摘要
建立加装双调谐质量阻尼器(DTMD)输电塔的多自由度模型和控制方程,推导了"输电塔-DTMD"系统的频响函数并采用频域法进行风振控制分析针对输电塔结构在全生命周期运行中会存在一定范围内的频率摄动问题,研究调谐质量阻尼器(TMD)和DTMD考虑结构频率摄动的优化目标及减振效果的鲁棒性。基于输电塔结构频率固定与摄动两种情况,提出"单频优化"和"宽频优化"两类优化目标,分别搜寻两类优化目标下的DTMD和TMD最优参数,并比较相应的减振效果鲁棒性。结果表明,当结构频率摄动时,基于宽频最优设计的DTMD减振效果表现出较强的鲁棒性,相比于单频目标下的TMD减振效果优势明显,其最小减振率可从13.9%提高到26.4%。因此基于宽频最优设计的DTMD,对输电塔结构全生命周期的风振控制具有更强的适用性。
A multi-degree-of-freedom model and corresponding governing equations were established for a transmission tower equipped with a double tuned mass damper(DTMD).Then the frequency response function of the’transmission tower-DTMD’system was derived,and frequency domain method was adopted to analyze the wind vibration control.In view of the structural frequency perturbation problem of a transmission tower during the full life cycle,the optimization objective and damping effect of tuned mass damper(TMD)and DTMD were studied.Based on fixed and perturbed conditions of structural frequency,two optimization objectives of’single-frequency optimization’and’wide-frequency optimization’were proposed.W ith the two optimization objectives,optimal parameters of the DTMD and TMD were searched respectively,and the damping effects were compared and analyzed.It is shown that,under the fixed condition of structural frequency,the advantage of DTMD is not distinct as the optimal reduction ratio increases slightly compared with the TMD.Nevertheless,under the perturbed condition of structural frequency,the DTMD based on wide-frequency optimization shows strong robustness in damping effect,and the minimum reduction ratio increases from 13.9%to 26.4%compared with the TMD based on single-frequency.Consequently,the DTMD based on wide-frequency design is more applicable for the wind vibration control over transmission tower during the full life cycle.
作者
刘石
张志强
黄国栋
温作鹏
楼文娟
Liu Shi;Zhang Zhiqiang;Huang Guodong;Wen Zuopeng;Lou Wenjuan(Guangdong Dunkcyuan Energy Technology Co.,Ltd.,Guangzhou 510080,China;Elcccric Power Research Instiuitc of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China;Zhanjiang Pbucr Supply Bureau of Guangdong Power Grid Co.,Ltd.,524005,China;College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China)
出处
《特种结构》
2019年第6期101-107,共7页
Special Structures
基金
国家自然科学基金(51678525,51838012)
中国南方电网有限责任公司科技项目(GDKJQQ20153007)
关键词
双调谐质量阻尼器
输电塔
风振控制
鲁棒性
优化控制
Double tuned mass damper
Transmission tower
Wind vibration control
Robustness
Optimization control
