An Improved Method and Validation for Large Deflection Analysis of Initially Twisted Composite Rotor Blades
(0) An improved method is presented for large deflection analysis of the initially twisted composite rotor blades.Transverse shearing deformations,warping effects and elastic couplings are considered in the rotor blade cross section properties.The three-dimensional strain field in the rotor blade is expressed in the term of one-dimensional generalized strains.Based on the two-dimensional cross-section analysis and one-dimensional nonlinear beam analysis,the strain energy in the composite rotor blade is deduced.The generalized strains are expressed by the variables which describe the elastic motion of a reference line along the axis of the rotor blade,and all the nonlinear terms are included in the formulation.Analysis results based on a finite element discretization of the resulting equations are presented.Correlations between the analysis results and the experimental data from Princeton beam test and Minguet’s composite beam experiments show that this method is valid for large deflection analysis of composite rotor blades.Compared with other analysis results based on moderate deflection beam theory,improvements of present method are obvious.
rotor composite materials nonlinear large deflection generalized strains
Zhihao Yu Weidong Yang
National Key Laboratory of Rotorcraft Aeromechanics,Nanjing University of Aeronautics and Astronautics,Nanjing,China
国际会议
南京
英文
1-6
2013-08-20（万方平台首次上网日期，不代表论文的发表时间）