马普托桥颤振稳定性的风洞试验研究  

Wind Tunnel Test Study on Flutter Stability of Maputo Bridge

作　　者：熊龙[1,2] 廖海黎[1,2] 李明水[1,2] 马存明[1,2] 

机构地区：[1]西南交通大学风工程试验研究中心,四川成都610031 [2]风工程四川省重点试验室,四川成都610031

出　　处：《防灾减灾工程学报》2017年第2期321-326,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(51378442)资助

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。The flutter stability of the Maputo Bridge of Mozambique is investigated in this study. A comparison of the aeroelastic response of section model and full bridge aeroelastic model is presented. Type-1 Gumbel distribution is utilized in the fitting of field meteorological statistics to estimate the basic wind speed of bridge. Comprehensive analysis is made to account for the appar- ent difference in the flutter critical wind speed between section model test and full bridge aero- elastic model test. It is noted that the full bridge aeroelastic model test, succeeded in the proper simulation of real bridge dynamics, three-dimensional and multi-modal coupling effect, can take the spanwise correlation of aerodynamic force into account and give a more accurate result. In comparison, section model test will lead to a conservative result.

关 键 词：极值Ⅰ型分布 颤振 节段模型 全桥气弹模型 

分 类 号：TU997[建筑科学—市政工程] U448.25[建筑科学—桥梁与隧道工程]