| It is very important that develop shipping application software interface standard , development graph, network, multimedia foundation critical technology, developing CAD, manufacture, management integrated system through computer-aided shipbuilding integrated system technology. Whereas ship structural design is most important in the process of ship design. Using proper optimization technique and programming languages acquiring requisite design plotter program is very significant research and exploration based on AutoCAD2000 platform . Moreover, it is very miscellaneous and meticulous design.In this paper we present in detail the process of midship section design and drawn procedure , coding shipping section plane CAD application program through using Microsoft Visual C++6.0, objectarx2000 programming languages and using grade optimistic method of optimization method .software design adopt windows attribute dialog box and common dialog box alternate designed means ,people-computer interaction interface novelty, usableness. This paper supply one new mode clue on ObjectARX development technique that apply to ship design.The research includes followings:1 .With grade optimistic method , ascertain design variable and constraint condition and objective function, set up shipping midship section's mathematical model. With ObjectARX and VC ++6.0 programming languages , code cross section optimize procedure. So as to panel material equitable distribute and conform to examination require.2. With ObjectARX2000 block list and layer table function , use corresponding class library , set up development program about chart layer, shape mode, color, scale, Using parameter developing and drawing simple sectional drawing.3. Through attribute dialog box technology of windows, develop steelsections sectional basic calculation program .4. Accomplish memory ,query, use of pattern data and design parameter data.Finally, whole working is summarized and expected farther working is presented.
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