基于随机振动理论酒杯型输电塔风振系数研究  

Wind vibration coefficient of cup type transmission tower based on random vibration theory

作　　者：吴秀峰[1] 李红芳[1] 赵可[1] 

机构地区：[1]辽宁工程技术大学建筑工程学院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2016年第2期182-186,共5页Journal of Liaoning Technical University (Natural Science)

摘　　要：针对输电塔架中应用范围最为广泛的酒杯型塔架,不同规范给出不同的风振系数计算方法.本文基于随机振动理论采用Davenport谱模拟脉动风,在ANSYS环境中对塔架有限元模型进行风振时程分析,从而得到模拟风振系数结果;并将模拟结果与规范运算结果进行对比分析,得到不同高度的输电塔架的风振系数变化规律.结果表明,在塔身部分三种规范及模拟结果都十分接近;对其曲臂及横担处,规范公式凸显不足,应该考虑刚度突变引起的此处风振系数变化.For calculation method about wind vibration coefficient of cup type transmission tower widely used, this paper presented different calculation methods, and simulated the fluctuating wind based on random vibration theory using Davenport spectrum. Wind vibration coefficient of simulation results were obtained through analyzing the finite element models. The results was compared with standardize operation results in order to find the change rule of cup type towers wind vibration coefficient. The results show that the wind vibration coefficient of tower body calculated according to the specification is close to the simulation results. But standard formula appears obviously deficiencies on crank arm and cross arm, so the stiffness mutations should be taken into account to calculate the wind vibration coefficient of crank arm and cross arm.

关 键 词：酒杯型输电塔 随机振动理论 时程分析 风振系数 刚度突变 

分 类 号：TU393.3[建筑科学—结构工程]