Determining What Vortex-Induced Vibration Variables have the Maximum Effect on a Pipeline Free Span’s Amplitude of Displacement with Computational Fluid-Structure Interaction ASME V&V 2013-2315 Authors: • Marcus Gamino • Samuel Abankwa • Ricardo Silva • Edwin Johnson • Michael Fisher • Raresh Pascali • Egidio Marotta, • Carlos Silva • Alberto Rivas
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Determining What Vortex-Induced Vibration Variables have the Maximum Effect on a Pipeline
Free Span’s Amplitude of Displacement with Computational Fluid-Structure Interaction
ASME V&V 2013-2315
Authors: • Marcus Gamino • Samuel Abankwa • Ricardo Silva • Edwin Johnson • Michael Fisher
• Raresh Pascali • Egidio Marotta, • Carlos Silva • Alberto Rivas
• To determine the effects of different Reynolds number, Re, variables (i.e. flow velocities, change in pipe diameter, and fluid densities) on the maximum amplitude of displacement of a pipeline free span due to vortex-induced vibration (VIV).
Objective
ASME V&V 2013
Free Span • A free span is a section of
subsea pipeline that is not supported by the seabed.
• Fluid Velocity has the greatest effect on the amplitude of the free span’s displacement
• Change in density has the least effect
ASME V&V 2013
Do (in) v (m/s) ρ (kg/m3)
1 8 0.5 696.135
2 8 0.5 997.561
3 8 2 696.135
4 8 2 997.561
5 12 0.5 696.135
6 12 0.5 997.561
7 12 2 696.135
8 12 2 997.561
12 in
8 in
0.5 m/s
2 m/s
696.135 kg/m3
997.561 kg/m3
Full Factorial Design
ASME V&V 2013
Displacement Values Interactions
Do (in)
v (m/s)
ρ (kg/m3)
X (x10-2 in)
1 8 0.5 696.135 2.215
2 8 0.5 997.561 1.334
3 8 2 696.135 7.238
4 8 2 997.561 10.36
5 12 0.5 696.135 0.6279
6 12 0.5 997.561 0.8991
7 12 2 696.135 2.943
8 12 2 997.561 4.208
Full Factorial Design
ASME V&V 2013
Box-Behnken Design
Run Pattern
Pipe Diameter
(in.)
Fluid Velocity
(m/s)
Density (kg/m^3)
Displacement (in.)
1 --0 8 0.5 846.848 1.133x10-2
2 -+0 8 2 846.848 8.801x10-2
3 +-0 12 0.5 846.848 0.7626x10-2
4 ++0 12 2 846.848 3.573x10-2
5 0-- 10 0.5 696.135 0.7458x10-2
6 0-+ 10 0.5 997.561 1.066x10-2
7 0+- 10 2 696.135 4.855x10-2
8 0++ 10 2 997.561 6.951x10-2
9 -0- 8 1.25 696.135 3.412x10-2
10 +0- 12 1.25 696.135 1.699x10-2
11 -0+ 8 1.25 997.561 4.888x10-2
12 +0+ 12 1.25 997.561 2.429x10-2
13 000
(midpoint) 10 1.25 846.848 2.615x10-2
itl.nist.gov
ASME V&V 2013
Box-Behnken Design
ASME V&V 2013
Conclusions • Fluid Velocity has the greatest effect on free span
displacement when subjected to VIV
• Compared to velocity and pipe diameter, the change in density has very little affect on the displacement of the free span
• The Box-Behnkin Surface Response Design is the optimal design for this experiment, for it seems the response variations along the input ranges are nonlinear.
Conclusions
ASME V&V 2013
Future Work • Use FSI methodology and
other advanced computational analysis to verify assumptions made in design codes.
• Fatigue life analysis based on ASTM standards (e.g. ASTM E1049) may be performed in combination with the Palmgren-Miner rule to estimate the fatigue life.
ASME V&V 2013
References • Abaqus Version 6.7 Extended Functionality Documentations, 2007. • Blevins, R.D. Formulas for Natural Frequency and Mode Shape. New York: Van Nostrand
Reinhold, 1979. • Chica, L., Pascali, R., Jukes, P., Ozturk, B., Gamino, M., and Smith, K. Detailed FSI Analysis
Methodology for Subsea Piping Components. Proceedings of the ASME 31st International Conference on Offshore Mechanics and Artic Engineering. (2012): 1-11.
• DNV (2006), “Free Spanning Pipeline,” DNV-RP-F105. • Lienhard, John H. Synopsis of Lift, Drag, and Vortex Frequency Data for Rigid Circular
Cylinders. Pullman, WA: Technical Extension Service, Washington State University, 1966. • Palmer, Andrew Clennel, and Roger A. King. Subsea Pipeline Engineering. Tulsa, Okla: