Study on Vortex-Induced Vibration of Deep-Water Marine Drilling Risers in Linearly Sheared Flows in consideration of Changing Added Mass

Table 4

Main physical and geometric parameters of the marine drilling riser.

Parameters	Values
Water depth (riser length),	2000
Outer diameter,	0.5334
Inner diameter,	0.4826
Elastic modulus,	2.1 × 10^11
Riser density, (kg/m^3)	7850
Internal fluid density, (kg/m^3)	1200
Seawater density, (kg/m^3)	1025
Mass ratio	2.35
Aspect ratio	3750
Top tension force coefficient,	1.2∼1.6
Surface seawater flow speed, (m/s)	0.5∼1.0
Bottom seawater flow speed, (m/s)	0.1
Platform heave amplitude, (m)	0∼2.0
Platform heave frequency, (rad/s)	0∼2.0