WIND LOAD CALCULATION (assuming a solid section of 2.27m x 2.27m of the shaft and ) Code Used : IS 875 Basic Wind Speed Considered Vb = Design Wind Speed Vz = k1k2k3. Vb K1 = k2 = k3 =
0.7 1.2 1
Vz
42
=
Design Wind Pressure pz = = = Wind Load on Mast
50
m/s
Ultimate Case
0.6*Vz^2 1058.4 N/m2 0.108 T/m2 = =
2.27*1*pz 0.245
22 220 242
43.23 7
166.6 -28.8 0 -103.5
T/m length of the mast T/m length of the mast
Wind Load on Boom (wind perpendicular to the Boom length) = 1*3*pz = 0.324
T/m length of the mast T/m length of the mast
Wind Load on Boom (wind along the Boom length) = 2.27*3*pz = 0.735
T/m length of the mast T/m length of the mast
Wind Load on Rear Arm (wind perpendicular to the Boom length) = 2.04*1*pz = 0.220
T/m length of the mast T/m length of the mast
Total Wind Load (point load) acting at the top of the Mast (wind perpendicular to the Boom length) = 14.928 T/m length of the mast Total Moment at the top of the Mast (wind perpendicular to the Boom length) = 250.022 Tm
Dead Load (130m Ht.) Unit
Comments
8.33 6.4 6 11.5
T T T T
1 10
T T
@ 22m Radius max
66.10
T
1.5 T @ 2.95m
Moment of Inertia of one hollow square section Dimentions Thickness
10 mm Breadth 150 mm 130 mm 5600 mm2
External Internal Area
Depth
=
150 mm 130 mm 0.0056 m2
4 18386667 mm
Moment of Inertia Ixx
=
4 0.000018387 m
Moment of Innertial of Combined Section ( section formed by combining 4 such sections at a distance) C/C Distance of 2 Box Sections = 2100 Ixx(combined) = 4 ( Ixx(single)+Ah2) 4 2.477E+10 mm
Combination Load Case 101 Combination Load Case 102 Combination Load Case 103 Combination Load Case 104 Combination Load Case 105 Combination Load Case 106 Combination Load Case 107 Combination Load Case 108 Combination Load Case 109 Combination Load Case 110 Combination Load Case 111 Combination Load Case 112 Combination Load Case 113 Combination Load Case 114 Combination Load Case 115 Combination Load Case 116 Combination Load Case 117 Combination Load Case 118 Combination Load Case 119 Combination Load Case 120 Combination Load Case 121 Combination Load Case 122 Combination Load Case 123 Combination Load Case 124 Combination Load Case 125 Combination Load Case 126 Combination Load Case 127 Combination Load Case 128 Combination Load Case 129 Combination Load Case 130 Combination Load Case 131 Combination Load Case 132 Combination Load Case 133 Combination Load Case 134 Combination Load Case 135 Combination Load Case 136 Combination Load Case 137 Combination Load Case 138 Combination Load Case 139 Combination Load Case 140 Combination Load Case 141 Combination Load Case 142 Combination Load Case 143 Combination Load Case 144 Combination Load Case 145 Combination Load Case 146 Combination Load Case 147 Combination Load Case 148 Combination Load Case 149 Combination Load Case 150 Combination Load Case 151 Combination Load Case 152 Combination Load Case 153 Combination Load Case 154 Combination Load Case 155 Combination Load Case 156
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