Information model geometric lightweight method based on component reuse and reassembly
An information model and reassembly technology, applied in geometric CAD, 3D modeling, design optimization/simulation, etc., can solve problems such as difficult cross-platform integration applications, large resource occupation, and high redundancy of information model information, and achieve simplified geometry Effects of redundant information, implementation compression, avoidance of complexity and inefficiency
Active Publication Date: 2021-07-23
CHINA RAILWAY DESIGN GRP CO LTD
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Problems solved by technology
[0005] In order to solve the problem that information models are difficult to carry out cross-platform integrated applications due to high information redundancy and large resource occupation, this invention discloses a geometric lightweight method for information models based on component reuse and reassembly
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Embodiment 1
[0068] In order to verify the method of the present invention, the scaffold model used in the construction process of a certain railway engineering bridge is tested as an example. The scaffolding is a construction auxiliary facility used in the construction of "72+128+72" continuous beams. The overall space size of the model is 278 meters long, 16 meters wide, and 15 meters high, including 44 types of references and a total of 218,514 components. The original model is stored in IFC format, and the file size is 229M due to the use of parametric geometric modeling expression and object reference storage. The target platform of model integration is the 3D geographic information subsystem in the railway engineering construction management information platform (RIM).
[0069] The process of adopting the method of the present invention to reduce the weight of the scaffolding model geometry and the final integration effect are as follows: Figure 4 shown. After the model is integra...
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The invention discloses an information model geometric lightweight method based on component reuse and reassembly, which comprises the following steps: converting an information model into an IFC format and splitting the information model to a component level, and analyzing description information of a component in the IFC to obtain a geometric entity, a spatial relationship and a mapping relationship of the component; defining the obtained component geometric entity as a component reference model, selecting a proper geometric reduction processing method according to the geometric modeling characteristics, and replacing the specific modeling with a simple geometry to complete the geometric lightweight of the component reference model; and carrying out Euler conversion on the obtained component space relationship and multiplexing mapping relationship by using rotation matrix parameters to obtain a component assembly relationship, and re-integrating the obtained lightweight component reference model into a target platform according to the assembly relationship to complete geometric lightweight of the original complete information model. According to the method, the lightweight ratio of the model is high, and component type retrieval and spatial query are realized on the basis of realizing component decomposition, reuse and reassembly.
Description
technical field [0001] The invention belongs to the technical field of information model processing and optimization, and in particular relates to a geometric lightweight method of information models based on component reuse and reassembly. Background technique [0002] With the deepening application of railway engineering information model in the construction stage, it is urgent to integrate a large number of information models into the 3D geographic information platform for construction simulation and scheme display. While constructing the main body of the construction object, professional information modelers also build detailed construction auxiliary facility models to show the construction process and construction methods, but the construction auxiliary facilities formed by assembling a large number of similar components are often over-modeled. Compared with the main engineering model, the auxiliary facility model has a larger volume, higher resource occupation, and a s...
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Login to View More IPC IPC(8): G06F30/13G06F30/20G06T17/00
CPCG06F30/13G06F30/20G06T17/00
Inventor 范登科张恒王长进韩祖杰赵文王华宁新稳黄漪刘小龙王娇
Owner CHINA RAILWAY DESIGN GRP CO LTD