A Study on a Product Modeling Available for CAD and CAM

本文研究了同时适用于CAD和CAM的造船数据建模问题。在船舶设计的第一阶段使用时，模型应该非常简单，非常容易改变。同时，模型应具有较强的分区、尺寸、精度等表示能力。本研究建立了基本设计阶段的数据模型和为生产添加信息的系统。对于第一阶段数据模型，船体结构用曲面集合来表示。它非常适合于船舶的基本设计，因为总布置可以很容易地设计和更改。第二个系统可以给出第一个系统得到的模型的详细信息，以表示零件。该系统基于面向对象的编程，在SmallTalk-80环境下实现。将该系统应用于简化后的船舶结构，验证了该系统的有效性。

In this research, the shipbuilding data modeling available for both CAD and CAM was investigated. The model should be very simple and very easy to change when it is used in the first stage of the ship design. At the same time, the model should have a considerable capability to represent partitioning, dimensions, precision and others.In this research, the data model for the basic design stage and the system to add the information for the production were made. As for the first stage data model, the ship structure was represented by the set of surfaces. It is very suitable for the basic design of the ship, for the general arrangement can be designed and changed very easily. And the second system can give the detailed information to the model obtained by the first system to represent the parts.The system was based on the object-oriented programming and made on the Smalltalk-80 environment. The system was applied to the simplified ship structure and exemplified its ability.