摘要
以2座不同呼高的干字型大跨越输电塔为例,探讨了此类结构在地震激励下的弹性动力稳定性能。文中借助有限元程序ANSYS的APDL语言,编制了将时程分析法与特征值屈曲分析法相结合的输电塔结构在地震作用下的弹性动力稳定分析程序,并讨论了不同地震输入方向和阻尼比对输电塔弹性动力稳定的影响。计算得出了2座输电塔在地震作用下弹性动力稳定分析的临界荷载及最不利输入方向,并比较了其动力稳定性能的特点。
Using 2 large span ＂干＂shaped transmission towers with different nominal height as an example, the elastic dynamic stability of this type of structure under earthquakes is studied. In virtue of ANSYS＇ APDLlanguage, an elastic dynamic stability analysis code, which combines time-history analysis and eigenvalue buckling analysis, is developed to analyze tower stability under earthquake. The effects of different earthquake input directions and damping ratios on tower stability are discussed. Critical loads and worst input directions of these 2 towers under earthquakes are calculated. Dynamic stabilities of the 2 towers are also compared.
出处
《电力建设》
2008年第11期6-11,共6页
Electric Power Construction
基金
国家电网公司科技项目(SGKJ[2007]413)
关键词
输电塔
地震
弹性
动力稳定
transmission tower
earthquake
elasticity
dynamic stability
