Article ID Journal Published Year Pages File Type
10414078 Communications in Nonlinear Science and Numerical Simulation 2014 14 Pages PDF
Abstract
In Part I of this work (Comm. Nonlin. Sci. Numer. Simulat. 18 (2013) 1710-1724), an experimental investigation on nonlinear low-frequency gravity water waves in a cylindrical shell subjected to high-frequency horizontal excitations was reported. To reveal the mechanism of this phenomenon, a theoretical analysis is now presented as Part II of the work. A set of nonlinear equations for two mode interactions is established based on variational principle of fluid-shell coupled system. Theory proofs that for high frequency mode of circumferential wave number m nonlinear interaction exits only with gravity wave modes of circumferential wave number zero or 2m. Multi-scale analysis reveals that appearance of such phenomenon is due to Hopf bifurcation of the dynamic system. Curves of critic excitation force with respect to excitation frequency are obtained by analysis. Theoretical results show good qualitative and quantitative agreement with experimental observations.
Related Topics
Physical Sciences and Engineering Engineering Mechanical Engineering
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