scholarly journals Flow induced vidration of long span gates. (2nd report. Added mass and fluid damping).

1988 ◽  
Vol 54 (504) ◽  
pp. 1977-1984
Author(s):  
Noriaki ISHII ◽  
Eduard NAUDASCHER ◽  
Kensaku IMAICHI ◽  
Tsunehisa SANAGI
Keyword(s):  
Added Mass ◽  
Long Span ◽  
Fluid Damping

scholarly journals Flow induced vibration of long span gates. (3rd Report, Verification of added mass and fluid damping).

1988 ◽  
Vol 54 (507) ◽  
pp. 3151-3156
Author(s):  
Noriaki ISHII ◽  
Kensaku IMAICHI ◽  
Eduard NAUDASCHER ◽  
Daisuke HORII ◽  
Takeya SHIBATA
Keyword(s):  
Added Mass ◽  
Flow Induced Vibration ◽  
Long Span ◽  
Fluid Damping

Added Mass and Damping for Cylinder Vibrations Within a Confined Fluid Using Deforming Finite Elements

1987 ◽  
Vol 109 (3) ◽  
pp. 283-288 ◽  
Author(s):  
R. Chilukuri
Keyword(s):  
Finite Elements ◽  
Vibration Amplitude ◽  
Stokes Equations ◽  
Outer Cylinder ◽  
Added Mass ◽  
Navier Stokes ◽  
Element Analysis ◽  
Damping Coefficients ◽  
Moving Cylinder ◽  
Fluid Damping

Added mass and fluid damping coefficients for vibrations of an inner cylinder that is enclosed by a concentric outer cylinder are determined by finite element analysis of the unsteady, laminar, incompressible flow in the annulus. Continuously deforming space-time finite elements are used to track the moving cylinder and the changing shape of the space domain. For small cylinder vibration amplitudes, the present results agree well with the work of earlier investigators who solved the linearized Navier-Stokes equations on a fixed mesh. Fluid damping coefficients are shown to increase with vibration amplitude. Added mass coefficients may either increase or decrease with increasing vibration amplitude.

S161011 Fluid Damping and Added Mass of Sheets Vibrating in Air

2013 ◽  
Vol 2013 (0) ◽  
pp. _S161011-1-_S161011-5
Author(s):  
Hikaru FUKUMORI ◽  
Masahiro WATANABE ◽  
Kensuke HARA
Keyword(s):  
Added Mass ◽  
Fluid Damping

Streamwise Gate Vibration

2017 ◽  
pp. 204-229
Keyword(s):  
Wave Theory ◽  
Mass Effect ◽  
Added Mass ◽  
Wave Radiation ◽  
Theory Analysis ◽  
Single Degree Of Freedom ◽  
Single Degree ◽  
Long Span ◽  
Mass Spring

Streamwise vibrations of gates due to the bending flexibility of the skinplate of Tainter gates or the weir plate of long-span gates result in pushing-and-drawing of the water in the reservoir. During each cycle of vibration, the gate's motion must accelerate and then decelerate the water mass in contact with the vibrating gate surface, resulting in a substantial added mass effect. From simple single degree-of-freedom mass-spring-damper vibration theory, one understands that the effect of added mass is to lower the frequency of gate vibration. In addition to the push-and-draw effect, streamwise motion can also result in discharge fluctuation for inclined gates, providing a source of gate excitation. Rayleigh's wave theory analysis from the previous chapter is applied to provide an analysis framework for determining the magnitude of wave radiation damping and to calculate the added mass.

S1650101 Fluid Damping and Added Mass of Sheets Vibrating near Walls

2014 ◽  
Vol 2014 (0) ◽  
pp. _S1650101--_S1650101-
Author(s):  
Hikaru FUKUMORI ◽  
Masahiro WATANABE ◽  
Ryousuke MORITA
Keyword(s):  
Added Mass ◽  
Fluid Damping
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