Structural Analysis Device for Comprehensive Reliability Evaluation
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Solution Overview
Problem
Existing methods for diagnosing structural deterioration, such as those described in PTL 1, primarily focus on predicting maximum deterioration and do not effectively evaluate both catastrophic and wear failures in structures, limiting their diagnostic capabilities.
Innovation Solution
An analysis device comprising a system identification unit that uses non-Gaussian random processes to model time evolution, an input modeling unit that generates probability models for input fluctuations, and a response calculation unit that derives vibration responses, enabling comprehensive reliability evaluation for both catastrophic and wear failures by calculating stress and fatigue strength reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If statistical distribution methods based on extrema of measured values are used for deterioration degree determination, then the maximum or minimum value of physical property can be estimated, but the method cannot effectively evaluate both catastrophic and wear failures simultaneously
Solution Approach 1:
The patent segments the reliability evaluation into two distinct components: catastrophic failure evaluation (using load strength reliability) and wear failure evaluation (using fatigue strength reliability). This segmentation allows each type of failure to be assessed with appropriate methods while maintaining overall comprehensive reliability evaluation.
Solution Approach 2:
The patent creates a universal diagnostic system that can evaluate both catastrophic and wear failures through a single comprehensive reliability assessment framework. The system integrates multiple evaluation methods (load strength model, fatigue strength model, damage accumulation model) to provide multi-functional diagnostic capability.
2Measurement precision
If recursion period based statistical distribution is used to predict maximum deterioration value, then deterioration degree can be determined, but the diagnostic technique lacks versatility for evaluating different failure modes
Solution Approach 1:
The patent changes the evaluation parameters by introducing different reliability models for different failure modes. For catastrophic failure, it uses load strength reliability parameters; for wear failure, it uses fatigue strength reliability parameters and damage accumulation parameters. This allows precise measurement for each failure type while maintaining diagnostic versatility.
3Device complexity
If a single deterioration prediction method is used, then the analysis process is simplified, but it cannot provide comprehensive reliability assessment for both catastrophic and wear failures
Solution Approach 1:
The patent introduces dynamic selection of evaluation methods based on the failure mode being assessed. The system dynamically switches between load strength reliability evaluation, fatigue strength reliability evaluation, and damage accumulation evaluation depending on whether catastrophic failure or wear failure is being analyzed, providing comprehensive assessment without requiring a single overly complex method.
Data Source
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AI summary
Provided are an analyzing device and the like which enable highly accurate diagnosis of the state of a structure. This analyzing device is provided with: a system identifying means for identifying a model representing temporal evolution of a structure, on the basis of a distribution of responses of the structure; an input modeling means for generating a probabilistic model representing an input distribution, on the basis of data indicating a variation in an input to the structure; an input generating means for generating an input signal for the structure on the basis of the probabilistic model; and a response calculating means for obtaining an oscillating irregular response generated in the structure in relation to the input signal, on the basis of the model and the input signal.