移动型下击暴流作用下定日镜动力响应特性研究  

Study on dynamic response characteristics of heliostat under moving downburst

作　　者：吉柏锋[1] 邢盼盼 吴会平 邱鹏辉 熊倩 Ji Baifeng;Xing Panpan;Wu Huiping;Qiu Penghui;Xiong Qian(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China;Wuhan Municipal Engineering Quality Supervision Station,Wuhan 430015,China)

机构地区：[1]武汉理工大学土木工程与建筑学院,湖北武汉430070 [2]武汉市市政工程质量监督站,湖北武汉430015

出　　处：《可再生能源》2023年第1期30-38,共9页Renewable Energy Resources

基　　金：国家自然科学基金项目(51308430);湖北省自然科学基金项目(2020CFB524);海南省科技计划三亚崖州湾科技城自然科学基金联合项目(2021JJLH0011)。

摘　　要：为研究移动型下击暴流作用下塔式太阳能定日镜的风振响应特性,文章以中国某塔式太阳能光热发电站定日镜的有限元模型为基础,进行了动力特性分析,模拟了作用于定日镜的下击暴流脉动的风速时程,采用Newmark-β法分析了下击暴流风场作用下定日镜的风振响应。研究结果表明:不同工作仰角的定日镜处于距离下击暴流中心1倍出流直径左右时,风致位移响应峰值和风致应力响应峰值最大;相比于0°,45°和60°仰角,定日镜仰角为30°时,镜面峰值位移最大,各部件的应力峰值也最大,且都小于相对应材料的屈服强度;定日镜在不同仰角下,镜面最大位移发生在最上部单元子镜,镜面背部桁架最大等效应力均小于扭力管及立柱的最大等效应力。In order to study the wind-induced response characteristics of tower solar heliostats under moving downburst,a finite element model of the heliostats of a tower solar thermal power station in China was established and the dynamic characteristics were analyzed.The wind speed time history of downburst pulsation acting on the heliostat was simulated,and the Newmark-method was used to analyze the wind vibration response of the heliostat under the action of moving downburst wind field.The results show that the peak wind-displacement response and peak windstress response are maximum when the fixed heliostats with different working elevation angles are at a distance of about 1.0D from the center of the downburst.Compared with 0°,45°,60°elevation angles,the peak displacement of the mirror surface is largest at an elevation angle of 30°,and the peak stress of each component is also largest and less than the yield strength of the corresponding material.Under different elevation angles of the heliostat,the maximum displacement of the mirror surface occurs in the uppermost unit sub-mirror,and the maximum equivalent stress of the truss on the back of the mirror surface is less than the maximum equivalent stress of the torsion tube and column.

关 键 词：定日镜 下击暴流 风速时程 风振响应 

分 类 号：TK513[动力工程及工程热物理—热能工程] TU312[建筑科学—结构工程]