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Research On The Key Technologies Of Planning & Laying And Graphic Processing For The Multi-types & Complex Pipeline Systems

Posted on:2003-01-14Degree:DoctorType:Dissertation
Country:ChinaCandidate:B CaoFull Text:PDF
GTID:1102360062485135Subject:Mechanical design and theory
Abstract/Summary:PDF Full Text Request
The multi-types & complex pipeline system planning & planning and management is a complex system engineering, that not only refers to the rational spatial planning, but also has a high requirement to the technology of CAD, information processing and cooperation work. For upgrading the qualities of multi-types & complex pipeline system design and management, and improving its design environment, research on some key theoretical, methodological and technological problems that affect multi-types & complex pipeline system planning and management is systematically developed in this dissertation. Firstly, the mathematical modelling method of optimization design for complex pipeline system packing is discussed. Secondly, a dynamical modelling strategy for information of multi-types & complex pipeline system' design and management is presented on the base of graphic objects' encapsulation. Then the abstraction problems of multi-types & complex pipeline system' spatial information description and expression in 2D design environment are solved. Following that, an automatically laying technology for pipeline system is researched. In the end, the reliability work modes supporting multi-types & complex pipeline system's cooperative design are studied and the correspondent management system of planning information is established. These methods and technologies have been used in a multi-types & complex pipeline system' design & management, and the expected results have been obtained.In chapter 1, the fundamental characteristics of pipeline system laying and information management are firstly analyzed, and the current research state in pipeline CAD and management technology is reviewed in the meanwhile. Then some emphasis problems and disadvantages existed in multi-types & complex pipeline system design and management are summarized. Finally the research contents, significance and technological routes of this dissertation are expanded, with which followed a brief introduction to the dissertation's architecture.In chapter 2, by defining some concepts, such as constraint unit, constraint aggregate, constraint relation, constraint method, constraint chain, constraint degree and associate constraint sub_aggregate etc. the basic constraint factors that affect the complex pipeline system packing are fully analyzed in the first. In the following, a mathematical modelling method used for complex pipeline system' optimization packing design is brought forth based on the optimization target decomposing, then a mode of generalized proposal field of the complex pipeline system packing design is constructed. Finally, a variant genetic algorithm for the solution of the mode mentioned above is derived.Design information modelling is an important problem in engineering design. Aimed at the shortage of information description of multi-types & complex pipeline system design and management in 2D environment, a dynamic modelling method for design and management information based on the object encapsulation is firstly presented in this chapter by defining all sort of design symbols in object. Following, the encapsulation models of different kinds of design symbols are designed distinguishingly in terms of their functional characteristics. In the end, facing the multi-types & complex pipeline system management, a mapping mechanism of object-relation mode is established.Aimed at the spatial information expressing disadvantages existed in 2D pipelines design and management, a new approach is proposed in chapter 4. By using it, the section mapping drawings of multi-types & complex pipeline system can be automatically generated through the entity crossing operation. This method composes of the following three key steps. In the first, different graphic entities are identified from the complex pipelines drawing in terms of the layer information they owned, then the correspondent information is to be encapsulated to keep the spatial data completeness of the graphic symbols. In the second, a provided virtual section is taken as the tool to ex...
Keywords/Search Tags:pipeline system, planning & laying, mathematical model, information modelling, section mapping drawing, geometry description, interference inspection, cooperation planning, underground pipelines
PDF Full Text Request
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