ANSYS numerical simulation method of ice-covered conductor galloping based on beam element

Abstract

The invention discloses an iced conductor galloping ANSYS numerical simulation method based on a beam element, comprising the following steps: establishing a conductor static model; the static model of conductor being extended to the transmission line, and the static model of transmission line being obtained; establishing a split spacer bar model; solving the lifting force, damping force and torque of any conductor; loading the lifting force, damping force and torque wire model to obtain the wire force model; solving a transformation matrix to obtain the motion displacement value and the velocity value of all nodes of the local coordinate unit of the traverse; transforming the overall coordinate system of the traverse displacement into a local element coordinate system; the nodal forces attwo nodes of each local element of a single wire being solved, and the overall force of the wire being obtained by using the transformation matrix. The ice galloping model of conductor is obtained bytransforming the whole force of conductor into the whole coordinate system. Then the ice galloping model of transmission line is obtained. The utility model has the advantages that the anti-gallopingeffect of the split spacer rod is tested by changing the installation mode of the split spacer rod so as to improve the reliability of the transmission line.

Description

technical field [0001] The invention relates to the technical field of power transmission lines, in particular to an A2NSYS numerical simulation method for galloping ice-coated conductors based on beam elements. Background technique [0002] In order to prevent galloping from causing great harm to the normal operation of transmission lines, many scholars at home and abroad have carried out a lot of research work in this area. The currently existing representative dancing theories are: horizontal dancing mechanism, torsional dancing mechanism, eccentric ice-covered coupling dancing mechanism and dynamic instability dancing mechanism. [0003] However, there are still some defects in these dancing theories. Among them, the excitation mechanism of lateral vibration is obtained under the condition that only the degree of freedom in the vertical direction of the wire is considered. Considering too few directions and degrees of freedom, there is a large gap between galloping simu...

AI Technical Summary

Problems solved by technology

However, the cable element ignores the bending stiffness and torsional stiffness. Although the bending stiffness has little influence on the translational motion, the influence on the torsion cannot be ignored, and the greater the sag of the wire, the greater the impact of the bending stiffness.

[0006] To sum up, in the prior art, for the galloping simulation of transmission lines, people's requirements for the galloping simulation of the transmission line cannot be met.

Images