Frequency response analysis of perforated shells with uncertain materials and damage

Harri Hakula*, Mikael Laaksonen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
7 Downloads (Pure)

Abstract

In this paper, we give an overview of the issues one must consider when designing methods for vibration based health monitoring systems for perforated thin shells especially in relation to frequency response analysis. In particular, we allow either the material parameters or the structure or both to be random. The numerical experiments are computed using the standard high order finite element method with stochastic collocation for the cases with random material and Monte Carlo for those with damaged or random structures. The results display a wide range of responses over the experimental configurations. In perforated shell structures, the internal boundary layers can play an important role especially when damage is allowed within the penetration patterns. The computational methodology advocated here can be used to build statistical databases that are necessary for development of probabilistic damage identification methods.

Original languageEnglish
Article number5299
Pages (from-to)1-22
Number of pages22
JournalApplied Sciences (Switzerland)
Volume9
Issue number24
DOIs
Publication statusPublished - 1 Dec 2019
MoE publication typeA1 Journal article-refereed

Keywords

  • Eigenproblem
  • Frequency response
  • Hp-version
  • Perforated shells
  • Uncertainty quantification

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