流线型箱梁断面涡激力展向相关试验研究

发布时间：2018-05-08 11:59

本文选题：桥梁 + 流线型箱梁断面　；参考：《湖南大学学报(自然科学版)》2017年05期

【摘要】：针对闭口流线型主梁结构涡激力展向相关性问题,在均匀流场条件下分别对振动状态和静止状态流线型主梁节段模型进行了不同风攻角的涡激力展向相关性试验研究,分别分析了流线型主梁断面涡激振动响应、涡激力展向相关性及主梁表面压力等.结果表明:振动状态主梁断面涡激力展向相关系数与振幅、锁定区风速等相关,锁定区上升段主梁断面涡激力展向相关系数大于锁定区最大振幅处主梁断面涡激力展向相关系数,扭转涡振锁定区升力矩展向相关系数大于竖向涡振锁定区竖向涡激力展向相关系数;振动状态主梁断面测点压力系数展向相关系数与振幅相关,振幅越大则相关系数越大.
[Abstract]:Aiming at the spanned correlation of vortex-induced forces in a closed streamlined main girder structure, the spanned correlation of vortex-induced forces at different wind attack angles is studied under the condition of uniform flow field, respectively, for the segmental models of streamline girder in vibration and static states. The vortex-induced vibration response of streamlined main beam section, the spanned correlation of vortex-induced forces and the surface pressure of the main beam are analyzed respectively. The results show that the spanned correlation coefficient of vortex-induced forces is correlated with the amplitude and the wind speed in the locking zone. The cross section vortex-induced force spanned correlation coefficient of the main beam in the locking region is larger than that of the main beam section at the maximum amplitude of the locking zone. The span correlation coefficient of lift moment in torsional vortex locking region is larger than that in vertical vortex vibration locking area, and the span correlation coefficient of measuring point pressure coefficient of main beam section in vibration state is related to amplitude, the larger the amplitude is, the greater the correlation coefficient is.
【作者单位】：湖南大学风工程与桥梁工程湖南省重点实验室;湖南大学土木工程学院;
【基金】：国家自然科学基金资助项目(51178181,51478180) 湖南省高校创新平台开放基金项目(11K015)~~
【分类号】：U446.1

【相似文献】