基于非均匀有理B 样条（NURBS）曲线组合算法，将自由曲线与解析曲线进行组合，构造了刚性充气式滑行艇的横剖面曲线，对复杂横剖面特征对应节点进行了特征提取及优化，采用改进蒙皮法生成光顺曲面，准确地构造了这种具有折角线和舷侧气囊的滑行艇型，为构造曲面复杂的船型提供了一种良好的解决方案和思路。通过对充气式刚性滑行艇曲面特征进行准确构造，可为船体曲面面元的自动划分、船舶CAD/CAM 表面板格划分、静力学计算和CFD 结构化计算网格生成等提供技术支撑。
The section curves of rigid inflatable planning boat are constructed by free curves and analytic curves based on NURBS curves combination algorithm. The feature extraction and optimization have been launched in the characteristics of the complex section points and improved skinning has also been applied in smoothing surface to precisely construct the planning hull form with knuckle line and broadside airbag. The above methods provide a good solution for constructing complex hull surfaces. It can be a great technical support for automatic partition of hull surface bin, surface block dividing by using CAD/CAM, statics calculation and the generation of constructed mesh in CFD.
[1] Piegl L A, Tiller W. The NURBS book[M]. Berlin: Springer, 1997.
[2] 施法中. 计算机辅助几何设计与非均匀有理B样条[M]. 北京: 高等教育出版社, 2001. Shi Fazhong. CAGD ＆ NURBS[M]. Beijing: Higher Education Press, 2001.
[3] 林焰, 纪卓尚, 戴寅生. 船体B样条曲面的数学描述及计算机方法[J]. 中国造船, 1996(4): 83-86. Lin Yan, Ji Zhuoshang, Dai Yinsheng. Mathematical description and computer method for B spline hull surface[J]. Shipbuilding of China, 1996(4): 83-86.
[4] 王承祥, 李元君, 黄天泽. 基于蒙皮法的NURBS自由曲面设计[J]. 湖 南大学学报: 自然科学版, 1996, 23(4): 77-81. Wang Chengxiang, Li Yuanjun, Huang Tianze. NURBS free- from surface based on skinning surface[J]. Journal of Hunan University: Natural Science Edition, 1996, 23(4): 77-81.
[5] Nam J, Parsons M G. Aparametric approach for initial hull form modeling using NURBS representation[J]. Journal of Ship Production, 2000, 16(2): 76-89.
[6] 仵大伟, 林焰, 纪卓尚. 船体曲面的NURBS表达与设计[J]. 大连理工 大学学报: 自然科学版, 2002, 42(5): 569-573. Wu Dawei, Lin Yan, Ji Zhuoshang. Ship hull surface's NURBS representation and design[J]. Journal of Dalian University of Technology:Natural Science Edition, 2002, 42(5): 569-573.
[7] 张萍, 朱德祥, 何术龙. 参数化的船型设计方法[J]. 中国造船, 2008, 49(4): 26-35. Zhang Ping, Zhu Dexiang, He Shulong. The parametric design method of hull form[J]. Shipbuilding of China, 2008, 49(4): 26-35.
[8] 张萍, 冷文浩, 朱德祥, 等. 船型参数化建模[J]. 船舶力学, 2009, 13 (1): 47-54. Zhang Ping, Leng Wenhao, Zhu Dexiang, et al. Parametric modeling approach of hull form[J]. Journal of Ship Mechanics, 2009, 13(1): 47- 54.
[9] 于雁云, 林焰, 纪卓尚. 船体曲面参数化设计新方法[J]. 中国造船, 2013, 54(1): 21-29. Yu Yanyun, Lin Yan, Ji Zhuoshang. A new method for parametric design of hull surface[J]. Shipbuilding of China, 2013, 54(1): 21-29.
[10] 陆丛红, 林焰, 纪卓尚. 基于NURBS表达的船舶静水力特性精确计 算[J]. 船舶力学, 2007, 11(5): 691-701. Lu Conghong, Lin Yan, Ji Zhuoshang. Precise calcution of ship hydrostatic performances based on NURBS shipform[J]. Journal of Ship Mechanics, 2007, 11(5): 691-701.
[11] 陆丛红. 基于NURBS表达的船舶初步设计关键技术研究[D]. 大连: 大连理工大学, 2005. Lu Conghong. Key technologies in preliminary ship design based on NURBS representation[D]. Dalian: Dalian University of Technology, 2005.
[12] 张明霞. 基于NURBS曲面的船舶破舱稳性计算方法研究[D]. 大连: 大连理工大学, 2002. Zhang Mingxia. Study of damage stability calculation with NURBS technology[D]. Dalian: Dalian University of Technology, 2002.
