CAD Model Shape Modification via Landmark Displacement
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Solution Overview
Problem
Current methods for modifying computer-aided design models are inefficient and inflexible, particularly for complex geometries, as they require time-consuming manual interaction and are limited in generating a large number of design variations with improved mechanical, physical, or aesthetic properties, and struggle with non-linear modifications and local resolution adjustments.
Innovation Solution
A method involving the placement of reference and adjustment landmarks to apply a homogeneous function of displacement to the CAD model, allowing for flexible and efficient generation of modified shapes, enabling linear and non-linear transformations without geometric or topological constraints, and enabling easy transformation of selected forms between objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods are used to modify CAD models, then geometric accuracy is maintained, but the process requires time-consuming manual interaction and cannot generate a large number of design variations efficiently
Solution Approach 1:
The system performs automatic surface and volume meshing without requiring manual expert interaction. The method self-adjusts parameters and generates design variations autonomously based on the input CAD model and optimization criteria, eliminating the need for repeated manual meshing operations
Solution Approach 2:
The method systematically varies design parameters to generate multiple design variations. By changing geometric parameters within defined ranges and automatically regenerating meshes, the system efficiently produces a large number of alternative designs for evaluation
2Manufacturing precision
If repeated surface and volume meshing is performed to generate design variations, then accurate mechanical and physical performance evaluation is achieved, but the process becomes particularly time-consuming
Solution Approach 1:
The method performs preliminary automatic meshing setup and parameter configuration before generating design variations. By pre-configuring the meshing process and automation rules, subsequent design variations can be evaluated without repeated manual meshing intervention
Solution Approach 2:
The method replaces manual expert meshing operations with automated computational algorithms. Software-based automatic meshing and parameter variation systems substitute for time-consuming manual mechanical meshing processes
3Extent of automation
If space deformation techniques are applied to adapt surface and volume mesh directly, then design optimization can be performed automatically, but the methods are limited by scalability and deformation quality
Solution Approach 1:
The method segments the deformation process into controlled steps with defined parameters. By dividing the overall shape modification into discrete, manageable deformation operations, the system achieves both automation and flexibility in generating design variations
Solution Approach 2:
The method employs dynamic parameter adjustment during the design optimization process. Deformation parameters can be modified adaptively based on evaluation results, allowing the automated process to maintain high flexibility and respond to optimization criteria changes
Data Source
AI summary
A method of determining a modified shape of a computer-aided design model of an object or a partition thereof is described. With the method, at least two reference landmarks are placed at a reference position with respect to the shape of the object or to the partition. An adjustment landmark is placed at the reference position of the corresponding reference landmark. The adjustment landmarks are displaced from the reference position to a modified position, and a displacement between the modified position and the reference position is obtained. The modified shape of the object or the partition is generated by modifying the shape of the object or the partition by applying a homogeneous function of the displacement to the computer-aided design model of the shape of the object or the partition.