Development Of CAD Software For Greenhouse Structure

There is a large variety of greenhouse facilities, which develop rapidly. Currently, the design of greenhouse mainly bases on manual counting or previous design experience. However, this method is very cumbersome. It may also increase the cost and affect the security of the structure. However, using Computer Aided Design software is a good way to compensate these shortages. But it is a pity that so far ,there is rarely such CAD software designed for Greenhouse structure, and the function of those software need much improvement. So, research and development of this kind of greenhouse structure is much necessary, and that will be economic beneficial and effective to society.The research is studied around software of greenhouse structure(CAD). This software is developed base on Visual C++6.0 and CFG graphic platform with technology of Object-Oriented. This research primary contents as follows.A new quick modeling way is used. According to types of Greenhouse, generating model files, then models have been established. This party uses ways of human-computer interaction. Users only need input a few parameters, then models of Greenhouses are established. Besides, users could modify modeling files to establish models they need.Establishing file that contends all kinds parameters of sections, calling programs established, the structure optimization part of software is established. Other software for Greenhouse structure can not.Loads and structure calculation are worked; members of structures are designed. Interface programs are compiled.A way of drawing construction drawing is used in this program. Processing original construction drawings is to establish modeling drawings. New construction drawings are draw with modifying modeling construction drawings. Drawing. Jiont details and construction drawings are draw with calling CFG graphic program.The CAD software for Greenhouse structure has applied to many practical projects, which showed its application properties.