摘要
由于获得实测的台风风速曲线记录比较困难,因此在现有的数学模型基础上开展台风风场的数值模拟研究显得十分必要。文章根据拟合得到的"石沅"台风谱,采用AR模型生成具有时间相关性和空间相关性的脉动风速,从而获得台风空间相关性风场。模拟风速的自相关函数和功率谱密度函数与目标自相关函数和目标功率谱均吻合较好,证明了AR模型具有较高的精度,同时也验证了所取参数的正确性。
As the typhoon wind speed measured curves is difficult obtained,numerical simulation of typhoon wind field based on the existing mathematical model is very necessary. According to Shi Yuan typhoon spectrum,fluctuating wind speed samples with time correlation and spatial correlation is obtained by AR model,then typhoon wind field with spatial correlation is obtained. Compared the auto-correlation and power spectrum density function of simulation sample with the objective auto-correlation and power spectrum density function respectively,it indicates that the AR model for simulation is of highly precision,and the parameters＇ correctness were validated.
作者
谢丹
XIE Dan(Fuzhou Architectural Design Institute, Fuzhou 350011)
出处
《福建建筑》
2016年第9期68-70,共3页
Fujian Architecture & Construction
关键词
台风
功率谱密度
风场模拟
AR模型
Typhoon
Power spectrum density
Wind field simulation
AR model
