Finite particle method for wind-induced vibration control of transmission towers with spherical spring pendulum
HUANG Zheng1, LIU Shi1,2, NIE Ming1, YANG Yi1,2, GAO Qingshui1,2, ZHANG Chu1,2
1. Electric Power Research Institute of Guangdong Power Grid Co., Ltd., Guangzhou 510080, China;
2. Guangdong Diankeyuan Energy Technology Co., Ltd., Guangzhou 510080, China
Abstract：In order to study control effect of spherical spring pendulum on wind-induced vibration of transmission towers, a reduced model of transmission tower was established with segmental isostiffness beam elements. The element interal force calculation formula based on Timoshenko beam theory for spatial beam structrues was derived. The wind-induced responses of the reduced model and the reduced model-spherical spring pendulum coupled system were analyzed with the finite particle method, respectively. On one hand, due to internal resonance property, the spherical spring pendulum realized a nonlinear energy sink to increase the frequency band width of vibration suppression and improve the robustness. On the other hand, because of nonlinear coupling between the spherical spring pendulum and the reduced model, vibration energy in wind direction was transferred to that in transverse wind direction. Although the system response in transverse wind increased, the overall response of the system decreased. The calculation results showed that the vibration reduction effect of spherical spring pendulum is excellent; when it is installed at 3 positions except tower top, vibration reduction rates for the maxium displacement and the acceleration root mean square are in ranges of 32.5%-42.5% and 35.7%-65.2%, respectively; if keeping mass ratio and installation position unchanged, spherical spring pendulum has a wider design frequency band; using spherical spring pendulum can significantly reduce standard deviation of displacements so as to reduce fatigue damage risk of structures.
黄正1，刘石1,2，聂铭1，杨毅1,2，高庆水1,2，张楚1,2. 利用球形弹簧摆对输电塔风振控制的有限质点法[J]. 振动与冲击, 2020, 39(1): 266-273.
HUANG Zheng1, LIU Shi1,2, NIE Ming1, YANG Yi1,2, GAO Qingshui1,2, ZHANG Chu1,2. Finite particle method for wind-induced vibration control of transmission towers with spherical spring pendulum. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(1): 266-273.
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