Construction method of product simulation three-dimensional model

Abstract

The invention provides a construction method of a product simulation three-dimensional model. The method is characterized by comprising the following steps: S1, acquiring prototype data of components, and obtaining physical attribute of the components; establishing a geometric model formed by a triangular patch model outputted by a CAD (computer aided design) system; S2, setting a constraint condition for assembling the components; S3, establishing assembly relation information of the components; generating an assembly relation information set of virtual components; S4, automatically searching the assembly relation information set of the component, finding characteristics of the component corresponding to the assembly relation information set, and realizing the assembly by virtue of the characteristics and the constraint relation between the component and the corresponding component characteristics; S5, simulating the physical attribute of the component. The design information is inputted into a real-time simulation virtual environment in the process for inputting the CAD data into the virtual environment, and the assembly relation information of the components is mapped to the real-time simulation virtual component model, so that the completeness of the design information of the components can be guaranteed.

Description

technical field [0001] The invention relates to a customer-oriented real-time simulation system applied to a high-end manufacturing industry, in particular to a method for constructing a product simulation three-dimensional model. Background technique [0002] According to the calculation of HIS, an American research institution, the total output of the world's manufacturing industry in 2010 reached 10 trillion US dollars. Among them, China accounts for 19.8% of the world's manufacturing output, slightly higher than the 19.4% of the United States. China has assumed the role of "world's factory", and the manufacturing industry is also China's largest industrial sector and an important part of the national economy. However, compared with the manufacturing industries of developed countries, my country's manufacturing industry has a low level of competitive advantage, weak innovation ability, lack of core competitiveness, high value-added products rely on imports, and productio...

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Problems solved by technology

[0007] 1. The triangular patch model loses the geometric information and topological information of the component model, making it difficult for designers to accurately analyze the product model in the virtual environment, mainly because this representation method causes the planarization of geometric features of arbitrary shapes , so it cannot accurately reflect the shape characteristics of the model in the virtual environment;

[0008] 2. A large amount of engineering design information contained in the product information model is lost. The loss of this information makes it difficult for the virtual assembly system to capture and maintain engineering information such as product design constraints, and it also brings difficulties in expressing and determining the assembly relationship between parts

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