Convex Hull Stress Space for Structural Design Data Reduction
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Solution Overview
Problem
Current design methods using the three-dimensional finite element method (3D-FEM) for structure design result in conservative designs due to the enormous amount of stress time history data, making it difficult to extract critical stress data efficiently.
Innovation Solution
A design system and method that perform three-dimensional analysis of stress components on structures using 3D-FEM, calculating a design stress space that envelops all analysis results in a convex shape to extract critical stress data, reducing the number of data points needed for design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If stress data from 3D-FEM analysis is used for design, then design accuracy is improved, but the amount of data to be processed becomes enormous
Solution Approach 1:
The patent extracts only the critical stress data needed for design from the enormous amount of 3D-FEM analysis results. By identifying and extracting maximum stress values and their corresponding locations, the system reduces the data volume while maintaining design accuracy.
Solution Approach 2:
The patent introduces an intermediate processing step that acts as a mediator between the 3D-FEM analysis results and the design process. This intermediate step involves calculating maximum stress values, identifying their locations, and selecting critical data points, thereby reducing the data burden on the design process.
2Device complexity
If maximum stress values are extracted for design, then data processing is simplified, but conservative design results occur due to simultaneous maximum values of different stress components
Solution Approach 1:
The patent performs preliminary analysis to determine the phase relationships between different stress components before final design decisions are made. By calculating the phase difference between stress components in advance, the system can identify whether maximum values occur simultaneously or at different times, avoiding overly conservative designs.
Solution Approach 2:
The patent changes the approach from simply extracting maximum values to considering the temporal and spatial relationships between different stress components. By introducing phase difference calculation and location comparison, the system transforms the parameter selection process to achieve more rational design results.
3Measurement precision
If all stress time history data is processed, then complete analysis is achieved, but calculation time becomes enormous
Solution Approach 1:
The patent extracts only the essential information from the complete stress time history data - specifically the maximum stress values, their locations, and phase relationships. This extraction approach maintains analysis completeness for design purposes while dramatically reducing the data volume that requires detailed processing.
Solution Approach 2:
The patent applies partial action by processing only the necessary portions of the stress time history data. Instead of analyzing every data point in detail, the system focuses on extracting maximum values and their relationships, achieving sufficient analysis completeness with reduced calculation time.
Data Source
AI summary
A design system that assists in a design of a structure to be designed by using a three-dimensional finite element method, includes: a calculation unit that performs three-dimensional analysis of a component of a stress acting on the structure with respect to earthquake input based on design data related to a configuration of and load on the structure, calculates a history indicating a relationship between stresses of two or more components acting on the structure, sets a design stress space so as to envelop a region containing the history in a convex shape, and calculates a first design stress acting on a cross section of the structure based on the design stress space.