Non-Circular Beam Contact Entity Generation for Simulation Accuracy
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Solution Overview
Problem
Existing CAD software methods for simulating beam elements assume circular cross sections for computational simplicity, which leads to inaccurate modeling and simulation of physical behavior, especially during contact events, as they do not account for the actual cross-sectional geometry of beam elements.
Innovation Solution
The method automatically generates contact entities based on the cross-sectional geometry of beam elements, creating a mesh that represents the surface geometry and constrains motion to accurately simulate contact behavior, allowing for more realistic modeling of non-circular cross sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If circular cross sections are assumed for beam elements, then computational simplicity is achieved, but accuracy of contact behavior modeling deteriorates
Solution Approach 1:
The beam element surface is segmented into multiple discrete contact entities (nodes, edges, faces) that collectively represent the actual cross-sectional geometry. This segmentation allows the complex non-circular surface to be broken down into manageable computational elements while preserving geometric accuracy for contact detection.
Solution Approach 2:
The invention changes the geometric parameters from a simplified circular assumption to actual cross-sectional parameters (width, height, orientation) by generating contact entities that reflect the true beam geometry. This parameter transformation enables accurate contact modeling without requiring complex full 3D meshing.
2Measurement precision
If actual cross-sectional geometry is modeled for beam elements, then accuracy of contact behavior modeling is improved, but computational complexity increases
Solution Approach 1:
The invention extracts only the essential contact-relevant geometric features from the full 3D beam model by generating contact entities that represent the outer surface geometry. This extraction process removes unnecessary internal details while retaining the critical surface information needed for contact detection, reducing computational complexity.
Solution Approach 2:
The invention transitions from 3D volumetric meshing to a 2D surface-based contact entity representation. By defining contact nodes, edges, and faces on the beam surface without requiring full 3D solid elements, the computational dimensionality is reduced while maintaining contact accuracy.
3Ease of operation
If circular cross sections are assumed, then ease of operation in simulation is maintained, but manufacturing precision representation deteriorates
Solution Approach 1:
The contact entity generation system is designed to handle multiple cross-sectional geometries (circular, rectangular, I-beam, custom profiles) through a unified process. This universal approach maintains ease of operation by using the same automated workflow while improving manufacturing precision by adapting to the actual beam profile type.
Solution Approach 2:
The invention creates a simplified copy of the beam's outer surface geometry in the form of contact entities that replicate the essential contact characteristics. This copying process captures the manufacturing precision of the actual beam profile without requiring the full complexity of the original geometry, maintaining simulation ease of operation.
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3C
AI summary
Embodiments of the present invention allow computer-aided design (CAD) software users to accurately model contact behavior of a real-world object with minimal simulation overhead. An embodiment automatically generates contact entities to represent extremities of a surface of a beam element model according to an indicated cross-sectional geometry of the beam element model. A mesh is established based on the automatically generated contact entities to represent geometrical aspects of the surface of the beam element model. A simulation, where the mesh is constrained according to aspects of the beam element model, is then performed to determine contact behavior of the real-world object.