Numerical antiresonance continuation of structural systems

Résumé : Tuned dynamic absorbers are usually used to counteract vibrations at a given frequency. Presence of non-linearities causes energy-dependent relationship of their resonance and antiresonance frequencies at large amplitude of motion, which consequently leads to adetuning of the absorber from the targeted frequency. This paper presents a procedure to track an extremum point (minimum or maximum) of nonlinear frequency responses, based on a numerical continuation technique coupled to the harmonic balance method to follow periodic solutions in forced steady-state. It thus enable to track a particular antiresonance. The procedure is tested and applied on some application cases to highlight the resonance and antiresonance behavior in presence of geometrically non-linear and/or inertial interactions.
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A. Renault, O. Thomas, H. Mahé. Numerical antiresonance continuation of structural systems. Mechanical Systems and Signal Processing, Elsevier, 2019, 116, pp.963-984. ⟨hal-02154125⟩

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