摘要
通过对节段模型进行风洞测压试验,采用区域性功率谱分析的方法,对桥梁钝体断面在不同攻角下发生"软"颤振时所受气动力高次谐波分量进行了研究。试验结果表明,气动升力中的表现比在气动扭矩中的更显著,发现了"软"颤振时模型所受气动力中高次谐波分量随风攻角变化的规律,以及同攻角下模型表面高次谐波分量分布规律。
The research on the high harmonic component of aerodynamic force at the time of“soft”flutter on the bluff section of bridge under different attack angles is made by performing the wind tunnel pressure test on the segment model and adopting the method of regional power spectrum analysis.The test results show that,the manifestation in the aerodynamic lift is more remarkable than that in the pneumatic torque.The rule that high harmonic component in the aerodynamic force of the model at the time of“soft”flutter changes as the attack angle of wind and the distribution rule of high harmonic component of model surface under the same attack angle are discovered.
作者
袁良东
杨柄楠
YUAN Liang-dong;YANG Bing-nan(Zhengzhou Communications Planning Survey & Design Institute,Zhengzhou 450001,China)
出处
《北方交通》
2018年第12期17-21,共5页
Northern Communications
关键词
桥梁
钝体断面
"软"颤振
气动力
高次谐波分量
Bridge
Bluff section
"Soft"flutter
Aerodynamic force
High harmonic component
