Reduction of fatigue damage equivalent loads In the wind turbine system through the use bending twisting coupling induced in composite wind turbine blades

Şener, Özgün
Farsadi, Touraj
Gözcü, Ozan
Kayran, Altan


Reduction of Fatigue Damage Equivalent Loads in the Wind Turbine System Through the Use of Off Axis Plies in the Spar Caps of Composite Wind Turbine Blades
Gözcü, Ozan; Farsadi, Touraj; Şener, Özgün; Kayran, Altan (2015-07-19)
In the wind turbine industry, as the requirements for fatigue life and reliability increase, to achieve these goals appropriate measures must be taken such that loads incurred due to the flexing of the blades must be alleviated. In this study, the use of different off-axis ply angles in the main spar caps of wind turbine blades is investigated for its effectiveness in reducing fatigue damage equivalent loads in the whole wind turbine system. To achieve load alleviation in the wind turbine system, bendingtwi...
Reduction of switching overvoltages by means of controlled switching
Güneri, Melih; Özay, Nevzat; Department of Electrical and Electronics Engineering (2006)
This thesis analyses the controlled switching methods applied to modern SF6 type circuit breakers for the purpose of reducing switching overvoltages. Main emphasis is placed on controlled switching methods applied at extra high voltage level, since the cost of failures caused by switching overvoltages is highest in this voltage level. After a brief introduction about circuit breakers in general, switching overvoltages and controlled switching methods are analysed. Also a case study about controlled switchin...
Reduction of dynamic earth loads on flexible cantilever retaining walls by deformable geofoam panels
ERTUĞRUL, ÖZGÜR LÜTFİ; Trandafir, Aurelian C.; Özkan, M. Yener (2017-01-01)
The potential application of geofoam in reducing the dynamic earth forces on flexible cantilever earth retaining walls was investigated through small-scale physical model tests. Tests were carried out using a state-of-the-art laminar container and a uniaxial shaking table. Deformable geofoam panels of low stiffness made from expanded polystyrene (EPS) and extruded polystyrene (XPS) geofoam were utilized as compressible inclusions in the present study. The dynamic stress-strain properties of these geomateria...
NALCACI, AE (1994-04-14)
A new method for reduction of transient torques in a three phase induction motor, for starting from rest is described. In this method an initial DC current in the stator windings is necessary. The procedure to find the necessary amount of this current is explained. The method is also tested in a digital simulation and compared with one of the previously proposed methods
Reduction of scouring depth by using inclined piers
Bozkuş, Zafer (Canadian Science Publishing, 2010-12-01)
The aim of this experimental study is to examine the effect of inclination of dual bridge piers on scour depth under clear-water conditions for various uniform flow depths. Duration of 4 h was used in the experiments for each run. Scour depths were measured at four different points around the piers. The depths of local scour around inclined piers were found to be substantially smaller than the scour depths around vertical piers. Dimensional and nondimensional curves were developed and presented to show the ...
Citation Formats
Ö. Şener, T. Farsadi, O. Gözcü, and A. Kayran, “Reduction of fatigue damage equivalent loads In the wind turbine system through the use bending twisting coupling induced in composite wind turbine blades,” 2015, Accessed: 00, 2021. [Online]. Available: