Internal Load Calculation Using Precomputed Damage Response Matrices
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Solution Overview
Problem
The high calculation load involved in determining internal loads on aircraft components during strength analysis, particularly when damage occurs, necessitates a reduction in computational complexity.
Innovation Solution
An internal-load calculation apparatus and method that utilize a memory to store preliminary analysis results and a calculator to reduce the calculation load by retrieving and modifying these results based on external load distributions, allowing for efficient determination of internal load distributions upon damage occurrence, using a damage detector and preliminary analyzer to simulate damage scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If finite element method is used to analyze strength of aircraft components, then analysis accuracy is improved, but calculation load increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing influence coefficient matrices that represent the relationship between external loads and internal loads for various damage scenarios. These pre-computed matrices are stored in memory, allowing the system to quickly retrieve and combine them during actual analysis without performing full finite element recalculations, thus reducing calculation load while maintaining accuracy
Solution Approach 2:
The patent uses copying by creating simplified representations of the complex finite element model through influence coefficient matrices. Instead of repeatedly executing full finite element analyses, the system copies the essential load-transfer relationships into pre-computed matrices that can be efficiently combined to determine internal loads under various damage conditions
2Measurement precision
If full finite element analysis is performed for each damage scenario, then internal load distribution accuracy is improved, but analysis time increases
Solution Approach 1:
The system performs preliminary action by pre-calculating influence coefficient matrices for different damage locations and types before actual damage assessment. These matrices capture the structural response characteristics and are stored for rapid retrieval, enabling the system to quickly determine internal load distributions for detected damage scenarios without time-consuming full analyses
Solution Approach 2:
The patent applies dynamics by creating a dynamic, adaptive calculation approach where the system selectively combines pre-computed influence coefficient matrices based on the specific damage scenario detected. Rather than using a static full-analysis approach for every case, the system dynamically selects and combines appropriate pre-computed matrices to efficiently determine the internal load distribution for the specific damage condition
Data Source
AI summary
An internal-load calculation apparatus includes a memory and a calculator. The memory stores the results of a preliminary analysis of an internal load exerted on a member of interest in a sound condition. The calculator calculates, on the basis of the distribution of an internal load exerted on the member of interest upon the application of an external load to an element of interest and the results of the preliminary analysis stored in the memory, the distribution of an internal load exerted on the member of interest upon the occurrence of damage on the element of interest. The element of interest corresponds to at least one of a plurality of elements of the member of interest.