基于实测风特性的台风模拟研究  

Typhoon Simulation Study Based on Measured Wind Characteristics

作　　者：杨素珍 YANG Suzhen(School of Mechanical Engineering,Zhangzhou Institute of Technology,Zhangzhou 363000,China)

机构地区：[1]漳州职业技术学院机械工程学院

出　　处：《沈阳理工大学学报》2019年第5期89-94,共6页Journal of Shenyang Ligong University

基　　金：福建省中青年科研教育项目(JAT160877)

摘　　要：提出一种结合修正Davenport模型和FFT改进型谐波合成法的台风时程模拟方法。首先,对标准Davenport模型进行系数修正,利用特定地区实测风速值和非线性最小二乘法,建立修正Davenport模型。然后,基于修正Davenport模型和快速FFT改进后的谐波合成法进行台风时程模拟。实验表明,该方法提高了功率谱模型与实测风功率谱的吻合度,保证模拟的风速时程谱更好地反映实测风所在地区的风特性,并利用快速FFT较好地改善算法计算效率低的不足。A typhoon time history simulation method based on harmonic synthesis method improved by modified Davenport model and FFT is proposed.Firstly,the coefficients of the standard Davenport model are revised,the modified Davenport model is established by using the measured wind speed in a specific area and nonlinear least square method.Then,the improved harmonic synthesis method based on the modified Davenport model and fast FFT is used to simulate typhoon time history.Experiments show that this method improves the coincidence between the power spectrum model and the measured wind power spectrum,ensures that the simulated wind speed time history spectrum can better reflect the wind characteristics in the area where the measured wind is located,and improves the low computational efficiency of the algorithm by using fast FFT.

关 键 词：台风模拟 实测风特性 谐波合成法 功率谱 

分 类 号：P458.124[天文地球—大气科学及气象学]