Base cross-sectional area of the skirt cylinder or cone shell of the tower equipment
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On page 24 of standard NB/T47041, in section 7.1 Symbols, why is the diameter in the formula for Asb not calculated as Asb=π(Dsi+δes)δes? Is there some particular reason for this, or is it a mistake?
The formula for calculating the cross-sectional area of the skirt cylinder’s barrel section is given in the standards; according to those standards, it is the inner diameter multiplied by the effective thickness. I think it should be the mean diameter multiplied by the thickness instead
I think that since it’s clearly the cross-sectional area, we should use the actual value; is it necessary to be overly conservative? Design calculations inherently include a safety factor.
The extent of the difference depends on the diameter of the tower and the thickness of the skirt cylinder. The issue is that it may pass when calculated based on the actual cross-sectional area, but may not pass if calculated using the cross-sectional area from this formula; in that case the cylinder has to be made thicker, which isn’t a waste?