A one dimensional discrete approach for the determination of the cross sectional properties of composite rotor blades

作者：Saravia Martin C^*; Joaquin Saravia L; Cortinez Victor H

来源：Renewable Energy, 2015, 80: 713-723.

DOI：10.1016/j.renene.2015.02.046

• Wind turbines
• Thin-walled beams
• Composite materials
• Finite elements
• Aeroelasticity

This work presents the theoretical aspects of a one dimensional computational approach for the determination of the cross sectional stiffness of composite rotor blades. The method is based on a vector variant of the classical lamination theory embedded into a geometrically exact large deformation-small strain thin-walled beam formulation, which is naturally oriented to multibody problems. The procedures rely on a one-dimensional discretization of the aerodynamic profile of the blade; this generates groups of finite segments of composite laminates which are assembled to find the stiffness properties of the blade cross section. The formulation accounts for warping and transverse shear; the warping problem is solved numerically by means of a one dimensional finite element formulation. The numerical tests show that the formulation gives very accurate results.

• 出版日期2015-8