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Numerical model of fluid-structure interaction for water tower analysis of vibrations

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2020
384.pdf (976.4Kb)
Authors
Ćosić, Mladen
Folić, Radomir
Article (Published version)
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Abstract
This paper deals with the aspects of vibration analysis of 3D numerical water tower models with the explicitly generated 3D finite element (FE) solid fluid model that simulates the fluid-structure interaction (FSI). The development and implementation of the 3D FE solid fluid model in modelling and analysing the system response is extremely important, both in terms of determining the impulsive and convective hydrodynamic pressure, and in terms of overall sizing of the water tower. Vibration of the water tower is calculated based on the analysis of its eigenvibrations, analysis of eigenvibrations occurring when charging and discharging the water tower reservoir (SFA - Staged Fluid Analysis), Steady-State Analysis (SSA) in the frequency domain and the analysis of the system response in the time domain (THA - Time History Analysis), followed by the transformation of the frequency domain response using the Fast Fourier Transform (FFT). The analysis of eigenvalues using the Ritz vectors (Rit...z analysis) and the Power Spectral Density Analysis (PSDA) are carried out as the means of additional control and with the purpose of identifying vibration periods. The system's stiffness matrix and mass matrix are corrected using the 3D FE solid fluid model for analysing the water tower vibrations. Effects of the system's increasing vibration period are determined for the partially charged reinforced concrete (RC) water tower reservoir, given the strong action of the fluid mass that is excited for convective hydrodynamic action (sloshing) due to the water tower dimensions and the amount of fluid contained in the reservoir in this case.

Keywords:
water tower / vibration analysis / solid finite elements (FE) / fluid-structure interaction (FSI)
Source:
Structural Integrity and Life, 2020, 20, 2, 190-200
Publisher:
  • Institut za ispitivanje materijala, Beograd
Funding / projects:
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200012 (Istitute of Material Testing of Serbia - IMS, Belgrade) (RS-200012)

ISSN: 1451-3749

WoS: 000582636700015

Scopus: 2-s2.0-85095822619
[ Google Scholar ]
Handle
https://hdl.handle.net/21.15107/rcub_rims_387
URI
http://rims.institutims.rs/handle/123456789/387
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
Institut za ispitivanje materijala
TY  - JOUR
AU  - Ćosić, Mladen
AU  - Folić, Radomir
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/387
AB  - This paper deals with the aspects of vibration analysis of 3D numerical water tower models with the explicitly generated 3D finite element (FE) solid fluid model that simulates the fluid-structure interaction (FSI). The development and implementation of the 3D FE solid fluid model in modelling and analysing the system response is extremely important, both in terms of determining the impulsive and convective hydrodynamic pressure, and in terms of overall sizing of the water tower. Vibration of the water tower is calculated based on the analysis of its eigenvibrations, analysis of eigenvibrations occurring when charging and discharging the water tower reservoir (SFA - Staged Fluid Analysis), Steady-State Analysis (SSA) in the frequency domain and the analysis of the system response in the time domain (THA - Time History Analysis), followed by the transformation of the frequency domain response using the Fast Fourier Transform (FFT). The analysis of eigenvalues using the Ritz vectors (Ritz analysis) and the Power Spectral Density Analysis (PSDA) are carried out as the means of additional control and with the purpose of identifying vibration periods. The system's stiffness matrix and mass matrix are corrected using the 3D FE solid fluid model for analysing the water tower vibrations. Effects of the system's increasing vibration period are determined for the partially charged reinforced concrete (RC) water tower reservoir, given the strong action of the fluid mass that is excited for convective hydrodynamic action (sloshing) due to the water tower dimensions and the amount of fluid contained in the reservoir in this case.
PB  - Institut za ispitivanje materijala, Beograd
T2  - Structural Integrity and Life
T1  - Numerical model of fluid-structure interaction for water tower analysis of vibrations
EP  - 200
IS  - 2
SP  - 190
VL  - 20
UR  - https://hdl.handle.net/21.15107/rcub_rims_387
ER  - 
@article{
author = "Ćosić, Mladen and Folić, Radomir",
year = "2020",
abstract = "This paper deals with the aspects of vibration analysis of 3D numerical water tower models with the explicitly generated 3D finite element (FE) solid fluid model that simulates the fluid-structure interaction (FSI). The development and implementation of the 3D FE solid fluid model in modelling and analysing the system response is extremely important, both in terms of determining the impulsive and convective hydrodynamic pressure, and in terms of overall sizing of the water tower. Vibration of the water tower is calculated based on the analysis of its eigenvibrations, analysis of eigenvibrations occurring when charging and discharging the water tower reservoir (SFA - Staged Fluid Analysis), Steady-State Analysis (SSA) in the frequency domain and the analysis of the system response in the time domain (THA - Time History Analysis), followed by the transformation of the frequency domain response using the Fast Fourier Transform (FFT). The analysis of eigenvalues using the Ritz vectors (Ritz analysis) and the Power Spectral Density Analysis (PSDA) are carried out as the means of additional control and with the purpose of identifying vibration periods. The system's stiffness matrix and mass matrix are corrected using the 3D FE solid fluid model for analysing the water tower vibrations. Effects of the system's increasing vibration period are determined for the partially charged reinforced concrete (RC) water tower reservoir, given the strong action of the fluid mass that is excited for convective hydrodynamic action (sloshing) due to the water tower dimensions and the amount of fluid contained in the reservoir in this case.",
publisher = "Institut za ispitivanje materijala, Beograd",
journal = "Structural Integrity and Life",
title = "Numerical model of fluid-structure interaction for water tower analysis of vibrations",
pages = "200-190",
number = "2",
volume = "20",
url = "https://hdl.handle.net/21.15107/rcub_rims_387"
}
Ćosić, M.,& Folić, R.. (2020). Numerical model of fluid-structure interaction for water tower analysis of vibrations. in Structural Integrity and Life
Institut za ispitivanje materijala, Beograd., 20(2), 190-200.
https://hdl.handle.net/21.15107/rcub_rims_387
Ćosić M, Folić R. Numerical model of fluid-structure interaction for water tower analysis of vibrations. in Structural Integrity and Life. 2020;20(2):190-200.
https://hdl.handle.net/21.15107/rcub_rims_387 .
Ćosić, Mladen, Folić, Radomir, "Numerical model of fluid-structure interaction for water tower analysis of vibrations" in Structural Integrity and Life, 20, no. 2 (2020):190-200,
https://hdl.handle.net/21.15107/rcub_rims_387 .

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