Uncertainty quantification in numerical and experimental models of structural vibration problems

P. Langer, K. Sepahvand, S. Marburg

Research output: Contribution to conferencePaperpeer-review

Abstract

In this paper, the uncertainties in virtual prototyping using finite element method (FEM) is studied. For this investigation, simple monolithic structures are analyzed. An error analysis of simulation and experiment quantifies the assumptions made for building the models and provides operations that are often assumed to be exact. First, the influence of different measurement setups was investigated. For the finite element model, the study offers the level of modeling details necessary for achieving satisfactory results. Here, the impact of simplified boundary conditions in finite element models as well as the influence of distorted elements on the results are also discussed. Finally, an experimental modal analysis (EMA) was performed on the structures to validate the results from the finite element models, concerning parameter and model uncertainties. The results presents some limitations of virtual prototyping and of finite element modeling, which can be useful to find out some concepts for more accurent modeling.

Original languageEnglish
StatePublished - 2015
Externally publishedYes
Event44th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2015 - San Francisco, United States
Duration: 9 Aug 201512 Aug 2015

Conference

Conference44th International Congress and Exposition on Noise Control Engineering, INTER-NOISE 2015
Country/TerritoryUnited States
CitySan Francisco
Period9/08/1512/08/15

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