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EXPERIMENTAL INVESTIGATION ON DYNAMIC STIFFENING PHENOMENON[J]. Chinese Journal of Theoretical and Applied Mechanics, 2004, 36(1). DOI: 10.6052/0459-1879-2004-1-2002-122
Citation: EXPERIMENTAL INVESTIGATION ON DYNAMIC STIFFENING PHENOMENON[J]. Chinese Journal of Theoretical and Applied Mechanics, 2004, 36(1). DOI: 10.6052/0459-1879-2004-1-2002-122
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EXPERIMENTAL INVESTIGATION ON DYNAMIC STIFFENING PHENOMENON

  • 上海交通大学建筑工程与力学学院,200030

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  • The study on ``dynamic stiffening'' is currently a focusin the field of flexible multibody system dynamics. A lot of valuableresearches have been done to account for ``dynamic stiffening'' viamathematical model and numerical simulation. However, to one'ssurprise, never had experimental investigations on this problem beenreported. This paper presents experimental investigation on ``dynamicstiffening'' phenomenon. The experiment is based on the prototype of arotating cantilever beam that is often used to discuss the effects of``dynamic stiffening''. The experimental investigation is conducted on asingle-axis air-bearing testbed. A theory model incorporating theeffects of both viscous damping and air drag force is also developedfor the purpose of comparison with experimental results. The phenomenonof ``dynamic stiffening'' is verified by the results of experiment. Thevalidation of the proposed model is confirmed by the experiment, too.
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