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By Alexander F. Vakakis

ISBN-10: 0792370104

ISBN-13: 9780792370109

ISBN-10: 9048157153

ISBN-13: 9789048157150

The nonlinear basic modes of a parametrically excited cantilever beam are developed by means of without delay making use of the tactic of a number of scales to the governing integral-partial differential equation and linked boundary stipulations. The impression of the inertia and curvature nonlin­ earities and the parametric excitation at the spatial distribution of the deflection is tested. the consequences are in comparison with these received through the use of a single-mode discretization. within the absence of linear viscous and quadratic damping, it really is proven that there are nonlinear basic modes, as outlined by means of Rosenberg, even within the presence of a crucial parametric excitation. additionally, the nonlinear mode form got with the direct strategy is in comparison with that bought with the discretization procedure for a few values of the excitation frequency. within the single-mode discretization, the spatial distribution of the deflection is believed a priori to accept by means of the linear mode form ¢n, that's parametrically excited, as Equation (41). hence, the mode form isn't stimulated by means of the nonlinear curvature and nonlinear damping. nonetheless, within the direct method, the mode form isn't really assumed a priori; the nonlinear results regulate the linear mode form ¢n. hence, with regards to large-amplitude oscillations, the single-mode discretization may perhaps yield erroneous mode shapes. References 1. Vakakis, A. F., Manevitch, L. I., Mikhlin, Y. v., Pilipchuk, V. N., and Zevin A. A., Nonnal Modes and Localization in Nonlinear structures, Wiley, manhattan, 1996.

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Normal Modes and Localization in Nonlinear Systems by Alexander F. Vakakis


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