Theoretical and Experimental Investigation on Modal Characteristics of Rotating Flexible Beam under Dynamic Boundary Conditions

Abstract:

In order to exactly formulate the dynamics and solve the flexible vibration in the studies on the flexible structure, it is inevitable to study the modal characteristics of the flexible structure; while the accuracy of the modal characteristics relies on the choice of its boundary conditions. This paper investigates the modal characteristics of a flexible beam considering dynamic boundary conditions. Firstly, the first three mode shape functions and frequencies of a sliding-mass beam model are obtained through theoretical solutions. The concept of dynamic boundary conditions is brought forward by the study of special boundary conditions. Secondly, a rotating-free beam model is proposed to describe the dynamic boundary conditions of the rotating flexible beam. The first three frequencies and the mode shape functions of the rotating-free beam model are obtained. Finally, a series of samples and experiments proves the validity of the proposal on the rotating-free beam model.

• Periodical: Applied Mechanics and Materials (Volume 518)
• Pages: 33-40
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.518.33
• Online since: February 2014
• Authors: Hai Bin Yin*, Yu Feng Li, Yan Zhao, Pei Juan Cui
• Keywords: Boundary Condition, Flexible Beam, Modal Characteristics, Rotating Beam

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