摘要
对深水中TLP及Spar在发生高频垂向谐振“Springing Vibration”时的水动力阻尼作了较为系统的研究与数值计算分析.计算结果表明：在本文所考虑的参数范围（KC=0.001～1.0,β=89236～435298）内,由于不同的形状阻尼特性,存在着两个不同的线性和非线性阻尼区域.基于数值计算结果分析,导出了适用于上述两个区域的粘性阻尼计算公式.
The non-linear viscous damping forces on a Tension Leg Platform （TLP） column experiencing ＂springing vibration＂ are calculated by directly solving the Navier-Stokes equations. Different characteristics of heave damping have been found in two different regimes in the ranges of Keulegan-Carpenter number KC from 0. 001 to 1.0 and frequency parameter β from 89236 to 435298. At very low KC , the heave damping force tends to be approximately linear with the velocity, whereas a definite nonlinear dependence on the velocity has been found as KC increases. From the present numerical estimation, it is concluded that a uniform scaling law cannot be applied, and the scaling laws for the heave damping estimation of a TLP column in two different regimes have been presented.
出处
《中国造船》
EI
CSCD
北大核心
2006年第2期17-23,共7页
Shipbuilding of China
