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基于参数化整机模型研究风力机的静态和动态特性,以及叶片局部损伤对单叶片和整机的静动态特性影响规律,揭示叶片局部损伤与这些特性的关系。使用ANSYS的APDL语言,实现MW级水平轴风力机复合材料叶片的参数化建模;采用公共几何元素、连接单元和自由度耦合等方法,组建包含叶片、轮毂、塔架等部件的整机有限元模型。计算分析了重力、离心力和风压力共同作用下正常整机和包含叶片局部损伤的整机在迎风位置时的静态响应。比较了正常和损伤状态下根部固定单叶片和装入整机中叶片的动态应变响应。研究表明:对根部固定的单叶片,风轮面内的动态应变响应随迎风面损伤程度的增大而减小;对整机中的叶片,垂直风轮面的动态应变响应随迎风面损伤程度的增大而增大。研究方法和结论对大型水平轴风力机叶片损伤的在线监测具有重要意义。
Based on the parameterized whole machine model, the static and dynamic characteristics of the wind turbine and the influence of local blade damage on the static and dynamic characteristics of the single blade and the whole machine are studied. The relationship between local damage and these characteristics is revealed. Using APDL language of ANSYS to realize parametric modeling of MW horizontal-axis wind turbine composite blades; the use of common geometric elements, coupling units and coupling of degrees of freedom to form a complete machine including blades, wheels, towers and other components Metamodel. The static response of the normal machine and the whole machine including the local damage of the blade under the windward position is calculated and analyzed under the combined action of gravity, centrifugal force and wind pressure. The dynamic response of the fixed single-blade and the middle-mounted blade under normal and damaged conditions were compared. The results show that the dynamic response of the single fixed blade and the wind turbine surface decreases with the increasing of the windward damage degree. The dynamic response of the blade and the vertical wind turbine surface to the wind turbine varies with the degree of the windward damage Increase and increase. The research methods and conclusions are of great significance to the on-line monitoring of large horizontal axis wind turbine blade damage.