Deformation Mode Analysis for Structural Rigidity Evaluation
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Solution Overview
Problem
Existing deformation mode analysis methods struggle to accurately analyze complex three-dimensional structures experiencing coupled bidirectional bending or torsion, as they are influenced by local deflections and damage, making it difficult to evaluate deformation over the entire length of members in structures like construction, home appliances, and vehicles.
Innovation Solution
A deformation mode analysis method that separates structures into regions, calculates deformations for each region, and uses vectors and angles to quantify translational and rotational displacements, allowing for precise evaluation of three-dimensional deformation modes, including bidirectional bending and torsion, by setting displacement extraction points and calculating changes in these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If general deflection measurement methods are used to assess member deformation, then measurement simplicity is maintained, but measurement precision deteriorates due to inability to detect complex three-dimensional deformation modes
Solution Approach 1:
The patent segments the structure into multiple regions and further divides each region into multiple analysis targets (nodes). By calculating deformation modes for each node individually and synthesizing the results, the method achieves comprehensive three-dimensional deformation analysis without requiring complex global measurement systems. This segmentation approach enables precise detection of localized deformation modes including bidirectional bending and torsion.
2Weight of moving object
If members are made thin to save materials and reduce weight, then weight reduction is achieved, but rigidity deteriorates making deformation analysis more difficult
Solution Approach 1:
The patent calculates deformation modes based on changes in displacement parameters at multiple nodes before and after deformation. By focusing on parameter changes rather than absolute values, the method can accurately assess deformation in thin members with low rigidity. The deformation mode calculation uses displacement differences to determine bending and torsion components, enabling effective analysis regardless of member thickness.
3Measurement precision
If local deflection measurements are taken to assess member deformation, then measurement simplicity is maintained, but measurement precision deteriorates due to influence from local damage and installation surface deformation
Solution Approach 1:
The patent merges deformation information from multiple nodes within the same region to calculate regional deformation modes. By combining displacement data from multiple measurement points and synthesizing the deformation modes through calculation, the method obtains a comprehensive view that eliminates local anomalies. This merging approach filters out the influence of local damage and installation surface deformation through data synthesis.
4Measurement precision
If existing deformation analysis methods are used for complex three-dimensional structures, then analysis simplicity is maintained, but analysis precision deteriorates due to inability to analyze coupled bidirectional bending or torsion
Solution Approach 1:
The patent introduces deformation mode calculation as an intermediary process that transforms raw displacement measurements into meaningful deformation characteristics. By calculating bending modes and torsion modes as intermediate results from node displacement differences, the method enables detection of complex three-dimensional deformation patterns. This intermediary calculation step converts difficult-to-interpret displacement data into clear deformation mode information.
Data Source
AI summary
A deformation mode analysis method for a member of a structure is a method of analyzing a deformation mode of each member by performing structural analysis or a structural test on a structure including a single member or a plurality of members. In this method, the deformation mode of the structure is analyzed by separating the structure into a plurality of regions and calculating deformations for every separated region.