The addition of an essentially nonlinear membrane absorber to a linear vibroacoustic system with multiple resonances is studied experimentally, using quasiperiodic excitation. An extended experimental dataset of the system response is analyzed under steady state excitation at two frequencies. Thresholds between low and high damping states within the system and associated noise reduction are obs...

The Acoustic Black Hole (ABH) effect refers to a special vibration damping technique adapted thin-walled structures such as beams or plates. It usually consists of local decrease the structure thickness profile, associated thin viscoelastic coating placed in area minimum thickness. has been shown that structural design acts an efficient damper high frequency range, but not at low frequencies. T...

Transverse galloping is a type of flow-induced vibration (FIV) that leads to critical design considerations for engineering structures. A purely nonlinear energy sink (NES) composed ball free rotate in circular track experimentally mitigated the square previous study. The current study introduces model simulating dynamics prism coupled with ball-in-track (BIT) NES and predicting system behaviou...

In this paper one first shows that the slow flow of a mechanical system with unstable mode coupled to Nonlinear Energy Sink (NES) can be reduced, in neighborhood fold point its critical manifold, normal form dynamic saddle-node bifurcation. This allows us then obtain scaling law for dynamics and improve accuracy theoretical prediction mitigation limit NES previously obtained as part zeroth-orde...

1. Abstract Nonlinear Energy Sinks (NESs) are a promising technique for passively reducing the amplitude of vibrations, especially for use as energy pumping devices for buildings under seismic loading. Through nonlinear stiffness properties, a NES is able to passively and irreversibly absorb energy. Unlike the traditional Tuned Mass Damper (TMD), the NES has no inherent natural frequency, allow...

This study investigates the suppression mechanism of instabilities induced by fluid–structure interactions (FSI) using passive vibration absorption devices, such as nonlinear energy sink (NES). The present FSI framework comprises a low-order phenomenological model, wherein wake effect is modeled classical Van der Pol oscillator. structure represented cylindrical bluff body with degree-of-freedo...

We study targeted energy transfer (TET) mechanisms by applying a nonlinear energy sink (NES) to suppress regenerative instabilities in a 2-DOF planar machine tool model. With the help of a numerical continuation tool, DDEBIFTOOL, we show that the tool instability is generated through a subcritical Hopf bifurcation in this simplified tool model. Studying modal energy exchanges reveals that only ...

The nonlinear energy sink (NES), which is proven to perform rapid and passive targeted transfer (TET), has been employed for vibration mitigation in many primary small- large-scale structures. Recently, the feature of bistability, two nontrivial stable equilibria one trivial unstable equilibrium exist, utilized TET what known as bistable NES (BNES). BNES generates a force that incorporates nega...

Abstract Galloping is a critical type of flow-induced vibration (FIV) arising on power transmission lines, high rise buildings, pipe and cables bundles in the oil gas industry. In this paper, we present purely nonlinear energy sink (NES) that mitigates galloping square prism. The NES composed ball rotating freely circular track attached to ball’s dynamics coupled prism way by inertia. We experi...

In this paper, we consider a two-mass 2-DOF vibro-impact system, consisting of linear oscillator, called the primary structure, and an impact damper attached to it. A with small mass hits wall rigidly connected structure. This scheme corresponds single-sided nonlinear energy sink – SSVI NES. It is shown that even light can reduce amplitude velocity structure oscillatory movement, is, decrease i...