【摘要】 本文根据多条输电线路工程中不同类型、不同高度输电塔为原型 ,建立空间有限元模型 ,利用模态分析研究输电塔结构的动力特性 ,计算出结构第 1自振周期及其振型 ,以实测所得的周期估算公式为基础 ,经过修正得出较为精确的输电塔结构第 1自振周期近似计算方法和细化后的结构第 1振型系数 ,可用于输电塔设计中风振系数计算 ,最后用实际算例验证了本文研究成果对工程设计有参考意义。更多还原

【Abstract】 In this paper,many dimensional models were established according to several kinds of transmission towers which vary in height.Then through the modal analysis,the natural frequency,vibration modes of the models can be achieved.Based on the above,the result will lead to an pricise formula to estimate the natural frequencies of transmission towers,and the approximate method of obtaining vibration modes of the structures can also be found.Thus,these conclusions will have more reference significance to practical engineering design of transmission system.更多还原