波浪荷载作用下导管架海洋平台利用TLCD的振动控制

Suppression of random wave-induced vibrations in offshore platform by tuned liquid column damper

海洋平台是海洋能源开发的基础设施,除了安全性、稳定性要求之外,其舒适性也是倍受关注的问题之一。调液柱型阻尼器(tuned liquid column damper简称TLCD)通过液体在柱内的晃动从而消耗输入到平台结构的能量,以达到减小平台结构响应的目的。文中对安装有调(TLCD)的导管架海洋平台进行了振动控制分析。假设波浪荷载模型分别为高斯平稳白噪声过程和波浪谱模型,利用随机振动理论对不同的波浪荷载模型分别进行TLCD的参数优化,从而比较平台结构位移响应的减振率。为了更好地反映实际波浪特点,在采用波面谱的同时引入波浪的方向谱,比较计入波浪方向分布对结构响应控制的影响。

The effectiveness under optimal design of a Tuned Liquid Column Damper （TLCD） in suppressing wave-induced vibrations of offshore platform is studied in this paper. The problem is analyzed in the frequency domain with white noise excitation and wave spectrum excitation in this study. Optimum parameters of the TLCD for maximum reduction of peak structural responses to both models are calculated and compared. The numerical analysis results show that better control performance can be obtained when wave spectrum model is chosen. Directional wave spectrum which can describe the full nature of wind-induced wave is first addressed in the analysis so that the directional distribution can be considered.