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An improvement of the smeared theory for stiffened plates

An improvement of the smeared theory for stiffened plates
An improvement of the smeared theory for stiffened plates
This paper presents a new development of the simplifying smearing technique for modelling vibration of cross-stiffened, rectangular plates. This computational-efficient smearing technique has been known for many years, but so far the accuracy of predicted natural frequencies has been inadequate. The reason is that calculations of the equivalent area moment of inertia and corresponding bending stiffness of the plate and stiffeners in one direction have neglected the influence of stiffeners arranged perpendicular to that direction. In order to improve the prediction, these perpendicular stiffeners are taken into account in this paper, and this improved smearing technique results in a better accuracy for the natural frequencies of flat stiffened plates. Moreover, the theory is extended to include curved stiffened plates. The higher prediction accuracy is demonstrated by comparing results from a numerical model based on this new development, with results from finite element simulations that include the exact cross-sectional geometries. These findings are verified by experiments with both a flat and a double-curved, cross-stiffened panel fabricated from solid blocks of material.
9780854329007
1-12
University of Southampton
Luan, Spark Yu
bc512fda-5c70-451f-b326-5b3429765def
Olrich, Mogens
d7ad0e2e-686f-4684-b6eb-eba712216052
Mace, Brian R.
Ferguson, Neil S.
Rustighi, Emiliano
Institute of Sound and Vibration Research (University of Southampton)
Luan, Spark Yu
bc512fda-5c70-451f-b326-5b3429765def
Olrich, Mogens
d7ad0e2e-686f-4684-b6eb-eba712216052
Mace, Brian R.
Ferguson, Neil S.
Rustighi, Emiliano

Luan, Spark Yu and Olrich, Mogens (2009) An improvement of the smeared theory for stiffened plates. Mace, Brian R., Ferguson, Neil S. and Rustighi, Emiliano (eds.) In Proceedings of NOVEM 2009 Noise and Vibration: Emerging Methods. University of Southampton. pp. 1-12 .

Record type: Conference or Workshop Item (Paper)

Abstract

This paper presents a new development of the simplifying smearing technique for modelling vibration of cross-stiffened, rectangular plates. This computational-efficient smearing technique has been known for many years, but so far the accuracy of predicted natural frequencies has been inadequate. The reason is that calculations of the equivalent area moment of inertia and corresponding bending stiffness of the plate and stiffeners in one direction have neglected the influence of stiffeners arranged perpendicular to that direction. In order to improve the prediction, these perpendicular stiffeners are taken into account in this paper, and this improved smearing technique results in a better accuracy for the natural frequencies of flat stiffened plates. Moreover, the theory is extended to include curved stiffened plates. The higher prediction accuracy is demonstrated by comparing results from a numerical model based on this new development, with results from finite element simulations that include the exact cross-sectional geometries. These findings are verified by experiments with both a flat and a double-curved, cross-stiffened panel fabricated from solid blocks of material.

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Published date: April 2009
Venue - Dates: NOVEM 2009 Noise and vibration: Emerging methods, United Kingdom, 2009-04-05 - 2009-04-08
Organisations: Dynamics Group

Identifiers

Local EPrints ID: 355224
URI: https://eprints.soton.ac.uk/id/eprint/355224
ISBN: 9780854329007
PURE UUID: dad38897-f48a-4fdd-83b4-85fb9e26d98f

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Date deposited: 21 Aug 2013 11:17
Last modified: 18 Jul 2017 03:49

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Contributors

Author: Spark Yu Luan
Author: Mogens Olrich
Editor: Brian R. Mace
Editor: Neil S. Ferguson
Editor: Emiliano Rustighi

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