摘要
随着海上风电由浅海逐渐走向深海,导管架基础的应用随之增多。研究发现,当基础结构基频落到波高波周期联合分布的概率最大的区间时,仅对导管架基础进行静态分析是不够的,结果偏于危险。通过SACS软件建立结构有限元模型,研究波浪谱周期和波高对结构响应的影响,计算得到各个工况下结构波浪动力响应的放大系数。计算结果表明:动力放大系数在一定范围内存在极大值,波高越大,动力放大系数越大;当波谱周期较大时,动力放大系数接近于1。此外,对比动静力分析结果表明,在深水中的海上四桩导管架基础进行动力分析是必要的。
With the development of offshore wind turbines moving from shallow to deep waters,the application of jacket foundations are widely used.Previous studies indicate that only static analysis for the jacket foundation may result in relatively unsafe design if the base frequency of the jacket foundation falls into the maximum probability range of the joint distribution of wave height and wave period.The finite element models of the jacket foundation are established by the software SACS,in which the nonlinear pile-soil behavior was taken into consideration.In numerical simulations,the effects of the wave spectrum period and wave height on the structure response are investigated,such that the dynamic amplification factors of the structure response under wave dynamics are determined.The results show that the dynamic amplification coefficient has a maximum in a certain range,and the higher the wave height,the greater the dynamic amplification factor.When the spectral period is large,the dynamic amplification factor is close to 1.Moreover,the comparison between dynamic and static analyses indicates that it is necessary to carry out dynamic analysis for the four-pile jacket foundation in deep waters.
作者
左晶晶
罗成喜
曾启东
曾凡权
ZUO Jingjing;LUO Chengxi;ZENG Qidong;ZENG Fanquan(Power China Zhongnan Engineering Co.,Ltd.,Changsha 410014,China)
出处
《船舶工程》
CSCD
北大核心
2022年第2期18-22,34,共6页
Ship Engineering
关键词
四桩导管架
波浪响应
动力放大系数
谱疲劳
four-pile jacket foundation
wave response
dynamic amplification factor
spectral-based fatigue
作者简介
左晶晶(1990-),女,工程师。研究方向:海上风机基础设计。
