大型风力机风雨结构三场耦合分析  

Three-field coupling analysis for large-scale wind turbine with wind-rain-structure

作　　者：高乾丰[1] 董辉[1] 邓宗伟[2,3] 朱志祥[2,3] 彭文春 

机构地区：[1]湘潭大学土木工程与力学学院,湖南湘潭411105 [2]湖南城市学院土木工程学院,湖南益阳413000 [3]中南大学土木工程学院,湖南长沙410075 [4]中国电建集团中南勘测设计研究院有限公司,湖南长沙410014

出　　处：《中南大学学报（自然科学版）》2016年第3期1011-1016,共6页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51108397);湖南省科技计划项目(2013GK3086);湖南省教育厅科学研究重点项目(14A024);中国水电顾问集团中南勘测设计研究院科技项目(YJ2012 2.6)~~

摘　　要：针对风雨共同作用下的风力机,提出风-雨-结构三场单向耦合分析方法。将风场和雨滴分别视为连续相和离散相,利用计算流体力学软件对风驱雨过程进行模拟,获得风力机表面的风压力和雨水撞击力。将风雨荷载网格节点力编辑成命令流文件导入有限元软件中进行分析,实现风雨场和结构之间的耦合,得到风雨共同作用下风力机的受力和变形特性。研究结果表明:在风速v10为7.565 m/s、降雨强度I为50 mm/h的天气条件下,雨荷载对风力机整体的受力和变形的影响较小。A one-way coupling analysis method of wind-rain-structure three-field was proposed for wind turbine during the simultaneous action of wind and rain. Taking the wind field and the raindrops considered as the continuous phase and the discrete phase respectively, the process of wind driving rain was simulated by computational fluid dynamics software, and the wind pressure and the raindrop impact force on the wind turbine were obtained. The coupling between the wind-rain field and the structure was realized by importing command stream contained grid nodal forces of wind and rain loads into finite element software, and then the stress and deformation characteristics of the wind turbine during the simultaneous action of wind and rain were acquired. The results show that the stress and deformation of the whole wind turbine are less influenced by rain load in the weather condition of wind speed v10=7.565 m/s and rainfall intensity I= 50 mm/h.

关 键 词：多场耦合 风雨荷载 水平轴风力机 CFD模拟 离散相模型 有限元 

分 类 号：TK8[动力工程及工程热物理—流体机械及工程]