脉动风时程模拟及应用  

Time-history simulation and application of fluctuating wind

作　　者：黄盼盼 胡艳 HUANG Panpan;HU Yan(School of Mechatronic Engineering,Jiangsu Normal University,Xuzhou 221000,China)

机构地区：[1]江苏师范大学机电工程学院,江苏徐州221000

出　　处：《实验技术与管理》2021年第5期158-161,共4页Experimental Technology and Management

基　　金：江苏省高校自然科学研究面上项目(18KJB460012);江苏师范大学人才引进博士基金项目(16XLR017);江苏师范大学实验室建设与管理研究课题(L2020Y13)。

摘　　要：空间一点的自然风由平均风和脉动风组成,平均风速大小不随时间变化,脉动风速大小随时间的变化而随机变化。该文将脉动风近似为平稳高斯随机过程,基于线性滤波法(AR模型),利用MATLAB编程生成顺风向随机脉动风,并将生成的脉动风时程曲线功率谱与目标谱进行对比,证明二者吻合度较好。最后,利用生成的脉动风直观展示了不同风速对高速铁路接触网风振响应的影响。该方法可用于"风工程"课程课堂教学演示,也可用于实验教学,有助于提高学生的科研实践能力。Nature wind at a point in space is composed of average wind and fluctuating wind. The speed of average wind does not change over time, and the speed of fluctuating wind changes randomly over time. In this paper, the fluctuating wind is modeled as a stationary Gaussian stochastic process. To generate along-wind direction fluctuating wind, a procedure is programmed with MATLAB based on linear filtering method(AR model). Finally, the influence of different wind speeds on the wind vibration response of high-speed railway catenary is shown by using the generated fluctuating wind. The simulation power spectrum makes a good match with the target power spectrum. This method can be used in classroom teaching demonstration and experimental teaching of "Wind engineering", which is helpful to improve students’ scientific research and practice ability.

关 键 词：脉动风 AR模型 随机过程 接触线 

分 类 号：U225[交通运输工程—道路与铁道工程]