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Uncertainty analysis of structural response under a random impact
The problem of the vulnerability of structures facing impacts came to the front line of the scientific scene in the last decades. Structural impacts usually present dangerous potential hazards, e.g. domino accident. Deterministic models are not sufficient for reliability analysis of impacted structures. Uncertainty of the environmental conditions and material properties have to be taken into account. The proposed research is devoted to the analysis of structural behavior under a variable impact loading. Bernoulli beam model is used as a structural model of a pipe or load-bearing element, while the contact -force formulation for impact is studied to simulate the wide range of possible types of debris. Model sensitivity is studied first. The influence of the impact force, its duration, position on structural behavior, as well as beam material are then considered. Uncertainty analysis of a single impact and several impacts are next considered. The obtained insights can provide the guidelines for modeling the structure under the debris loading taking into account the uncertainties. It was shown that determinist simulations of structural reliability under the impact are not enough. The impactors that can be considered “safe“ based on the deterministic simulation can affect structural integrity if their characteristics are slightly varying.
Uncertainty analysis of structural response under a random impact
The problem of the vulnerability of structures facing impacts came to the front line of the scientific scene in the last decades. Structural impacts usually present dangerous potential hazards, e.g. domino accident. Deterministic models are not sufficient for reliability analysis of impacted structures. Uncertainty of the environmental conditions and material properties have to be taken into account. The proposed research is devoted to the analysis of structural behavior under a variable impact loading. Bernoulli beam model is used as a structural model of a pipe or load-bearing element, while the contact -force formulation for impact is studied to simulate the wide range of possible types of debris. Model sensitivity is studied first. The influence of the impact force, its duration, position on structural behavior, as well as beam material are then considered. Uncertainty analysis of a single impact and several impacts are next considered. The obtained insights can provide the guidelines for modeling the structure under the debris loading taking into account the uncertainties. It was shown that determinist simulations of structural reliability under the impact are not enough. The impactors that can be considered “safe“ based on the deterministic simulation can affect structural integrity if their characteristics are slightly varying.
Uncertainty analysis of structural response under a random impact
Optim Eng
Troian, Renata (Autor:in)
Optimization and Engineering ; 24 ; 49-64
01.03.2023
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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