AEVE 3D: Acousto Electrodynamic Three-Dimensional Vibration Exciter for Engineering Testing

Saadatzi, Mohammadsadegh; Saadatzi, Mohammad Nasser; Tavaf, Vahid; Banerjee, Sourav

doi:10.1109/tmech.2018.2841011

Cited by 12 publications

(1 citation statement)

References 30 publications

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“…erefore, effective nonlinear vibration analysis for armature structures to satisfy the test accuracy becomes increasingly important in space engineering. However, for armature structures operating in an electromagnetic environment (as shown in Figure 1), complex geometric configurations not only exist but also are subjected to transverse excitations, in-plane excitations, and electromagnetic excitations [6][7][8]. ese factors significantly increase the analysis complexity of nonlinear vibrations for armature structures.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Vibration Analysis for Stiffened Cylindrical Shells Subjected to Electromagnetic Environment

Bai

Song

Zhang

2021

Shock and Vibration

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The nonlinear vibration behaviors of stiffened cylindrical shells under electromagnetic excitations, transverse excitations, and in-plane excitations are studied for the first time in this paper. Given the first-order shear deformation theory and Hamilton principle, the nonlinear partial differential governing equations of motion are derived with considering the von Karman geometric nonlinearity. By employing the Galerkin discretization procedure, the partial differential equations are diverted to a set of coupled nonlinear ordinary differential equations of motion. Based on the case of 1 : 2 internal resonance and principal resonance-1/2 subharmonic parametric resonance, the multiscale method of perturbation analysis is employed to precisely acquire the four-dimensional nonlinear averaged equations. From the resonant response analysis and nonlinear dynamic simulation, we discovered that the unstable regions of stiffened cylindrical shells can be narrowed by decreasing the external excitation or increasing the magnetic intensity, and their working frequency range can be expanded by reducing the in-plane excitation. Moreover, the different nonlinear dynamic responses of the stiffened cylindrical shell are acquired by controlling stiffener number, stiffener size, and aspect ratio. The presented approach in this paper can provide an eﬃcient analytical framework for nonlinear dynamics theories of stiffened cylindrical shells and will shed light on complex structure design in vibration test engineering.

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Section: Introductionmentioning

confidence: 99%