Vibrational resonance in a higher-order nonlinear damped oscillator with rough potential
| Autor: | J. A. Laoye, Uchechukwu E. Vincent, K. A. Omoteso, T. O. Roy-Layinde, Oyebola Popoola |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
010308 nuclear & particles physics General Physics and Astronomy Perturbation (astronomy) Surface finish 01 natural sciences Molecular physics 010305 fluids & plasmas Periodic function Vibration Nonlinear system Amplitude 0103 physical sciences Rectangular potential barrier Vibrational resonance |
| Zdroj: | Pramana. 93 |
| ISSN: | 0973-7111 0304-4289 |
| DOI: | 10.1007/s12043-019-1865-5 |
| Popis: | We examine the vibrational resonance (VR) of particles moving in a strongly nonlinear damped medium with a harmonically perturbed potential consisting of a background smooth triple-well potential superimposed by a fast oscillating periodic function and subjected to weak and high-frequency (HF) driving forces. The combined effects of the nonlinear damping inhomogeneity and roughness induced by the harmonic perturbation on the phenomenon of VR were theoretically and numerically analysed. It was found that damping inhomogeneity contributed significantly to the enhancement of resonant states, while potential roughness can be optimised by the HF signal to assist resonance enhancement. Furthermore, the traditional smooth VR shapes occurring in the absence of roughness experienced significant distortion occasioned by potential roughness manifesting as spikes that could ultimately be optimised by large amplitudes of the fast signal to energetically facilitate the potential barrier crossing process, thereby enabling VR enhancement. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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