Structural Health Monitoring Under Consideration of Uncertain Data (D)

In the paper an approach for structural health monitoring is introduced comprising uncertain structural analysis, assessment of damage and performance by uncertainty-indicators as well as prognosis of structural behavior and lifetime. This approach is referred to as numerical structural monitoring and may be supported by results of in-situ monitoring. Numerical structural monitoring is based on nonlinear structural analysis considering the comprehensive load and modification process. This process generally depends on uncertain data which are assessed by means of imprecise probabilities. Here, the imprecision is modeled with fuzzy parameters. This leads to the generalized uncertainty model fuzzy randomness representing the basis for the uncertainty measure fuzzy probability. A fuzzy stochastic analysis considering time-variant uncertain data has been developed to take into account fuzzy randomness of the load and modification process within the numerical structural analysis.

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