Solar panel street light pole In the solar street light system, a structurally important issue is wind resistance design. The wind resistance design is mainly divided into two parts, one is the wind resistance design of the battery module bracket, and the other is the wind resistance design of the solar panel street light pole.
According to the technical parameter data of the battery module manufacturers, the upwind pressure that the solar battery module can withstand is 2700Pa. If the wind resistance coefficient is selected to be 27m / s (equivalent to a class 10 typhoon), according to non-viscous fluid mechanics, the wind pressure to which the battery module is subjected is only 365Pa. Therefore, the module itself can fully withstand a wind speed of 27m / s without being damaged. Therefore, the key consideration in the design is the connection between the battery module bracket and the solar panel street light pole.
In the design of the street light system, the connection design of the battery component bracket and the solar panel street light pole is fixedly connected with a bolt pole.
Wind resistant design of solar panel street light pole
The parameters of the street light are as follows:
Panel angle A = 16o Solar Panel Street Light pole height = 5m
Solar street light manufacturers design to choose the width of the weld at the bottom of the solar light pole prices δ = 4mm The outer diameter of the bottom of the solar light pole prices = 168mm.The surface where the weld is located is the damage surface of the solar light pole prices. The distance from the calculated point P of the resistance moment W of the solar light pole prices failure surface to the line of action of the panel load F of the solar light pole prices is PQ = [5000+ (168 + 6) / tan16o] × Sin16o = 1545mm = 1.545m. Therefore, the moment of action of the wind load on the failure surface of the solar light pole prices is M = F × 1.545.
According to the design maximum allowable wind speed of 27m / s, the basic load of the 2 × 30W dual-lamp integrated solar light battery panel is 730N. Considering the safety factor of 1.3, F = 1.3 × 730 = 949N.
Therefore, M = F × 1.545 = 949 × 1.545 = 1466N.m.
According to mathematical derivation, the moment of resistance of the toroidal failure surface W = π × (3r2δ + 3rδ2 + δ3).
In the above formula, r is the inner diameter of the ring, and δ is the ring width.
Breaking surface resistance moment W = π × (3r2δ + 3rδ2 + δ3)
= π × (3 × 842 × 4 + 3 × 84 × 42 + 43) = 88768mm3
= 88.768 × 10-6 m3
Stress due to moment of wind load on the failure surface = M / W
= 1466 / (88.768 × 10-6) = 16.5 × 106pa = 16.5 Mpa << 215Mpa
Among them, 215 Mpa is the bending strength of Q235 steel.
Therefore, the welding seam width designed and selected by the solar street light manufacturer meets the requirements. As long as the welding quality can be guaranteed, the wind resistance of the lamp pole is not a problem.
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