Vortex-Induced Vibration Response Bifurcation Analysis of Top-Tensioned Riser Based on the Model of Variable Lift Coefficient

Table 1

Parameters of TTR.

parameter	symbol	values
Elastic modulus		210Gpa
Seawater density		1025kg/m^3
Material density		7850kg/m^3
Internal fluid density		800kg/m^3
Outside diameter		0.325m
Inside diameter		0.305m
Riser length		1500m
Top tension coefficient		1.3
Additional mass coefficient		1.0
Strouhal number		0.2