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Wind-Induced Response of Long Span Transmission Line System

Author: LiuWanQun
Tutor: DengHongZhou；FangXiangRi
School: Tongji University
Course: Structural Engineering
Keywords: Big leap transmission line system Dynamic characteristics Wind-induced response Wind load factor
CLC: TU347
Type: Master's thesis
Year: 2006
Downloads: 623
Quote: 12
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Abstract


The transmission tower is an engineering huge number , but very important towering structure . As the the important lifeline engineering of power facilities , the destruction of the transmission line system will lead to paralysis of the power supply system , which not only seriously affect the people's production and construction , the order of life , and may lead to fires and other secondary disasters , to society and people's lives and property resulting in serious consequences. In this paper, Yamen large span transmission line system engineering background , transmission tower height of 215.5m, across the middle distance of 1425m . Through its dynamic characteristics and wind vibration response to the study , some conclusions with reference meaning wind resistant design of practical engineering . Its main tasks are : Long Span Transmission Line System , a nonlinear finite element model of a precise cable - rod space , taken into account in the calculation of the coupling between the tower - line , the elevator shaft of the transmission tower power characteristics impact so that the whole model more in line with the actual situation . As the initial state of the entire system , modal analysis and wind induced response time history analysis and nonlinear static analysis of the results of the initial internal force of its own weight and power lines under . Frequencies and mode shapes dynamic characteristics of large span transmission line system by modal analysis results , and through a single wire with a single tower , elevator shaft tower line system to various circumstances compared the transmission system tower , wires , the elevator shaft between the three mutual influence. And time history analysis method to calculate the response and its spectral characteristics of wind-induced vibration of the entire large span transmission line system under simulated wind loads . Time history analysis and the results of different height and position of the tower wind vibration coefficient values ??, and compare the existing variety of specifications , recommendations coefficient values ??are given in the final design of long span transmission tower .

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CLC: > Industrial Technology > Building Science > Building structure > Entity structure > Tower mast structure
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