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Mechanics in Engineering ›› 2004, Vol. 26 ›› Issue (5): 0-0.doi: 10.6052/1000-0992-2003-253

• Mechanics in engigeering •    

RESEARCH ON DAMPING ISOLATION TO REDUCE VIBRATION AND

  

  • Received:2003-06-17 Revised:1900-01-01 Online:2004-10-10 Published:2004-10-10

Abstract: In this paper, a simple mathematical model of platform is established based on the principle of vibration reduction by using damping layers. The first vibration mode's damping ratio is obtained by a forced decoupling to two freedom degree mode. Also the relations between damping layer parameters and the structural damping ratio including the relative displacement control effect of structure and damping layers are studied. And the numerical simulation under wave force or earthquake force is carried out. The results show that using damping layers to reduce vibration is an effective measure. When the rigidity of damping layers is great, the structural vibration can be controlled effectively.

Key words: offshore jacket platform, damping isolation, vibration