Aeroelastic model of circular tube transmission tower with adjustable stiffness U-shaped spring

Abstract

The invention relates to an aeroelastic model, with rigid adjustable U-shaped spring leaves, of a circular pipe transmission tower. A tower model is included, the tower module comprises tower piles, horizontal and inclined support rods are arranged between the tower piles, the tower model is cut via multiple horizontal cross sections, each position where the tower pile is cut by the horizontal cross section is provided with a spring leaf connecting structure, each spring leaf connecting structure comprises joints which are respectively mounted in two ends of a fracture cut by the horizontal cross section of the tower pile, the U-shaped spring leaf whose installation position is adjustable is mounted between the joints, and two side surfaces of the U-shaped spring leaf are mounted in end surfaces, facing each other, of the two joints respectively; and opening directions of notches of the U-shaped spring leaves which are mounted in fracture positions of the tower piles cut by the same horizontal cross section are all directed to the geometric center of the tower model in the horizontal cross section. The aeroelastic model has the advantages that manufacture technology is simple, the cost is low, transport and assembly are convenient, requirements for rigidity and vibration mode of the model by a latticed variable cross section circular steel pipe transmission tower can be met, and accuracy of experiment data is improved.

Description

technical field [0001] The invention belongs to the technical field of aerodynamic models, in particular to an aeroelastic model of a circular tube transmission tower with adjustable U-shaped spring pieces. Background technique [0002] The aeroelastic model of the transmission tower is used in the aeroelastic wind tunnel test of the transmission tower line system. There are usually two methods for the stiffness simulation of the aeroelastic model: the concentrated stiffness method and the discrete stiffness method. The concentrated stiffness method requires the members of the model to be both similar in stiffness and geometrically similar. Since the transmission tower is a lattice tower with light weight and high rigidity, the cross-section of the "core beam" designed under the condition of similar rigidity is relatively large, which will have a great impact on the windshield area of ​​the entire tower. The ABS plastic plate usually used to make the "coat" satisfies the sa...

AI Technical Summary

Problems solved by technology

If the spring piece has been pasted before transportation, the weak link of the pasted part is easy to be damaged during transportation, and the large size of the model is not conducive to transportation

If it is pasted and assembled in the laboratory after transportation to form a solid whole, it will take up the experiment time

In addition, the thickness, length and width of the spring pieces at the truncation of each tower are the same. Such a design cannot meet the requirements for model stiffness and mode shape of the circular steel pipe transmission tower with variable cross-section lattice, so the experimental data obtained cannot be close to The actual situation

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