10089_001.pdf - Load set calculation - ECN

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Load set calculation DOWEC 6MW H. Efdé 3.3 Forces, moments and deflections. Phatas notation Unit Description Table 1: Blade co-ordinate system Mxb[i], Myb[i] [kNm] Total moment of blade i around the blade foot in x and y-direction of the rotating blade co-ordinate system, non-pitching. Mxb[i]-p, Myb[i]-p [kNm] Total moment of blade i around the blade foot in x and y-direction of the rotating blade co-ordinate system, pitching. Tip disp. flap [i] [mm] Total displacement of tip of blade [i] in X-direction. Tip disp. lag [i] [mm] Total displacement of tip of blade [i] in Y-direction. Table 2: Hub co-ordinate system Fxn, Fyn, Fzn [kN] Total force at a predefined location behind the rotor centre in x, y and z-direction of the non rotating hub co-ordinate system. Mxn, Myn, Mzn [kNm] Total moment around the x, y and z-direction at a predefined location behind the rotor centre of the non rotating hub co-ordinate system. Fxn-r, Fyn-r, Fzn-r [kN] Total force at a predefined location behind the rotor centre in x, y and z-direction, rotating rotor co-ordinate system. Mxn-r, Myn-r, [kNm] Total moment around the x, y and z-direction at a predefined Mzn-r location behind the rotor centre , rotating rotor co-ordinate system. Torsional deformation rotor shaft [deg] Rotor angular acceleration [deg/s2] Axial force, rotor [kN] Axial aerodynamic force on the rotor Aero power, rotor [kW] Aerodynamic power on the rotor Pitch angle [i] [deg] Pitch angle of blade [i], angle blade tip with respect to the rotor plane (θ). R45.04/01.03/03 Stentec, 3-1-03 page 8
Load set calculation DOWEC 6MW H. Efdé Table 3: Tower co-ordinate system Phatas notation Unit Description Mxt, Myt, Mzt [kNm] Total moment around the (x,) y and z-direction of the tower coordinate system at the intersection between the horizontal axis at a specified height above the tower base and the tower Z-axis. X-defl, Y-defll [mm], Displacement in the X, Y direction, at a specified height above the [deg] tower base. Yaw angle [deg] Yaw angle with respect to tower top. Yaw rate [deg/s] Wind-speed, hub [m/s] Wind speed at hub height Wind direction [deg] Actual wind direction at hub with respect to the rotor shaft Gen. shaft power [kW] Power through the generator shaft. Rotorspeed [rpm] Speed of rotation of the rotor (positive is clockwise) (Ω). Azimuth angle [deg] Rotational angle of blade 1 with respect to the Z-axis 3.4 User defined parameters In Phatas it is possible to determine deflections, moments and stresses at specified locations in tower, nacelle and blades. Table 5: Tower parameters Phatas notation Unit Location above tower foot Description Mxt[1], Myt[1] [kNm] 0.0 m foundation base (sea floor) Mxt[2], Myt[2] [kNm] 110.2 m yaw bearing R45.04/01.03/03 Stentec, 3-1-03 page 9
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