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Geometric profile curved surface deformation method and system based on nested FFD control body

A technology for controlling body and shape, applied in geometric CAD, special data processing applications, design optimization/simulation, etc., can solve the problem that the control frame cannot achieve local deformation optimization, achieve refined deformation optimization design, and meet refined optimization design Effect

Pending Publication Date: 2022-04-15
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology

[0004] Purpose of the invention: Aiming at the problem that a single control frame in the prior art cannot achieve local deformation optimization, the present invention provides a geometric shape surface deformation method and system based on a nested FFD control body, which can realize the overall deformation of the geometric shape surface at the same time and local deformation

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  • Geometric profile curved surface deformation method and system based on nested FFD control body
  • Geometric profile curved surface deformation method and system based on nested FFD control body
  • Geometric profile curved surface deformation method and system based on nested FFD control body

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Embodiment Construction

[0053] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0054] The invention discloses a method for deforming a geometric shape curved surface based on a nested FFD control body, the geometric shape curved surface is the shape curved surface of an aerospace vehicle, or a ship, or an automobile, and the process flow is as follows figure 1 shown. In this embodiment, the method disclosed by the present invention is described by taking the shape of a ship of a certain type as an example, including the following steps:

[0055] S1. Establish a main FFD control volume and a sub-FFD control volume according to the initial geometric shape surface; the main FFD control volume is a control volume that surrounds the overall deformation area of ​​the geometric shape surface, and the sub-FFD control volume is a control volume that surrounds the geometric shape The control volume of the local deformation area of...

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Abstract

The invention discloses a geometric shape curved surface deformation method and system based on a nested FFD control body. A geometric shape curved surface is a shape curved surface of an aerospace craft or a ship or an automobile. A main FFD control body surrounding the overall deformation area of the curved surface of the geometric shape and a sub FFD control body surrounding the local deformation area are established, a nested FFD parameterization method is adopted, the local geometric shape is further parameterized, and overall deformation and local deformation of the curved surface of the geometric shape can be achieved at the same time.

Description

technical field [0001] The invention belongs to the technical field of engineering design and optimization, and in particular relates to a method and system for deforming a geometric shape curved surface based on a nested FFD control body. Background technique [0002] In recent years, the Free-form Deformation (FFD) method has been widely used in the optimization design process of geometric shapes due to its simplicity and flexibility, easy to maintain the topology and smoothness of the shape. The FFD method is mainly based on the idea of ​​elastic objects being deformed by force. The geometric shape data points to be deformed are enveloped in an FFD control volume. When the shape of the control volume is changed during deformation, the geometric shape data points in the control volume will change accordingly. . This process does not need to generate a geometric shape, does not need to have a strong geometric knowledge reserve, is simple to operate, and has good local defo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/20
CPCG06F30/15G06F30/20
Inventor 张代雨张曼玉朱信尧韩超帅王加夏鲍超明
Owner JIANGSU UNIV OF SCI & TECH
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