Development of an anisotropic co-rotational beam model including variable cross-section

Abstract

The aim of this article is to expand the general approach of the flexible beam model to consider tapered geometry and anisotropic properties by updating the cross-sectional stiffness matrix. The advantage of this approach is that continuously variable cross-section, as well as irregular axes on the cross-sections, are considered simultaneously by the co-rotational method. Anisotropic and isotropic cantilevered beam cases are simulated. A static force or moment is applied as the external load. NREL 5 MW wind turbine blade is analyzed as a practical example. The results are compared against the existing literature and ABAQUS model, and they show excellent agreement.

Keywords:

• Geometric nonlinearity
• co-rotational method
• anisotropic beam
• sectional stiffness
• taper effect
• warping effect

Additional information

Funding

This research was supported by the Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, UK via a PhD scholarship, the Korea Institute of Energy Research (C0-2453) and the National Research Foundation of Korea (NRF), Korea government (MSIT) (No. 2020R1C1C1006006).