Application of 3D CAD Technology in Ship Design (3)

2.3.10 Iron habitat design system The ship iron habitat design system is an auxiliary device and equipment for handling the fixed positioning of all kinds of equipment, pipes, air ducts, cables and other systems and the unimpeded walking of each cabin of the ship. Three-dimensional modeling design of the iron truss parts such as brackets, cable guides, duct hangers, pedestals, windows, ladders, guardrails, etc., and corresponding production information, as well as the positioning of the iron boat in the three-dimensional modeling of ship design Information is required. This system is the basic design system required for all majors in ship design.

2.3.11 XC production design system The coating production design system is the basis for setting the coating principle process. The hull model is introduced. According to the different stages and requirements of the hull painting, the coating compartment is divided and the coating is automatically calculated. Area, and according to the painting area and painting process information, the painting construction drawings and tables are generated for on-site use as the basic information for painting production management for production use.

3 main features of the system

3.1 Independent copyrighted graphics platform The graphics platform is developed on the basis of OpenGL, so that the application system on this platform can be changed without changes of the third-party graphics platform, which brings great impact on the stable operation and maintenance of the application system. Convenience. More importantly, users do not have to pay for upgrades due to upgrades or changes to third-party graphics platforms, thereby reducing user expenses. Similarly, the development of the self-developed graphics platform can be controlled by the third-party software technology, and the development of the system adopts the object-oriented design method, which makes the development of the design system more promising.

3.2 Hull and habitat model Establish a relatively complete topological relationship system to establish a complete two-dimensional model of hull and boat with topological relationship. In the hull model, any component parts are modified, and the parts in contact with each other can be automatically updated and modified; if the profile or orientation of a profile changes, the plate opening through which it passes can be automatically adjusted. Similarly, in the sun-loading model, any pipe modification, a series of pipe and pipe attachments in the same pipe number can be automatically corrected. This greatly reduces design errors caused by design modifications and improves the design quality.

3.3 Solid Modeling and Parametric Modeling The model system was developed using solid modeling and parametric modeling in consideration of the integrity of the plot and the special requirements for ship mapping. Parametric modeling can greatly reduce the workload of habitat modeling. In the parametric design, the r-connected information and the inverse calculation method are adopted, which greatly facilitates the user's design and interaction arrangement of the iron boat parts, and the positioning size and parameters can be automatically modified according to the installation environment.

3.4 Each professional model can be constructed by the interference inspection system. The hull structure, piping, air ducts, cables, and iron slabs are all stored in the same database in a uniform format. In the design-modeling, the designer can perform interference check on the hull structure, pipes, ducts, cables, and iron parts in various combinations, and find that the collision needs to perform interference check of the whole or partial model, thereby reducing the interference inspection time. .

3.5 The process simulation system for realizing part processing can process the generated parts according to different types of pipe bending machine parameters when generating pipe parts. If the simulation detects a part that does not meet the requirements of a specified bender process, it will automatically report an error. The system can also perform simulated cutting on the CNC cutting instructions of the sheet metal parting board generated by the hull to check whether the nesting board and the cutting path are reasonable, so as to avoid unnecessary losses in time.

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