Nonlinear Vibrations and Multiple Resonances of Fluid-Filled, Circular Shells, Part 2: Perturbation Analysis

Author:

Pellicano F.1,Amabili M.2,Vakakis A. F.3

Affiliation:

1. Dipartimento di Scienze dell’Ingegneria, Universita` di Modena e Reggio Emilia, Modena, I-41100 Italy

2. Dipartimento di Ingegneria Industriale, Universita` di Parma, Parma, I-43100 Italy

3. Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801

Abstract

The nonlinear ordinary differential equations describing the dynamics of a fluid filled circular cylindrical shell, obtained in Part 1 of the present study, is studied by using a second order perturbation approach and direct simulations. Strong modal interactions are found when the structure is excited with small resonant loads. Modal interactions arise in the whole range of vibration amplitude, showing that the internal resonance condition makes the system non-linearizable even for extremely small amplitudes of oscillation. Stationary and nonstationary oscillations are observed and the complex nature of modal interactions is accurately analyzed. No chaotic motion is observed in the case of 1:1:1:2 internal resonance studied. [S0739-3717(00)01304-0]

Publisher

ASME International

Subject

General Engineering

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