超大跨度斜拉桥裸塔风致抖振MTMD控制研究

发布时间：2018-04-30 11:27

本文选题：大跨度斜拉桥 + 裸塔　；参考：《空气动力学学报》2015年05期

【摘要】：以主跨1088m的苏通大桥为工程背景,根据规范推荐的风谱模型分别模拟了不同风速下裸塔结构的三维脉动风场,基于ANSYS进行了裸塔在强风作用下的风致抖振响应及其MTMD减振控制研究,重点探讨了MTMD用于大型斜拉桥裸塔抖振控制的效果及其中的关键影响因素。结果表明:TMD的数量、MTMD的质量比、频带宽、阻尼比等参数的变化对其减振效果的影响不尽一致;合理设置MTMD参数可大大降低斜拉桥裸塔的抖振位移响应,实现主塔结构抖振的有效控制。分析结果可为大跨度斜拉桥裸塔结构的风致抖振控制提供参考。
[Abstract]:Taking Sutong Bridge with a main span of 1088m as the engineering background, according to the wind spectrum model recommended by the code, the three-dimensional pulsating wind fields of bare tower structures under different wind speeds are simulated respectively. Based on ANSYS, the wind-induced buffeting response of bare tower under strong wind and its control of MTMD vibration reduction are studied. The effect of MTMD used in buffeting control of bare tower of large cable-stayed bridge and its key influencing factors are discussed. The results show that the variation of mass ratio, frequency bandwidth and damping ratio of the mass ratio and the damping ratio of the TMD have different effects on the damping effect, and the reasonable setting of the MTMD parameters can greatly reduce the buffeting displacement response of the bare tower of the cable-stayed bridge. The buffeting control of the main tower structure is realized. The results can provide a reference for wind induced buffeting control of long span cable-stayed bridge bare tower structure.
【作者单位】：东南大学混凝土及预应力混凝土结构教育部重点实验室;
【基金】：国家重点基础研究发展计划青年科学家专题(2015CB060000) 国家自然科学基金(51378111、51438002) 教育部新世纪优秀人才支持计划(NCET-13-0128) 霍英东教育基金会青年教师基金应用研究项目(142007) 中央高校基本科研业务费专项基金资助项目(2242015K42028)
【分类号】：U441.3;U448.27

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