高柔结构的驰振响应分析

本文推导了线性阻尼假设下高柔结构驰振振幅以及长方形截面结构驰振响应的计算公式 ,提出了通过线性和非线性阻尼假设下结构驰振响应的计算 ,取两者中较小的临界风速作为抗风设计依据的建议。研究了气动参数和结构参数的不确定性对发生驰振响应的影响。最后 ,用算例说明了本文的方法

Analysis of Galloping Oscillations of High-rise Flexible Structures

The differential equation concerning crossing wind vibration of high-rise flexible structures is established.The explicit expression of amplitude of galloping oscillation is derived while structural damp is linear.Furthermore,the formulas for galloping oscillations' response are proposed on the assumption that structural damp is nonlinear.The less one between two kinds of critical wind velocities of galloping oscillation is advised as the reference in wind-resistant design.After that,it is studied how the uncertainty of aerodynamic parameters and structural parameters affect the galloping oscillation response of structures.Finally,the method in the paper is illuminated by the numerical examples.