...流斑；随机脉动；雷诺应力；非线性特征；直接数值模拟 [gap=1605]Key words: fluid mechanics; turbulent spots; random pulse; Reynolds stress; nonlinear characteristics; direct numerical simulation ..
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随机脉动风场的模拟是大跨度桥梁颤抖振时域分析的前提。
Simulation of stochastic wind velocity field is prerequisite to flutter or buffeting analysis of long-span bridges in time-domain.
与采用超声波、电容作为传感器的相关测量法相比，利用压力传感器测量压力脉动随机信号的相关测量法成本较低。
Compared with correlation measure by adopting ultrasonic and capacity as sensor, it has lower cost that adopting random signal of fluctuating pressure by pressductor measured.
采用快速傅立叶变换法（FFT）编制了风荷载模拟程序，实现了随机风场的计算机仿真，仿真得到了16维脉动风荷载时程样本。
Using FFT to workout a wind load simulation program. The computer simulation of the stochastic wind field is achieved. The 16-dimensional random process is got.
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