[1] Lin Yuxuan, Xu Zidong, Wang Hao, Liu Yaodong, et al. Analysis of wind vibration response of suspended derrick under downburst [J]. Journal of Southeast University (English Edition), 2023, 39 (4): 333-339. [doi:10.3969/j.issn.1003-7985.2023.04.002]
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Analysis of wind vibration response of suspended derrick under downburst(
)
下击暴流作用下悬浮抱杆的风振响应分析
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 39
- Issue:
- 2023 4
- Page:
- 333-339
- Research Field:
- Civil Engineering
- Publishing date:
- 2023-12-20
Info
- Title:
- Analysis of wind vibration response of suspended derrick under downburst
- 下击暴流作用下悬浮抱杆的风振响应分析
- Author(s):
- Lin Yuxuan, Xu Zidong, Wang Hao, Liu Yaodong, Zhang Han, Zhao Kaiyong
- Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 211189, China
- Keywords:
- moving downburst; suspended derrick; deterministic-random hybrid model; finite element simulation
- PACS:
- TU351
- DOI:
- 10.3969/j.issn.1003-7985.2023.04.002
- Abstract:
- The vibration response of a suspended derrick was analyzed using the finite element method to accurately estimate its safety performance in a transmission structure under a downburst. Based on the deterministic-random hybrid model, the entire process wind speed of the moving downburst is simulated by a modified stochastic wave-based spectral representation method. Meanwhile, the vibration response of the suspended derrick under a downburst was obtained. The results show that the suspended derrick swings considerably under a moving downburst, and the main structure bends with a displacement amplitude of approximately 1.388 m. Moreover, the maximum tension experienced by the outer tie line and supporting rope are 45.11 and 47.06 kN, respectively. The maximum displacement and tensile force values are observed when the center of the downburst is approximately 1 100 m away from the suspended derrick. This indicates that the suspended derrick is prone to produce a large wind vibration response under the downburst, which will adversely affect the construction safety of the transmission tower. Therefore, performing relevant reinforcement and vibration reduction control measures is essential.
- 为准确评估下击暴流作用下输电塔施工场地抱杆的安全性能, 采用有限元方法分析了悬浮抱杆的风振响应特性.基于确定性-随机混合模型, 通过改进的随机波数谱方法模拟移动下击暴流的全过程风速, 计算得到了悬浮抱杆在下击暴流作用下的风振响应.结果表明:悬浮抱杆在移动下击暴流的作用下将发生大幅摆动, 同时主体结构出现弯曲变形, 其中抱杆中段的顺风向位移幅值可达1.388 m, 外拉线拉力最大值为45.11 kN, 承托绳的最大拉力为47.06 kN, 悬浮抱杆主体结构的最大位移及拉线的最大拉力均在下击暴流中心距离悬浮抱杆1 100 m附近时出现.可见, 下击暴流作用下悬浮抱杆易产生较大的风振响应, 将对输电塔的施工安全产生不利影响, 有必要采取相关的加固与减振控制措施.
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Memo
- Memo:
-
Biographies: Lin Yuxuan(2000—), male, Ph. D. candidate; Wang Hao(corresponding author), male, doctor, professor, wanghao1980@seu.edu.cn.
Foundation items: The National Natural Science Foundation of China(No. 52338011, 51978155, 52208481), China Postdoctoral Science Foundation(No. 2023M730581).
Citation: Lin Yuxuan, Xu Zidong, Wang Hao, et al. Analysis of wind vibration response of suspended derrick under downburst[J].Journal of Southeast University(English Edition), 2023, 39(4):333-339.DOI:10.3969/j.issn.1003-7985.2023.04.002.