The Analysis Of Aeolian Vibration And Damping For Transmission Lines

Transmission lines aeolian vibration is a general concern problem around the engineering,the damage of the conductor always happen for this.With the electricity transmission capacity grow rapidly,the popularized of long-distance and high-capacity transmission lines have become inevitable.While existing methods are immature,it is necessary to make further research in this field.In this paper,an efficient numerical simulation on the transmission line aeolian vibration response is researched,which included four part such as,experimental study on the power characteristics of vibration dampers,the brief introduction of fundamental theory about aeolian vibration,analysis model of conductor base on finite particle method is built,the numerical simulation on the transmission line aeolian vibration base on finite particle method.The specific contents are as follows:(1)Firstly,the power characteristics of vibration dampers which includes Stockbridge dampers,and a new damper,are determinated by excitation test method.This can provide a basis for designing the anti vibration of conductor.Compare the FR3 and FR4 dampers' test result with the result of numerical simulation,it can prove that the test is right.(2)The traditional numerical simulation on the transmission line aeolian vibration response,EBM and FVM is introducted,then the two method are used to calculation the transmission line aeolian vibration in the 1000 kV line of Wandian to Huainan and Shanghai,and also the defect of two method is pointed.Then combine with the power characteristics of vibration dampers and EBM,partly of the conductors' damper are advised.At last,Combine with the Miner linear damage theory,the simulation of fatigue life on the transmission line aeolian vibration base on fracture mechanics method.And the fatigue life of transmission line with/without damper are discussed,which can be reference on designing the anti vibration of conductor.(3)The basic principle of FPM is introducted,and the analysis model of conductor base on FPM is built.Base on the model,the form of the conductor is found and the vibration response of the conductor under uniform sinusoidal load is analysised,by compare with existing results can prove that the FPM can be used to analysis the vibration response of the conductor.Based on the FPM analysis model of conductor,the dummy damping ratio is derivated.Combine with the vortex-induced vibration proposed by Scanlan,the aeolian vibration response of line in chapter 2 is calculated,the result are also compare with FEM to prove that FPM can be used to calculate the aeolian vibration response of line.At last,the factors which influence the aeolian vibration response of line are discussed by FPM.The studies of aeolian vibration of conductor make sense not only in theoretical significance but also economic value.This paper gives an easy and method to calculate the aeolian vibration response of line,which can be basis for further study of the wind-induced vibration.