|Table of Contents|

Influence of Transverse Finite Strains on Spatial Vortex Induced Vibration of Tension Leg Platform

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2009年06期
Page:
723-727
Research Field:
Publishing date:

Info

Title:
Influence of Transverse Finite Strains on Spatial Vortex Induced Vibration of Tension Leg Platform
Author(s):
YU Chun-hua1CHENG Xiao-jie2YIN Xiao-chun1
1.School of Sciences,NUST,Nanjing 210094,China;2.China Airborne Missile Academy,Luoyang 471009,China
Keywords:
fluid-solid coupling vibration offshore structures drilling platforms vortex shedding finite strain
PACS:
O353.4
DOI:
-
Abstract:
In order to research the dynamic response of the tension leg platform,the equations of motion and boundary conditions of the tension leg platform in three dimensions are derived from the Hamilton’s principle,the Kirchhoff’s hypothesis and the Lagrange functions.The motion equations and the boundary conditions are discretized in time and space by using the finite difference method.The differential equations are solved numerically by the Gear’s method.The semi-empirical Morison equation is applied to the fluid force simulation.The influence of the transverse finite strains on the spatial vortex induced vibration is compared under the interaction of variable current velocity water flow and vortex-shedding load.The calculation result shows: when the vortex-shedding load frequency approaches the natural frequency of the platform,the transverse finite strains influence the transverse displacement response obviously,and the deviation is more than 30%.The transverse finite strains influence the transverse and vertical displacement response greatly,and the deviation is more than 100%,even when the vortex-shedding load frequency is rather away from the natural frequency of the platform.

References:

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Last Update: 2012-11-19