Detail publikace
The inverse vibration problem for fixed beam submerged in fluid
HAVLÁSEK, M. HABÁN, V. HUDEC, M. POCHYLÝ, F.
Anglický název
The inverse vibration problem for fixed beam submerged in fluid
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
en
Originální abstrakt
Description of dynamic behaviour of the structures is based on the mass, damping and stiffness matrices. Unfortunately, this description is inapplicable in case of the fluidstructure interaction (FSI), because the matrices of system, which consists of the structure and ambient fluid, are generally not known. The matrices of system, describing the FSI, can be determined by solution of inverse vibration problem, which is an approach employing the spectral matrix and modal matrices of analysed system. The eigenvalues for creation of the spectral matrix are determined based on experimental measurement. The results of experiment can be verified by numerical simulation. The modal matrices of structure submerged in fluid can be given by experiment, which is not simple in FSI problem, or by acoustic modal analysis. Third approach for determination of the modal matrices works with the assumption, that the eigenvectors of structure are not influenced by the fluid and are identical to the eigenvectors of structure without the ambient fluid. This assumption is generally correct for majority of FSI problems. Described method is demonstrated on determination of the matrices of dynamic systems of the fixed beam submerged in water.
Anglický abstrakt
Description of dynamic behaviour of the structures is based on the mass, damping and stiffness matrices. Unfortunately, this description is inapplicable in case of the fluidstructure interaction (FSI), because the matrices of system, which consists of the structure and ambient fluid, are generally not known. The matrices of system, describing the FSI, can be determined by solution of inverse vibration problem, which is an approach employing the spectral matrix and modal matrices of analysed system. The eigenvalues for creation of the spectral matrix are determined based on experimental measurement. The results of experiment can be verified by numerical simulation. The modal matrices of structure submerged in fluid can be given by experiment, which is not simple in FSI problem, or by acoustic modal analysis. Third approach for determination of the modal matrices works with the assumption, that the eigenvectors of structure are not influenced by the fluid and are identical to the eigenvectors of structure without the ambient fluid. This assumption is generally correct for majority of FSI problems. Described method is demonstrated on determination of the matrices of dynamic systems of the fixed beam submerged in water.
Klíčová slova anglicky
vibration, fixed beam, fluid
Vydáno
20.12.2019
ISSN
1755-1315
Kniha
IOP Conference Series: Earth and Environmental Science
Ročník
405
Číslo
2019
Strany od–do
1–6
Počet stran
6
BIBTEX
@inproceedings{BUT161146,
author="Michal {Havlásek} and Edita {Mariánková} and Vladimír {Habán} and Martin {Hudec} and František {Pochylý},
title="The inverse vibration problem for fixed beam submerged in fluid",
booktitle="IOP Conference Series: Earth and Environmental Science",
year="2019",
volume="405",
number="2019",
month="December",
pages="1--6",
issn="1755-1315"
}