《海南风力发电机叶片设计及其有限元分析》-毕业学术论文（设计）.doc

PAGE \* MERGEFORMAT 1 毕 业 论 文（设计） 题 目：风力发电机叶片设计及其有限元分析 摘 要 为了更好地发展我国的风力发电事业，实现风力发电机的国产化，必须通过深入系统的研究，掌握风力机及关键零部件的设计和分析技术。本文根据传统的叶片设计方法设计了400W 小型水平轴风力机叶片，生成了三维几何模型。然后采用有限元方法对叶片进行了振动模态分析，得到各阶振动频率和振型，为防止结构共振提供了依据。针对小型风力机叶片强度分析的特点，提出了一种梁单元与实体单元相结合的高效率的有限元建模方法，并将分析结果与文献中的试验结果相对比，验证了该建模方法的有效性。最后，用该方法分析了自行设计的应用于风光互补路灯的小型风力机叶片在额定风速下的受力与变形，验证了叶片的安全性。 关键词：风力机；叶片；梁单元；有限元模拟 Abstract In order to promote the capability of design and manufacturing of windturbine in China, more study should be done in the field of wind turbinedesign and analysis. In this paper, a blade for 400W Small Horizontal Axis Wind Turbine is designed according to the traditional design procedure and the 3D geometrical model is also created. Then the modal analysis is done through the FE simulation to get the frequency and mode shape, which provides the theoretic basis to prevent resonance. In addition, Aiming at the structural analysis of blade for small wind turbine, this paper presents a FE modeling method with the combination of beam element and solid element. Then comparison of the results between FE analysis and corresponding experiment is made to confirm the modeling validity. Finally the blade designed for the small wind turbine, which is applied to hybrid wind/PV systems, is analyzed in terms of its stress and deformation and to validate its working security Keywords: wind turbine; blade;beam element;FE simulation;optimization 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc324330305 1 绪论 PAGEREF _Toc324330305 \h 1 HYPERLINK \l _Toc324330306 1.1 本文课题研究背景 PAGEREF _Toc324330306 \h 1 HYPERLINK \l _Toc324330307 1.2 风力发电机的设计与分析现状 PAGEREF _Toc324330307 \h 1 HYPERLINK \l _Toc324330308 1.2.1 国内外风力发电机技术现状 PAGEREF _Toc324330308 \h 1 HYPERLINK \l _Toc324330309 1.2.2 小型风力机技术的发展 PAGEREF _Toc324330309 \h 2 HYPERLINK \l _Toc324330310 1.3 本文的研究内容与意义 PAGEREF _Toc324330310 \h 2 HYPERLINK \l _Toc324330311 1.3.1．小型水平轴风力机叶片的设计 PAGEREF _Toc324330311 \h 2 HYPERLINK \l _Toc324330312 1.3.2 叶片动力学分析 PAGER