摘要
通过风洞试验,研究了不同腹板开孔率的H形吊杆风致失稳特性。节段模型试验发现,腹板不开孔吊杆在小攻角下可发生弯曲驰振;而腹板开孔的吊杆在20°攻角附近较低风速下可发生扭转颤振失稳,且发生扭转颤振失稳的风攻角区间受腹板开孔大小影响明显。气弹模型试验进一步验证了H形吊杆可发生扭转颤振失稳。
Through the wind tunnel tests, this paper investigates the characteristics of windinduced instability of the H-shape hangers with different perforating ratios of their webs. The wind tunnel sectional model tests reveal that the flexural galloping may occur in the hangers under small wind attack angles when the webs are not perforated while the torsional flutter instability may initiate in the hangers at low wind speed of wind attack angle round 20° when the webs are perforated. The influences of sizes of the perforation in the webs on the range of wind attack angles of torsional flutter instability occurrence are significant and the aeroealstic model tests further verify that the torsional flutter instability may initiate in the H-shape hangers.
出处
《世界桥梁》
北大核心
2008年第3期48-51,共4页
World Bridges
关键词
拱桥
吊杆
节段模型
气弹模型
颤振失稳
风洞试验
arch bridge
hanger
sectional model
aeroealstic model
flutter instability
wind tunnel test
