水平轴风力机叶片曲面建模与等几何分析研究  

Isogeometric Analysis Based on Curved Surface of Horizontal-Axis Wind Turbine Blade

作　　者：汪泉[1] 王冯云 胡聪 柳柏杨 WANG Quan;WANG Feng-yun;HU Cong;LIU Bai-yang(School of Mechanical Engineering,Hubei University of Technology,WuhanHubei 430068,China)

机构地区：[1]湖北工业大学机械工程学院,湖北武汉430068

出　　处：《计算机仿真》2023年第6期114-120,共7页Computer Simulation

基　　金：国家自然科学基金(项目编号:51975190);湖北工业大学绿色工业科技引领计划(XJKY2022016)。

摘　　要：针对传统水平轴风力机叶片气动外形建模与结构特性分析,大多采用不同的基函数,从而使叶片可动边界及结构分析模型存在较大误差,进而影响计算精度与求解效率等问题,利用等几何分析法将叶片几何形状与结构模型无缝连接,直接将叶片气动外形的非均匀有理B样条(NURBS)控制向量作为叶片结构控制参数,通过与有限元方法对比,两种方法得出位移最大值偏差为6.133%,应变最大值偏差为6.277%,最大值点位移与应变随时间变化趋势都呈线性变化,直线斜率K值近似相同,验证了等几何分析的正确性与可行性。For the traditional horizontal-axis wind turbine blade aerodynamic shape modeling and structural char-acteristics analysis,most of them use different basis functions,so that there are large errors in the blade movable boundary and structural analysis model,which affects its calculation accuracy and solution efficiency.In this paper,the geometric shape of the blade is seamlessly connected with the structural model using the isogeometric analysis method,and the non-uniform rational B-spline(NURBS)control vector of the aerodynamic shape of the blade is di-rectly used as the blade structure control parameter.By comparing with the finite element method,the maximum devi-ation of the displacement is 6.133%,and the deviation of the maximum strain is 6.277%.The displacement and strain of the maximum point change linearly with time.The linear slope K is approximately the same,which verifies the correctness and feasibility of the isogeometric analysis.

关 键 词：风力机叶片 气动外形设计 等几何分析 

分 类 号：O302[理学—力学]