【摘要】 1 000 kV避雷器高度高,荷载大,结构重要性高,在地震中易损性极高。基于ANSYS有限元软件,建立了基于土与结构相互作用的1 000 kV避雷器有限元模型,输入地震波进行动力时程响应分析。结果表明,考虑土与结构相互作用后,避雷器顶端位移、瓷套应力和倾覆力矩并不是随着土体剪切波速的减小一直增大或减小,当土体较硬时对地震动起放大作用,相应结构动力响应变大,当土体较软时对地震动起隔震作用,结构动力响应变小。更多还原

【Abstract】 The 1000 kv arrester is a high and heavy load structure,which is of vital importance in the electric substation. It has high vulnerability during earthquakes. Finite element models of 1 000 kV arrester based on soil-structure interaction are established by ANSYS. Dynamic time-history analysis is carried out by inputting seismic waves with these models. The results show that the values of top displacement,bending stress and overturning moment in porcelain bushings of arrester don’t have a corresponding increase or decrease with the velocity of shear wave considering the soil-structure interaction. The oscillation of earthquake becomes stronger while the soil is hard,the corresponding structural dynamic response becomes larger. And the soil isolates the earthquake while it is soft,the structural dynamic response becomes smaller.更多还原