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This research was funded in whole or in part by the National Science Centre, Poland 2021/41/B/ST8/03190. For the purpose of Open Access, the author has applied a CC-BY public copyright licence to any Author Accepted Manuscript (AAM) version arising from this submission. The first author would like to acknowledge the financial support of the National Centre for Research and Development under the project POWR.03.02.00-IP.08-00-DOK/16 within the framework of “The International Ph.D. Course in Mechanics”, provided by the Faculty of Mechanical Engineering at Lublin University of Technology, POWR.03.02.00-00-I017/16-00.
This study primarily focuses on conducting, both experimentally and numerically, a modal
analysis of a cantilever composite beam. Through extended numerical simulations, we investigate
Campbell diagrams, which, depending on the rotation speed of the structure, comprise natural
frequencies and their corresponding modal shapes. Our results are categorized into two main aspects:
the classical single-mode behavior and an innovative extension involving linearly coupled modal
analysis. One key novelty of our research lies in the introduction of an analytical description for
coupled mode shapes, which encompass various deformations, including bending, longitudinal
deformations, and twisting. The most pronounced activation of dynamic couplings within the linear
regime for a 45◦ preset angle is observed, though the same is not true of the 0◦ and 90◦ preset angles,
for which these couplings are not visible. In addition to the modal analysis, our secondary goal is to
assess the lift, drag forces, and moment characteristics of a rectangular profile in uniform flow. We
provide insights into both the static and dynamic aerodynamic responses experienced by the beam
within an operational frequency spectrum. This study contributes to a deeper understanding of the
dynamics of composite rotating beams and their aerodynamic characteristics.
