大跨度桥梁实用颤振控制方法
发布时间：2019-05-14 13:54
【摘要】：当大跨度桥梁面临颤振威胁时,合理有效的被动气动控制方法是避免其在服役期内发生风毁的最好保障.研究了适用于闭口箱梁等3种大跨度桥梁常用主梁的多种被动气动颤振控制方法.结果表明,中央开槽适合于提高气动稳定性能较好的闭口箱梁的颤振性能,风嘴则能显著提升气动外形钝化的开口边主梁的颤振临界风速,而中央稳定板几乎适合于各种主梁形式.此外,对检查车轨道等附属装置进行局部调位也可以起到良好的颤振控制效果,而多种控制方法的合理组合可以进一步发挥其控制作用.气动控制措施的效果与其设置参数紧密相关,针对各种控制方法的合理参数设置进行了研究和优化.
[Abstract]:When the long-span bridge is threatened by flutter, a reasonable and effective passive pneumatic control method is the best guarantee to avoid wind damage during the service period. A variety of passive pneumatic flutter control methods for three kinds of long-span bridges, such as closed box girder, are studied. The results show that the central slotting is suitable for improving the flutter performance of the closed box girder with good pneumatic stability, while the nozzle can significantly increase the flutter critical wind speed of the open side main beam with passivated pneumatic shape. The central stabilizer plate is almost suitable for all kinds of main beam forms. In addition, the local adjustment of vehicle tracks and other ancillary devices can also play a good flutter control effect, and the reasonable combination of various control methods can further play its control role. The effect of pneumatic control measures is closely related to its setting parameters. The reasonable parameter settings of various control methods are studied and optimized.
【作者单位】： 同济大学土木工程防灾国家重点实验室;
【基金】：国家自然科学基金(51078276) 国家重点实验室自主课题(SLDRCE10-B-05) 国家“九七三”重点基础研究发展计划(2013CB036300)
【分类号】：U441.3
[Abstract]:When the long-span bridge is threatened by flutter, a reasonable and effective passive pneumatic control method is the best guarantee to avoid wind damage during the service period. A variety of passive pneumatic flutter control methods for three kinds of long-span bridges, such as closed box girder, are studied. The results show that the central slotting is suitable for improving the flutter performance of the closed box girder with good pneumatic stability, while the nozzle can significantly increase the flutter critical wind speed of the open side main beam with passivated pneumatic shape. The central stabilizer plate is almost suitable for all kinds of main beam forms. In addition, the local adjustment of vehicle tracks and other ancillary devices can also play a good flutter control effect, and the reasonable combination of various control methods can further play its control role. The effect of pneumatic control measures is closely related to its setting parameters. The reasonable parameter settings of various control methods are studied and optimized.
【作者单位】： 同济大学土木工程防灾国家重点实验室;
【基金】：国家自然科学基金(51078276) 国家重点实验室自主课题(SLDRCE10-B-05) 国家“九七三”重点基础研究发展计划(2013CB036300)
【分类号】：U441.3
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