Mitigation of Flow-Induced Vibration of Steel Catenary Risers with Pounding Tuned Mass Damper

Table 4

: Vibration control performance of the PTMD with different mass ratios under OC 4.

Mass ratio (%)	Displacement		Acceleration
	Response (m)	Reduction ratio (%)	Response (m/s^2)	Reduction ratio (%)
1	8.08	5.3	13.15	2.0
2	6.46	24.3	11.96	10.9
3	4.90	42.6	9.60	28.5
4	3.80	53.5	7.63	43.1
5	3.11	63.5	6.37	52.0