MOTION-RELATED BODY-FORCE FUNCTIONS IN TWO-DIMENSIONAL LOW-SPEED FLOW
MOTION-RELATED BODY-FORCE FUNCTIONS IN TWO-DIMENSIONAL LOW-SPEED FLOW
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DOI：
10.1006/jfls.1999.0252
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发表时间：
2000
影响因子：
3.6
通讯作者：
R. Scanlan
中科院分区：
文献类型：
--
作者：
R. Scanlan
本文研究了在横风向拉长的钝体(如桥梁)的风响应分析中有用的二维力函数。首先回顾了翼型理论二维指数函数、导纳函数和振荡力函数及其相互关系，因为它们具有类比价值。在此基础上，给出了具有垂直湍流分量的侧风作用下钝体截面上升力的谱力表达式。所提出的表达式包含一个气动导纳，该导纳基于钝体截面的测量颤振导数加上关于大气边界层中垂直湍流的一致性的信息。
The paper examines two-dimensional force functions useful in the wind-response analysis of bluff bodies, such as bridges, that are elongated in the across-wind direction. Airfoil-type theoretical 2-D indicial, admittance, and oscillatory force functions and their interrelationships are first recalled for their analogical value. Following this, a spectral force expression is developed for the lift on a bluff section due to a cross-wind with a vertical turbulence component. The expression proposed involves an aerodynamic admittance that is based upon measured flutter derivatives for the bluff section plus information on the coherence of vertical turbulence in the atmospheric boundary layer.