Finite element method for precisely simulating transmission line waving through ANSYS software

Abstract

The invention discloses a finite element method for precisely simulating transmission line waving through an ANSYS software. According to the finite element method, beam elements with a bending freedom degree under condensed local coordinates are adopted to simulate sub-wires of a transmission line assisted with the characteristic that stress mentoring guarantee cables only have tension; meanwhile, multiple connection modes of the sub-wires and spacers are considered, three-component aerodynamic parameters of all the sub-wires under a full-blast attack angle are precisely acquired through an icing split gas aerodynamic characteristics wind tunnel test, and then an APDL is compiled to directly load aerodynamic loads relevant to motion states; and last, precise waving simulation is realizedthrough nonlinear iteration solving. Through the finite element method, an icing multi-split transmission line waving phenomenon can be precisely reproduced, the application range is wide, and complicated anti-waving measures can be taken based on the simulation method.

Description

technical field [0001] The invention belongs to the field of galloping simulation of power transmission lines, in particular to a finite element method for accurately simulating galloping of power transmission lines by using ANSYS software. Background technique [0002] The wind-induced galloping of ice-coated conductors is a low-frequency (0.1-3Hz) large-amplitude (5-300 times the conductor diameter) self-excited vibration, also known as conductor galloping (Galloping). In recent years, due to the rapid development of power grid construction and frequent occurrence of extreme weather conditions, the frequency and intensity of galloping accidents on overhead transmission lines in my country have increased significantly. Especially after 2000, serious galloping accidents have occurred almost every year. Moreover, the range of wire galloping in the whole country is also expanding, and large-scale wire galloping has occurred in many areas where galloping accidents have never oc...

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Problems solved by technology

[0008] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a finite element method for accurately simulating the galloping of transmission lines using ANSYS software, which is used to solve the problem that the simulation methods in the prior art cannot be widely used, and on these simulation methods It is difficult to apply complex anti-dancing measures, and the simulated data is different from the actual state of the transmission circuit

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