紊流风场中桥梁气动导数的识别

Identification of Aerodynamic Derivatives of Bridge Deckes in Turbulence Flow

提出一种在紊流风场中识别桥梁断面气动导数的新方法 .根据随机减量的原理 ,从风洞中桥梁节段模型的随机响应中提取自由振动信号 ,再利用时域法对桥梁断面的气动导数进行了总体时域识别 .数值仿真结果表明 。

A new method for identifing aerodynamic derivatives of bridge decks in turbulence flow is put forward in this paper.Based on the principle of random decrement method,free vibration response is obtained from random vibration response of bridge sections.Then aerodynamic derivatives are extracted using time domain method.Numerical simulation results show good agreement with theoretical answers.