检索范围:
排序: 展示方式:
Power fluctuation and power loss of wind turbines due to wind shear and tower shadow
Binrong WEN, Sha WEI, Kexiang WEI, Wenxian YANG, Zhike PENG, Fulei CHU
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 321-332 doi: 10.1007/s11465-017-0434-1
The magnitude and stability of power output are two key indices of wind turbines. This study investigates the effects of wind shear and tower shadow on power output in terms of power fluctuation and power loss to estimate the capacity and quality of the power generated by a wind turbine. First, wind speed models, particularly the wind shear model and the tower shadow model, are described in detail. The widely accepted tower shadow model is modified in view of the cone-shaped towers of modern large-scale wind turbines. Power fluctuation and power loss due to wind shear and tower shadow are analyzed by performing theoretical calculations and case analysis within the framework of a modified version of blade element momentum theory. Results indicate that power fluctuation is mainly caused by tower shadow, whereas power loss is primarily induced by wind shear. Under steady wind conditions, power loss can be divided into wind farm loss and rotor loss. Wind farm loss is constant at 3α(3α−1)R2/(8H2). By contrast, rotor loss is strongly influenced by the wind turbine control strategies and wind speed. That is, when the wind speed is measured in a region where a variable-speed controller works, the rotor loss stabilizes around zero, but when the wind speed is measured in a region where the blade pitch controller works, the rotor loss increases as the wind speed intensifies. The results of this study can serve as a reference for accurate power estimation and strategy development to mitigate the fluctuations in aerodynamic loads and power output due to wind shear and tower shadow.
关键词: wind turbine wind shear tower shadow power fluctuation power loss
Nonlinear dynamics of a wind turbine tower
A. GESUALDO, A. IANNUZZO, F. PENTA, M. MONACO
《机械工程前沿(英文)》 2019年 第14卷 第3期 页码 342-350 doi: 10.1007/s11465-019-0524-3
关键词: nonlinear dynamics plastic shear failure modal approximation time history
Review of the damage mechanism in wind turbine gearbox bearings under rolling contact fatigue
Yun-Shuai SU, Shu-Rong YU, Shu-Xin LI, Yan-Ni HE
《机械工程前沿(英文)》 2019年 第14卷 第4期 页码 434-441 doi: 10.1007/s11465-018-0474-1
关键词: rolling contact fatigue (RCF) white etching area (WEA) white etching crack (WEC) adiabatic shear band (ASB)
Modeling of shear walls using finite shear connector elements based on continuum plasticity
Ulf Arne GIRHAMMAR, Per Johan GUSTAFSSON, Bo KÄLLSNER
《结构与土木工程前沿(英文)》 2017年 第11卷 第2期 页码 143-157 doi: 10.1007/s11709-016-0377-3
关键词: shear walls wall diaphragms finite element modelling plastic shear connector analytical modelling experimental comparison
Dan V. BOMPA, Ahmed Y. ELGHAZOULI
《结构与土木工程前沿(英文)》 2020年 第14卷 第2期 页码 331-356 doi: 10.1007/s11709-019-0596-5
关键词: non-linear numerical modelling concrete damage plasticity RC flat slabs shear-heads punching shear
Behaviour of self-centring shear walls——A state of the art review
《结构与土木工程前沿(英文)》 2023年 第17卷 第1期 页码 53-77 doi: 10.1007/s11709-022-0850-0
关键词: self-centring shear walls rocking walls energy dissipation seismic performance factors PT loss residual drift
Prediction of the shear wave velocity
Amoroso SARA
《结构与土木工程前沿(英文)》 2014年 第8卷 第1期 页码 83-92 doi: 10.1007/s11709-013-0234-6
关键词: horizontal stress index shear wave velocity flat dilatometer test cone penetration test
On braced trapezoidal corrugated steel shear panels: An experimental and numerical study
《结构与土木工程前沿(英文)》 2023年 第17卷 第3期 页码 396-410 doi: 10.1007/s11709-023-0934-5
关键词: trapezoidal corrugated plate steel shear panel braced steel shear panel experimental study buckling resistance.
