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The transmission tower is a project the number of large and 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. Transmission line system in use, the more exposed to dynamic loads of natural wind, ambient vibration and earthquake . Exhibit strong nonlinear characteristics due to the presence of the wire , lightning conductor flexible material , the transmission line system , accurate analysis with considerable difficulty . Therefore, the analysis of such complex power transmission line system coupled system only stay in qualitative analysis phase , not yet comprehensive and accurate analysis of the dynamic characteristics of the transmission line system . Therefore , to ensure that the transmission line system to work properly in the strong earthquake loads , power engineering and civil engineering sector has become an important research topic , and attracted much attention of the researchers at home and abroad . In this paper, the background of the 5A-ZM2 type 500kV transmission line system , to study the dynamic characteristics and its dynamic response under strong earthquakes , based on analysis and comparison of the model of a single tower , single the tower -wire model and the twin towers three lines seismic response of the model . The main work includes : the ANSYS platform using the software to establish the finite element model of the transmission line system space , and three models dynamic characteristics . 2 , comparing the earthquake response of a single tower with single the tower -wire system , the results showed that the wire on the seismic response of transmission towers . 3 , we compare the seismic response of single - tower -wire system and the twin towers of the three-wire system , the results show that the seismic response of very different . 4 , we compare the vibration input under the twin towers three - line system to the two-dimensional ( X , Y to ) and three-dimensional ground reaction , the results show that the vertical seismic load structure vertical reaction .
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