脉动风速时程数值模拟

摘要

Wind load was the key control load and its dynamic effect for high-rise and long-span soft structures which were wind-sensitive must be considered. The general situation in numerical simulation of fluctuating wind velocity time history was introduced including traditional harmony superposition method, linear filtering method,as well as wavelet analysis,inverse Fourier transform. Then,fluctuating wind velocity time series of cable-truss mobile hangar was simulated in AR model. Finally,the advantages and disadvantages of various methods were summarized and the prospect of wind velocity time history simulation was looked forward.%对高层、高耸和大跨轻柔等风敏感结构而言，风荷载是主要控制荷载，必须考虑风荷载的动力作用。分析了风速时程模拟方法的概况，包括传统的谐波叠加法、线性滤波法，以及近年来发展起来的小波分析、逆傅立叶变换法。采用AR法模拟了某索-桁移动机库的脉动风速时程。总结了各种方法的优缺点，展望了风速时程模拟的前景。