马普托桥颤振稳定性的风洞试验研究

发布时间：2018-06-26 05:21

本文选题：极值Ⅰ型分布 + 颤振　；参考：《防灾减灾工程学报》2017年02期

【摘要】：以莫桑比克马普托桥为工程背景,根据现场气象统计资料,采用Gumbel极值Ⅰ型分布曲线拟合的方法确定基本风速,并利用节段模型及全桥气弹模型,对其颤振稳定性进行详细研究。基于主梁节段模型和全桥气弹模型试验获得的颤振临界风速存在明显的差异,对其原因做了较为全面的分析。由于全桥气弹模型能够更好的模拟实桥的动力特性,能够反映实际三维空间效应、多模态耦合效应以及气动力相关性效应等,因此全桥气弹模型试验结果较准确,相比之下,节段模型试验结果偏于保守。
[Abstract]:Taking the Maputo Bridge in Mozambique as the engineering background, the basic wind speed is determined by the method of Gumbel extreme value I distribution curve fitting according to the field meteorological statistics data, and the segmental model and the full bridge Aeroelastic model are used. The flutter stability is studied in detail. Based on the difference of critical flutter velocity between the main girder segment model and the full bridge Aeroelastic model test, the reasons are analyzed comprehensively. Since the full bridge Aeroelastic model can better simulate the dynamic characteristics of the real bridge and can reflect the actual three-dimensional effect, multi-modal coupling effect and aerodynamic correlation effect, the results of the full-bridge Aeroelastic model test are more accurate. The results of segmental model test are conservative.
【作者单位】：西南交通大学风工程试验研究中心;风工程四川省重点试验室;
【基金】：国家自然科学基金项目(51378442)资助
【分类号】：U446.1

【相似文献】