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61-62 Solar cell matrix material selection and PV array foundation engineering

Author: Source: Datetime: 2016-12-27 11:24:26

Figure 4-8  the coefficient with Wind force of the skeleton

(As shown in the figure for structural beams and column's structure of the cross-section, as the area of wind pressure role, take the part of visable vertical area relative
the structure board; structure refers to the various shapes of steel, sheet metal processing materials, steel composite materials such as composite and the gap of the empty structure or structure)

Figure-4-8--the-coefficient-with-Wind-force-of-the-skeleton

Table 4-5 Wind coefficient of the monomaterial

Sectional shape

Wind power factor

 

Sectional shape

Wind power factor

→O

Circular cross section

     1.20

     (0.075)

 

T-shaped section,side length ratio 1:2

1:2

 

 

           1.80

Quadrilateral cross section,front wind direction

     2.00

 

T-shaped section,side length ratio 1:2

 

2.00

Quadrilateralcross-section,with a 45°tilt

     1.50

T-shaped section,side length ratio 1:2

 

        1.50_

Quadrilateral cross-section,

R/d =0.2 or more

     1.20

H-shaped section,side length ratio 1:2

 

            2.20

O

Hexagonal,octagonal section

       1.40

├┤

H-shaped section,side length ratio 1:2

 

           1. 90

Triangular cross section

        1.30

Groove section,side length ratio 1:2

 

          2.10

Triangular cross section

         2.00

Groove section,side length ratio 1:2

          1.80

Triangular cross section

2.00

└┘

Groove section,side length ratio 1:2

          1.40

Equilateral right angle steel

          1.80

 

Cross section

           1.80

 

→└

Unequal-sided right angle steel1:2

 1.60

)

Semi-circular cross-section

            2.30

 

→┘

Unequal-sided right angle steel1:2

 1.70

(

Semi-circular cross-section

           1. 20

→┌

Unequal-sided right angle steel1:2

2.00

 

Strip elongated

           2-flO

→┘

Unequal-sided right angle steel1:2

 

1.90

28/5000 Approximate quadrilateral (three-dimensional flow)

1.20

Note:


1: The data in parentheses indicates the case where the wind speed (m/s) obtained by the following equation is exceeded.

V = 5.84/d (This "d" means the external dimension of the material,m).     


2: In the calculation of the windage coefficient of the same cross-section material in the component, if the wind direction is different, then take the average of wind direction coefficient in different directions,

For example: the case of equilateral right angle steel [(2.0+1.8)/2 = 1.9].

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