摘要
采用流函数波浪理论分析了近海风电机组桩基础在不同水深情况下的水平向受力性能。将Morison方程与往复循环荷载下水平受荷桩p–y曲线法结合来分析风机桩基础的受力与变形。结合某海域波浪参数,基于流函数理论,采用无量纲化方法,对比分析了浅水、深水及过渡水深下的水流速度、加速度和波面分布,依据Morison方程得到波浪力沿深度的分布情况,依据往复循环荷载下水平受荷桩p–y曲线法求得桩基内力和变形的差异性。结果表明水深的变化会导致桩基内力和变形发生显著变化,建议近海风机基础设计中应根据水深准确选取波浪计算模型,便于初期设计时波浪力的合理估算。
Offshore wind turbines are mainly located in shallow water, and the nonlinear characteristics of the wave forces are quite significant. The stream function wave theory which can simulate arbitrary order nonlinear wave is of general applicability. The stress and deformation of pile foundation of wind turbines are analyzed on the basis of the function wave theory in combination with the Morison equation and the p–y curve under reversed cyclic load. According to an engineering practice, based on the stream function theory, using the non-dimensional method, the velocity, acceleration and wave surface distribution of three water depths are compared firstly, and then distribution differences of wave force and wave moment are calculated. Finally, the differences of inner force and deformation of piles are investigated. The results indicate that variations of wave parameters will result in significant changes of internal forces and deformation of the piles. Therefore, the foundation design of offshore wind turbines needs accurate wave parameters. A database for wave parameters which facilitates the estimation of wave force in the initial designs is suggested.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2013年第S2期1122-1125,共4页
Chinese Journal of Geotechnical Engineering
关键词
近海风机
桩基
流函数
水深
offshore wind turbine
pile foundation
stream function
water depth
