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Wind Calc API - RP - 2A

The document summarizes wind load calculations for a vessel according to API RP 2A and compares it to calculations based on UBC-1997 building codes. It provides design data like basic wind speed, air density, vessel dimensions, and shape coefficients to calculate the projected side area and end area. The maximum wind force of 1666.59 N (375 lb) is calculated based on these areas and coefficients. It concludes that since the calculated wind force is greater than the maximum required by codes, the UBC-1997 wind design is acceptable.

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Adi Cahyoko
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1K views1 page

Wind Calc API - RP - 2A

The document summarizes wind load calculations for a vessel according to API RP 2A and compares it to calculations based on UBC-1997 building codes. It provides design data like basic wind speed, air density, vessel dimensions, and shape coefficients to calculate the projected side area and end area. The maximum wind force of 1666.59 N (375 lb) is calculated based on these areas and coefficients. It concludes that since the calculated wind force is greater than the maximum required by codes, the UBC-1997 wind design is acceptable.

Uploaded by

Adi Cahyoko
Copyright
© Attribution Non-Commercial (BY-NC)
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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WIND LOADS IN ACCORDANCE WITH API RP 2A WIND LOAD BASED ON UBC-1997 ARE UTILIZED AND COMPARED WITH API RP 2A

1. DESIGN DATA BASIC WIND SPEED WEIGHT DENSITY OF AIR SHAPE COEFFICIENT WIND LOAD FROM PVELITE REPORT (BASED ON UBC-1997) 2. WIND FORCE SHELL OUTSIDE DIAMETER LENGTH OF VESSEL INSULATION THICKNESS LENGTH INCLUDING INSULATION As = PROJECTED SIDE AREA WIND FORCE (SIDE) = (r/2)*u 2*Cs*As Do = = = = = = = = Vmax = Vmax = 2540 7460 0 7460 18.9484 mm mm mm mm m^2 8.3 24.5 0.0 24.5 204.0 ft ft ft ft ft^2 u = r = Cs = Vw = 61.128 km/h 0.5 13008.06 N 2924.3 lb 38.205 mph 3 0.0023668 slugs/ft

1666.59 N 5.067 m^2 445.67 N

375 lb 54.5 ft^2 100 lb

Ae = PROJECTED END AREA WIND FORCE (END) = (r/2)*u 2*Cs*Ae MAXIMUM WIND FORCE

MAX(WIND FORCE SIDE,WIND FORCE END) 1666.59 N 375 lb

CONCLUSION:

SINCE Vw > Vmax THAN THE WIND DESIGN BASED ON UBC-1997 ARE ACCEPTABLE.

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