气动干扰对串列双幅类流线形断面颤振的影响  

Effects of aerodynamic interference on flutter of twin streamline-liked sections in tandem

作　　者：刘小兵[1,2] 杨群[3] 刘志文[2] 

机构地区：[1]石家庄铁道大学风工程研究中心,石家庄050043 [2]湖南大学风工程试验研究中心,长沙410082 [3]石家庄铁道大学土木工程学院,石家庄050043

出　　处：《振动与冲击》2014年第8期161-164,191,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(50608030)

摘　　要：针对串列双幅类流线形断面,在均匀流场中进行了一系列的颤振稳定性风洞试验,并将试验结果与单幅类流线形断面的试验结果进行了对比。研究结果显示:气动干扰降低了双幅类流线形断面的颤振临界风速,间距越小,降低幅度越大;气动干扰增大了双幅类流线形断面的颤振频率,间距越小,增大幅度越大;与单幅类流线形断面相比,气动干扰使双幅类流线形断面的软颤振特性更明显。A series of wind tunnel tests were performed to investigate flutter stability of twin streamline-liked sections in tandem.The test results were compared with those of a single streamline-liked section.The study results showed that the flutter critical wind speed of twin streamline-liked sections in tandem is decreased by aerodynamic interference,the smaller the distance between sections,the lower the flutter critical wind speed;the flutter frequency of two streamline-liked sections in tandem is increased by aerodynamic interference,the smaller the distance between sections,the higher the flutter frequency;the soft flutter characteristic of two streamline-liked sections in tandem is more obvious due to aerodynamic interference compared with that of a single streamline-liked section.

关 键 词：气动干扰 串列双幅类流线形断面 颤振 风洞试验 

分 类 号：TU311.3[建筑科学—结构工程]