Experimental study on shear behavior of reinforced concrete beams with web horizontal reinforcement
Dong XU,Yu ZHAO,Chao LIU
《结构与土木工程前沿(英文)》 2014年 第8卷 第4期 页码 325-336 doi: 10.1007/s11709-014-0080-1
关键词: reinforced concrete beam shear strength web horizontal reinforcement experiments
Effect of loading rate on shear strength parameters of mechanically and biologically treated waste
《环境科学与工程前沿(英文)》 2022年 第16卷 第12期 doi: 10.1007/s11783-022-1595-7
● Mechanical behavior of MBT waste affected by loading rate was investigated.
关键词: Mechanically and biologically treated waste Landfill Triaxial test Loading rate Axial strain Shear strength parameter
Micromixing performance of the teethed high shear mixer under semi-batch operation
《化学科学与工程前沿(英文)》 2022年 第16卷 第4期 页码 546-559 doi: 10.1007/s11705-021-2069-3
关键词: high shear mixer semi-batch operation micromixing performance Villermaux/Dushman system segregation index
Predicting the capacity of perfobond rib shear connector using an ANN model and GSA method
Guorui SUN; Jun SHI; Yuang DENG
《结构与土木工程前沿(英文)》 2022年 第16卷 第10期 页码 1233-1248 doi: 10.1007/s11709-022-0878-1
关键词: perfobond rib shear connector shear strength ANN model global sensitivity analysis
Uncertainty of concrete strength in shear and flexural behavior of beams using lattice modeling
《结构与土木工程前沿(英文)》 2023年 第17卷 第2期 页码 306-325 doi: 10.1007/s11709-022-0890-5
关键词: lattice modeling shear failure flexural failure uncertainty deficiency numerical simulation
《结构与土木工程前沿(英文)》 2021年 第15卷 第3期 页码 576-594 doi: 10.1007/s11709-021-0728-6
关键词: fatigue shear hybrid stirrups hybrid reinforcement fiber-reinforced polymer
A simple method for evaluating liquefaction potential from shear wave velocity
Lianyang ZHANG,
《结构与土木工程前沿(英文)》 2010年 第4卷 第2期 页码 178-195 doi: 10.1007/s11709-010-0023-4
关键词: liquefaction earthquake simple method shear wave velocity case history introduction
标题 作者 时间 类型 操作
Power fluctuation and power loss of wind turbines due to wind shear and tower shadow
Binrong WEN, Sha WEI, Kexiang WEI, Wenxian YANG, Zhike PENG, Fulei CHU
期刊论文
Review of the damage mechanism in wind turbine gearbox bearings under rolling contact fatigue
Yun-Shuai SU, Shu-Rong YU, Shu-Xin LI, Yan-Ni HE
期刊论文
Modeling of shear walls using finite shear connector elements based on continuum plasticity
Ulf Arne GIRHAMMAR, Per Johan GUSTAFSSON, Bo KÄLLSNER
期刊论文
Nonlinear numerical simulation of punching shear behavior of reinforced concrete flat slabs with shear-heads
Dan V. BOMPA, Ahmed Y. ELGHAZOULI
期刊论文
Experimental study on shear behavior of reinforced concrete beams with web horizontal reinforcement
Dong XU,Yu ZHAO,Chao LIU
期刊论文
Effect of loading rate on shear strength parameters of mechanically and biologically treated waste
期刊论文
Predicting the capacity of perfobond rib shear connector using an ANN model and GSA method
Guorui SUN; Jun SHI; Yuang DENG
期刊论文
Uncertainty of concrete strength in shear and flexural behavior of beams using lattice modeling
期刊论文
Fatigue shear performance of concrete beams reinforced with hybrid (glass-fiber-reinforced polymer+ steel
期刊论文