西南交通大学学报2018，Vol.53Issue(3)：517-524,8.DOI:10.3969/j.issn.0258-2724.2018.03.012
颤振临界风速计算值与试验值的一致性
Consistency between Calculated and Tested Values of Critical Flutter Speed of Flat Box Girder
摘要
Abstract
To obtain the precise flutter performance of a flat box girder,concordances between calculated values and tested values of critical flutter speed were studied,using sectional model wind tunnel testing combined with the calculation method of critical flutter speed. The flutter derivatives under different wind attacks of the box girder were obtained using forced vibration tests. The critical flutter speeds were then calculated using the bimodal coupled flutter analysis method. Finally,the critical flutter velocities were obtained via the sectional model tests under the same conditions. The results indicate that the differences between calculated and tested critical speeds in all cases are minor, and the percent errors are less than 5% when the attack angle is 0°. The differences between calculated and tested critical speeds are substantial when the attack angles are 3° and 5°,and the percent error can reach 10.4%. Based on a comparison of flutter factors derived from the calculation and the test,excluding the effect of nonlinear aerodynamic force and structural damping,it is conjectured that the differences may have been induced by variation in flutter derivatives caused by different coupled motions.关键词
扁平箱梁/颤振临界风速/颤振导数/风攻角/一致性Key words
flat box girder/critical flutter speed/attack angles/wind tunnel test/consistency分类
交通工程引用本文复制引用
伍波,王骑,李志国,廖海黎..颤振临界风速计算值与试验值的一致性[J].西南交通大学学报,2018,53(3):517-524,8.基金项目
国家自然科学基金资助项目(51678508,51308478) （51678508,51308478）
国家973计划资助项目(2013CB036301) （2013CB036301）
