Crack Effects on the Dynamic Behavior of Orthotropic Composite Pre-Twisted Blades Using Radial Basis Function Model

摘要

The eigenvalue problem of a tapered pre-twisted orthotropic composite blade is studied using a radial basis function model. The pre-twisted orthotropic composite blade is characterized with an Euler-Bernoulli beam model. The radial basis function model is used to transform the partial differential equations of a tapered pre-twisted orthotropic composite blade into a discrete eigenvalue problem. This study also investigated the effects of fiber orientation, crack, incline angle and rotation speed on the frequencies of a tapered pre-twisted orthotropic composite blade. Integrity and computational efficiency were compared in the radial basis function model in numerous case studies. Numerical results confirmed that the radial basis function model is accurate and efficient for modeling a pre-twisted orthotropic composite blade.