Dynamic response of a horizontal plate dropping onto nonlinear freak waves using a fluid–structure interaction method

2017 ◽  
Vol 74 ◽  
pp. 291-305 ◽  
Author(s):  
Hao Qin ◽  
Wenyong Tang ◽  
Hongxiang Xue ◽  
Zhe Hu
Keyword(s):  
Dynamic Response ◽  
Fluid Structure Interaction ◽  
Horizontal Plate ◽  
Interaction Method ◽  
Freak Waves ◽  
Fluid Structure ◽  
Structure Interaction

scholarly journals Experimental and Numerical Study on Modal Dynamic Response of Water-Surrounded Slender Bridge Pier with Pile Foundation

2017 ◽  
Vol 2017 ◽  
pp. 1-20 ◽  
Author(s):  
Yulin Deng ◽  
Qingkang Guo ◽  
Lueqin Xu
Keyword(s):  
Dynamic Response ◽  
Water Level ◽  
Pile Foundation ◽  
Numerical Study ◽  
Fluid Structure Interaction ◽  
Bridge Pier ◽  
Experimental Program ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Tip Mass

This paper presents an experimental program performed to study the effect of fluid-structure interaction on the modal dynamic response of water-surrounded slender bridge pier with pile foundation. A reduced scale slender bridge pier specimen is built and tested through forced vibration method. The vibration periods of the first four lateral modes, including the first two modes along x-axis and the first two modes along y-axis, are measured based on the specimen submerged by 16 levels of water and designated with 4 levels of tip mass. Three-dimensional (3D) finite-element models are established for the tested water-pier system and analyzed under various combined cases of water level and tip mass. Percentage increases of vibration periods with respect to dry vibration periods (i.e., vibration periods of the specimen without water) are determined as a function of water level and tip mass to evaluate the effect of fluid-structure interaction. The numerical results are successfully validated against the recorded test data. Based on the validated models, the modal hydrodynamic pressures are calculated to characterize the 3D distribution of hydrodynamic loads on the pier systems. The research provides a better illumination into the effect of fluid-structure interaction on the modal dynamic response of deepwater bridges.

scholarly journals Fluid–structure interaction analysis of fluid pressure pulsation and structural vibration features in a vertical axial pump

2019 ◽  
Vol 11 (3) ◽  
pp. 168781401982858
Author(s):  
Liaojun Zhang ◽  
Shuo Wang ◽  
Guojiang Yin ◽  
Chaonian Guan
Keyword(s):  
Pressure Pulsation ◽  
Interaction Analysis ◽  
Equivalent Stress ◽  
Fluid Structure Interaction ◽  
Fluid Pressure ◽  
Structural Vibration ◽  
Interaction Method ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Axial Pump

Current studies on the operation of the axial pump mainly focus on hydraulic performances, while the coupled interaction between the fluid and structure attracts little attention. This study aims to provide numerical investigation into the vibration features in a vertical axial pump based on two-way iterative fluid–structure interaction method. Three-dimensional coupling model was established with high-quality structured grids of ADINA software. Turbulent flow features were studied under design condition, using shear–stress transport k-ω turbulence model and sliding mesh approach. Typical measure points along and perpendicular to flow direction in fluid domain were selected to analyze pressure pulsation features of the impeller and fixed guide vane. By contrast, vibration features of equivalent stress in corresponding structural positions were investigated and compared based on fluid–structure interaction method. In order to explore fluid–structure interaction vibration mechanism, distribution of main frequencies and amplitudes of the measure points was presented based on the Fast Fourier Transformation method. The results reveal the time and frequency law of fluid pressure pulsation and structural vibration at the same position in the vertical axial pump while additionally provide important theoretical guidance for optimization design and safe operation of the vertical axial pump.

Study of adaptive blades in extreme environment using fluid–structure interaction method

2019 ◽  
Vol 91 ◽  
pp. 102734 ◽  
Author(s):  
Weipao Miao ◽  
Chun Li ◽  
Yuanbo Wang ◽  
Bin Xiang ◽  
Qingsong Liu ◽  
...  
Keyword(s):  
Fluid Structure Interaction ◽  
Extreme Environment ◽  
Interaction Method ◽  
Fluid Structure ◽  
Structure Interaction
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