Next Article in Journal
Virtual Inertia-Based Inverters for Mitigating Frequency Instability in Grid-Connected Renewable Energy System: A Review
Next Article in Special Issue
Determination of Clamping Force Using Bolt Vibration Responses during the Tightening Process
Previous Article in Journal
Design Criteria for Planning the Agricultural Rainwater Harvesting Systems: A Review
Previous Article in Special Issue
Damage Detection Using Modal Rotational Mode Shapes Obtained with a Uniform Rate CSLDV Measurement
Open AccessArticle

Frequency Response Analysis of Perforated Shells with Uncertain Materials and Damage

1
Department of Mathematics and Systems Analysis, Aalto University, Otakaari 1, FI-00076 Aalto, Finland
2
Lappeenranta-Lahti University of Technology, School of Engineering Science, P.O. Box 20, FI-53851 Lappeenranta, Finland
*
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(24), 5299; https://doi.org/10.3390/app9245299
Received: 31 October 2019 / Revised: 25 November 2019 / Accepted: 30 November 2019 / Published: 5 December 2019
(This article belongs to the Special Issue Vibration-Based Structural Health Monitoring)
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. View Full-Text
Keywords: frequency response; eigenproblem; perforated shells; hp-version; uncertainty quantification frequency response; eigenproblem; perforated shells; hp-version; uncertainty quantification
Show Figures

Figure 1

MDPI and ACS Style

Hakula, H.; Laaksonen, M. Frequency Response Analysis of Perforated Shells with Uncertain Materials and Damage. Appl. Sci. 2019, 9, 5299.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop