Carrier-rocket-oriented method for simplifying fluid and solid coupling simulation geometric models

Abstract

The invention discloses a carrier-rocket-oriented method for simplifying fluid and solid coupling simulation geometric models. The carrier-rocket-oriented method includes steps of 1), retrieving all components in assemblies and rejecting the components in unqualified shapes; 2), selecting optional one sheet to be used as a center, retrieving surrounding sheets and combining the sheets with the selected sheet to form a closed body; 3), retrieving factors of all the components under the assemblies, selecting geometric features, selecting geometric feature faces by means of feature recognition and labeling or deleting attributes for the geometric feature faces; 4), selecting the geometric features, setting size thresholds, comparing the sizes of the selected geometric features to the size thresholds and rejecting the geometric features which do not conform to requirements; 5), judging whether geometric simplification is used for hydrodynamics profession or not; 6), computing encircling boxes of the components, solving integral shapes of the assemblies and shelling the integral assemblies to obtain geometric shapes of the integral assemblies; 7), selecting updated assemblies, and creating spatial domains so as to complete geometric simplification work oriented to fluid and solid coupling simulation. The geometric feature faces selected by means of feature recognition at the step 3)correspond to the geometric features selected at the step 3).

Description

technical field [0001] The invention relates to the technical field of aerospace product system simulation, in particular to a method for simplifying a fluid-solid coupling simulation geometric model for launch vehicles. Background technique [0002] CAD (Computer Aided Design) 3D design software and CAE (Computer Aided Engineering) analysis and simulation software are tools that have been widely used in the design process of launch vehicles. In order to realize data sharing among different software systems, some integrated application development has been carried out. The results Significant improvement. But overall, the design analysis process from CAD to CAE is not very smooth. In a nutshell, CAD models are oriented to the manufacturing process, and are rich in details and large in scale, while CAE models need to be appropriately simplified and idealized. How to convert CAD models into source models required for CAE simulation has become a difficult point in data sharing...

AI Technical Summary

Problems solved by technology

[0007] (2) Lack of model conversion templates suitable for different models and specialties to support rapid simulation modeling analysis

[0008] In the process of CAE simulation analysis of launch vehicles, modeling work is usually carried out according to the needs of different models and different professions. Due to the complexity of the problem object, there are large differences in tools and methods, and the granularity of the geometric model is different, which is not conducive to coupling simulation. Analysis, there are design quality risks; it is not conducive to the exploration of complex problem mechanisms and knowledge innovation, and slows down the development of multi-disciplinary and deep-level aspects

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