Dynamic characteristic analysis of a 3-D semi-submerged body as a fluid-structure interaction system

2004 ◽  
Vol 25 (3) ◽  
pp. 338-346 ◽  
Author(s):  
Xu Gang ◽  
Ren Wen-min
Keyword(s):  
Dynamic Characteristic ◽  
Fluid Structure Interaction ◽  
Characteristic Analysis ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Interaction System ◽  
Submerged Body

Modal Analysis on Fluid–Structure Interaction System of a Large-Scale Gas Control Valve

2011 ◽  
Vol 305 ◽  
pp. 15-18
Author(s):  
Fang Cao ◽  
Yong Wang
Keyword(s):  
Modal Analysis ◽  
Large Scale ◽  
Fluid Structure Interaction ◽  
Control Valve ◽  
Practical Significance ◽  
Characteristic Analysis ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Interaction System ◽  
Gas Control

According to the real structure and work condition of a large-scale gas control valve used in recycling generating electricity project, a modal analysis modeling of fluid-structure interaction system is set up and the vibration in fluid-structure interaction is studied. The fluid force on the valve plug when the control valve at different openings is analyzed. According to the modal computing of the plug in fluid environment, the vibration frequencies of the plug are obtained. The influence on vibration frequency of fluid-structure interaction is showed, which relate to vibration modal of plug. The change of plug frequency at coupling and uncoupling condition is investigated. All of these are in favor of vibration characteristic analysis, vibration fault diagnosis of control valve system and realizing design optimization in plug dynamic characteristics. These are of great practical significance for advancing study on large-scale control valves.

Analysis of a Nonlinear Friction Damping Mechanism in a Fluid-Structure Interaction System

1995 ◽  
Author(s):  
Oded Gottlieb ◽  
Michael Feldman ◽  
Solomon C. S. Yim
Keyword(s):  
Large Scale ◽  
Fluid Structure Interaction ◽  
Simulated Data ◽  
Identification Algorithm ◽  
Nonlinear Friction ◽  
Friction Damping ◽  
Restoring Force ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Interaction System

Abstract Analysis of a nonlinear friction damping mechanism in a fluid-structure interaction system is performed by combining a generalized averaging procedure with a recently developed identification algorithm based on the Hilbert transform. The system considered includes a nonlinear restoring force and a nonlinear dissipation force incorporating both viscous and structural damping. Frequency and damping response backbone curves obtained from simulated data are compared with analytical and approximate solutions and are found to be accurate. An example large scale experiment exhibiting viscous and Coulomb damping is also analyzed resulting in identification of system parameters.

Nonlinear Vibrations in a Parametrically Excited Fluid-Structure Interaction System With One-to-One Internal Resonance

2003 ◽  
Author(s):  
Takashi Ikeda
Keyword(s):  
Natural Frequency ◽  
Internal Resonance ◽  
Fluid Structure Interaction ◽  
Liquid Sloshing ◽  
Fluid Structure ◽  
Inertia Effects ◽  
Structure Interaction ◽  
Interaction System ◽  
Resonance Curves ◽  
One To One

Theoretical resonance curves prove that a structure’s resonance can facilitate liquid sloshing even when the internal resonance ratio is one-to-one. An investigation of nonlinear sloshing liquid vibrations in a rectangular tank supported by an elastic structure that is subjected to a vertical and sinusoidal excitation reveals that liquid sloshing occurs when the structure’s natural frequency is approximately equal to the natural frequency of sloshing, that is, in the state of one-to-one internal resonance, and that amplitude-modulated motions appear when the condition of the internal resonance deviates to some extent. A special consideration of the nonlinear inertia effects of liquid force and the use of Galerkin’s method help derive the differential (modal) equations governing the dynamic behaviors of the fluid-structure interaction system, while van der Pol’s method helps express the theoretical resonance curves. These theoretical results are in quantitative agreement with the experimental data.

scholarly journals Stochastic Reduced Order Modelling of a Fluid Structure Interaction System

2016 ◽  
Vol 144 ◽  
pp. 1213-1219 ◽  
Author(s):  
W. Dheelibun Remigius ◽  
Hridya P. Lal ◽  
Jainendra K. Dubey ◽  
Siddhesh M. Godbole ◽  
Sayan Gupta ◽  
...  
Keyword(s):  
Fluid Structure Interaction ◽  
Fluid Structure ◽  
Reduced Order ◽  
Structure Interaction ◽  
Reduced Order Modelling ◽  
Interaction System
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