结构导航树符合专业船舶设计人员的使用要求. |
| 关键词: 船舶CAD 三维建模 审核流程 参数化建模 结构建模 |
| DOI：10.11918/j.issn.0367-6234.201801024 |
| 分类号:U662．2 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51609089) |
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| System modeling method research of ship CAD for audit process |
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ZHANG Zhibing1,MAO Xiangxin1,KONG Haijiao1,MENG Fanchong2,LI Qiaomin1,LIU Yuqi1
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(1. School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; 2. China Classification Society Technology R&D Center, Beijing 100007, China）
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| Abstract: |
| To improve the efficiency of ship modeling and provide an original data model for CAE analysis and Structure Design Program (SDP) checking, a ship CAD system for the audit process is designed and developed. By considering the needs of the audit process, both the geometry and the data of the ship model are described, with all ship structures represented by zero-thickness sheet body. Besides, a three-laminated panel model including release model, master model and tool model is established to record the geometric relationship between the panel and its subsidiary structures in the form of panel attributes. The panel and its subsidiary structures are managed by combining the custom structure navigation tree and the assembly tree, the feature tree of the generic 3D modeling software NX. Furthermore, for storing and managing the ship′s standard data and ensuring inquiry efficiency, a standard library system for the whole life cycle is designed based on a lightweight database named SQLite. Finally, the ship model is generated quickly by parametric modeling and structural modeling based on custom feature technology. It is verified that the system proposed in this paper has strong interactivity and stability, and the modeling efficiency is improved with smaller amount of data. After the data conversion, the CAD model can be used directly by CAE and SDP, thus avoiding repetitive design. The use of database technology achieves data sharing between CAD, CAE and SDP modules and solves the problem of data inconsistent and dispersion. The custom structure navigation tree meets the requirements of professional ship designers. Keywords: ship CAD; 3D modeling; audit process; parametric modeling; structural modeling 〖FQ(+24mm。22,ZX-W〗收稿日期: 2018-01-04 基金项目: 国家自然科学基金（51609089） 作者简介: 章志兵(1978—）,男,博士,讲师； 柳玉起（1966—）,男,教授,博士生导师通信作者: 柳玉起,E-mail:liuyq@mail.hust.edu.cn 船舶工业的快速发展,使得船舶CAD技术成为缩短设计生产周期、提高产品质量和降低总体成本的有效方法[1-2]. 目前使用较为广泛的船舶三维设计软件主要有 TRIBON、CATIA、IntelliShip、NX、FORAN等[3]. TRIBON虽解决了船舶设计中面临的主要问题,但其软件封闭性较强,三维图形的拓扑造型能力较弱[4]；CATIA自带的模板数量较少,并且没有标准数据库[5]；IntelliShip和NX生成的模型数据量较大,操作、存储不方便并且降低软件的运行速度[6]；FORAN在生成外壳时需要用户输入大量信息,建模效率低[7-8]. 另外,上述软件缺乏对CAE预处理和SDP校核的针对性,不满足审核流程的需求. 基于NX软件开发平台,使用NX/Open MenuScript和NX/Open BlockUI Style进行软件菜单和界面设计,利用NX/Open API语言模块进行船舶CAD系统开发[9-10]. 基于标准数据库[11],通过结构建模和参数化建模方法,采用几何和数据相结合的方式描述船舶模型,使得模型数据量小且建模效率大大提高[12]. 同时面向审核流程,为CAE和SDP模块提供通用的原始数据模型,减少重复设计,实现数据共享. 1船舶CAD系统体系结构 |
| Key words: ship CAD 3D modeling audit process parametric modeling structural modeling 〖FQ(+24mm。22,ZX-W〗收稿日期: 2018-01-04 基金项目: 国家自然科学基金（51609089） 作者简介: 章志兵(1978—）,男,博士,讲师 柳玉起（1966—）,男,教授,博士生导师通信作者: 柳玉起,E-mail:liuyq@mail.hust.edu.cn |
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