Modelagem estrutural e dinâmica de pás rotativas por meio do método dos elementos finitos

Abstract

This work follows a finite element model developed in the article by Magari, Shultz and Murthy, which addresses the dynamics of helicopter blades, and extends its application to the analysis of the rotational dynamics of a blade that can be used in various contexts, such as wind turbine blades, helicopter blades and other similar structural applications. The modeling and simulation of the vibrations were performed using MATLAB, implementing a code capable of calculating the natural frequencies considering different boundary conditions, both for the blade in safety and in rotational motion. The fundamental equations used to describe the dynamic behavior of the blade were extracted from the article "Dynamics of Helicopter Rotor Blades" (Computers & Structures, v. 29, n. 5, p. 763-776, 1988), which ensured a consolidated theoretical basis for the development of the model. To validate the results obtained with MATLAB, a detailed comparison was performed with finite element simulations in the FEMAP software. This approach was adopted to ensure the accuracy of the numerical model, since FEMAP allows detailed analysis of structural behavior with high fidelity and can capture effects that are not directly incorporated in the analytical model. The comparison provides greater reliability to the results, verifying the consistency between the developed model and the improvement of a software widely used in the industry.