对称非均匀层合板梁的弯扭耦合效应

Bend-twist coupling effect of symmetric un-uniform laminate plate beam

为了研究复合材料风力机叶片的弯扭耦合效应,将风力机叶片简化为对称非均匀铺层层合板梁,采用实验和数值分析方法研究耦合区域对叶片弯扭耦合效应的影响。给出了对称非均匀层合板梁的铺层方式及其制作工艺,设计了对称非均匀层合板梁的弯扭耦合效应实验,给出了实验原理及测量方法,测量了对称非均匀层合板梁的挠度和扭转角。基于ANSYS软件建立了对称非均匀层合板梁的有限元模型,计算了在集中力载荷作用下梁的变形。通过有限元数值分析结果与实验结果对比,结果表明:耦合区域对对称非均匀层合板梁的变形行为产生重要影响,采用中部耦合区域铺层方式可以获得显著的弯扭耦合效应。

The composite wind turbine blade was simplified to a symmetric un-uniform laminate beam for researching its bend-twist coupling effect.The influence of coupling area on bend-twist coupling effect was studied by experiment and numerical analysis method.The ply layouts and manufacturing method of symmetric un-uniform laminated plate beams were presented.The bend-twist coupling test of symmetric un-uniform laminated plate beams was designed,in which the principle and measuring method of the experiment were given.The deflection and twist angle of un-uniform symmetric laminated plate beams were tested in the experiment.The finite element models were established based on ANSYS software and their deformations were got under the concentrated force.Comparing the numerical results with the experimental results,it shows that coupling area has an important influence to deformational behavior of symmetric un-uniform laminated plate beams and coupling in central region can obtain remarkable bend-twist coupling effect.