Numerical study of higher-harmonic wave loads and runup on monopiles with and without ice-breaking cones based on a phase-inversion method

Shi, Wei1; Zeng, Xinmeng1,2; Feng, Xingya3; Shao, Yanlin4; Li, Xin5

2023

10.1016/j.oceaneng.2022.113221

OCEAN ENGINEERING   影响因子和分区

0029-8018

1873-5258

Ice-breaking cones are commonly used in the design of marine structures in cold regions. This study investigates the effects of higher-harmonic wave loads and wave runup on a 5-MW offshore wind turbine with and without ice-breaking cones under extreme wave conditions on the Liaodong Peninsula in China. Two ice-breaking cones (upward-downward and inverted types) are considered. The numerical model adopts a two-phase flow by solving unsteady Reynolds-averaged Navier-Stokes (URANS) equations using the volume of fluid (VOF) method. A phase decomposition method through a 'Stokes-like' formulation was adopted to obtain the parameters for each har-monics. The presence of the conical part is seen to increase the second-harmonic wave loads by up to 40%, but it has only limited influence on the fourth and fifth harmonics. The upward-downward-type ice-breaking cone increases the third harmonic, while the inverted-type ice-breaking cone decreases the third harmonic. Due to the phase difference between the first-harmonic and higher harmonics, the largest wave runup occurs at 0 degrees, and 135 degrees is the location with the smallest wave runup. This is because at the 135-degree location, the linear component is positive but the other nonlinear components are negative. For the 0-degree location, all harmonics are positive. By contrast, the inverted type has little effect. The high harmonic wave runup of the minimum point is backwards compared with that of the monopile, and most nonlinear wave runups are different upstream of the monopile.

Offshore wind turbine Ice-breaking cone Wave loads Phase-inversion method High harmonics Wave runup

SCI ; EI

英语

ESI高被引

其他

[52071058] ; [51939002] ; [82233001]

Engineering ; Oceanography

Engineering, Marine ; Engineering, Civil ; Engineering, Ocean ; Oceanography

WOS:000894805200003

PERGAMON-ELSEVIER SCIENCE LTD

20225013239423

Harmonic analysis ; Location ; Navier Stokes equations ; Numerical methods ; Offshore oil well production ; Offshore structures ; Offshore wind turbines ; Two phase flow

Oil Field Production Operations:511.1 ; Wind Power (Before 1993, use code 611 ):615.8 ; Fluid Flow, General:631.1 ; Marine Drilling Rigs and Platforms:674.2 ; Calculus:921.2 ; Numerical Methods:921.6

ENGINEERING

Web of Science

1.Dalian Univ Technol, DeepWater Engn Res Ctr, State Key Lab Coastal & Offshore Engn, Dalian, Peoples R China
2.Ocean Univ China, Coll Engn, Qingdao, Peoples R China
3.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China
4.Tech Univ Denmark, Dept Mech Engn, Lyngby, Denmark
5.Dalian Univ Technol, Inst Earthquake Engn, Fac Infrastruct Engn, Dalian, Peoples R China

Shi, Wei,Zeng, Xinmeng,Feng, Xingya,et al. Numerical study of higher-harmonic wave loads and runup on monopiles with and without ice-breaking cones based on a phase-inversion method[J]. OCEAN ENGINEERING,2023,267.

Shi, Wei,Zeng, Xinmeng,Feng, Xingya,Shao, Yanlin,&Li, Xin.(2023).Numerical study of higher-harmonic wave loads and runup on monopiles with and without ice-breaking cones based on a phase-inversion method.OCEAN ENGINEERING,267.

Shi, Wei,et al."Numerical study of higher-harmonic wave loads and runup on monopiles with and without ice-breaking cones based on a phase-inversion method".OCEAN ENGINEERING 267(2023).