以型线图为数据输入的CATIA船体建模方法

CATIA modeling method of ship hull with hull line as data input

[目的]为简化船体建模步骤,提高建模效率,提出一种基于型线图快速实现船体模型创建的方法。[方法]该方法基于CATIA平台,利用应用组件架构(CAA)开发工具进行二次开发。首先,通过读取型线图中型线的几何元素和标注信息,实现型值点由二维到三维的转换;然后,在此基础上完成型线和船体艏、艉圆弧的创建,获得三维线框模型;结合CATIA原生曲面创建命令完成船体三维建模。最后,通过实例对开发的型值提取和艏圆弧生成程序进行稳定性和可靠性验证。[结果]结果显示,编制的程序能够实现型值点、横剖线、水线、纵剖线及除舷墙顶线外其他边界线的自动创建,利用艏圆弧生成程序创建的圆心线和切点线具备易修改、便于用户操作等特点。[结论]根据验证结果可见,以船体型线图为数据输入,结合“创成式模块”和“工程图模块”创建船体模型的方法是稳定可靠的,能够实现船体快速建模,具备一定的实用价值。

[Objective]To simplify the ship modeling process and improve modeling efficiency,this paper proposes a method for rapidly implementing hull model creation based on hull line drawing.[Methods]Using the CATIA platform,this method adopts the component application architecture(CAA)development tool for secondary development.First,by reading the geometry elements and label information of the hull lines in a drawing,the transformation of the offset points from 2D to 3D is realized.On this basis,the creation of the hull lines,stern and bow is completed,and a 3D wireframe model obtained.Finally,the hull 3D modeling is completed in conjunction with the CATIA native surface creation command.The stability and reliability verification of the developed type value extraction and bow generation program is then carried out via application analysis.[Results]The results show that the compiled program can realize the automatic creation of offset points,transverse lines,waterlines,profile lines and other boundary lines except the top line of the wall,and the centerline and tangent lines created by the bow generator are easily modified and simple for users to operate.[Conclusions]The verification results show that the method of a creating hull model using"Generative Shape Design"and"Drafting"with the hull line drawing as the data input is stable,reliable and able to realize rapid hull modeling,giving it certain practical value.