摘要
以基于阻尼耗能原理的输电塔风振控制为对象,研究基于原型观测数据的时域和频域特征值提取的控制效果及影响因素。首先,将数值仿真分析得到的阻尼器优化布置方案在实际线路上实施,通过原型观测获取1次台风周期的输电塔风振数据,包括施加和未施加阻尼控制的相邻2个同型号杆塔的振动加速度;其次,通过提取时域与频域特征值,计算减振率。分析结果表明:基于风振的峰值和均方根为特征值,减振率分别达到52%~80%和41%~60%;基于功率谱密度函数,顺线向幅值减振率可达50%~70%,横线向幅值减振率可达30%~55%,合成加速度减振率可达30%~55%。分析结果验证了基于阻尼耗能机理的输电塔风振控制策略研究的有效性。
The wind-induced vibration control of transmission tower based on damping energy principle was researched,and the control effect and its influential factors were evaluated by extracting time and frequency domain characteristic value of transmission line prototype field tests as well.Firstly,the optimized arrangement of dampers analyzed by numerical simulation was conducted on transmission line,and the wind-induced vibration acceleration of transmission tower with and without dampers was obtained by prototype measurement.Then,time and frequency domain characteristic value was extracted to calculate damping rate.The results show that damping rate of crest value and root mean square value can respectively reach 52%-80% and 41%-60%.Damping rate along transmission line based on power spectral density function can reach 50%-70%,while damping rate perpendicular to transmission line can reach 30%-55%,and damping rate of resultant acceleration can reach 30%-55%.The effectiveness of the wind-induced control based on damping energy principle is verified.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第9期3911-3917,共7页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51175383)
中国南方电网责任有限公司2011年科技计划项目(K-GD2011-392)
关键词
输电塔
风振控制
阻尼器
功率谱
原型观测
transmission tower
wind induced vibration control
polymer damper
power spectrum
prototype measurement
