dorsal/arxiv
View SchemaExperiments and numerical results on nonlinear vibrations of an impacting hertzian contact. Part 2: random excitation
| Authors | Joël Perret-Liaudet, Emmanuel Rigaud |
|---|---|
| Categories | |
| ArXiv ID | physics/0701033 |
| URL | https://arxiv.org/abs/physics/0701033 |
| DOI | 10.1016/S0022-460X(02)01267-1 |
| Journal | Journal of Sound and Vibration 265 (2003) 309-327 |
Abstract
Non linear dynamic behaviour of a normally excited preloaded Hertzian contact (including possible contact losses) is investigated using an experimental test rig. It consists on a double sphere plane contact loaded by the weight of a rigid moving mass. Contact vibrations are generated by a external Gaussian white noise and exhibit vibroimpact responses when the input level is sufficiently high. Spectral contents and statistics of the stationary transmitted normal force are analysed. A single-degree-of-freedom non linear oscillator including loss of contact and Hertzian non linearities is built for modelling the experimental system. Theoretical responses are obtained by using the stationary Fokker-Planck equation and also Monte Carlo simulations. When contact loss occurrence is very occasional, numerical results shown a very good agreement with experimental ones. When vibroimpacts occur, results remain in reasonable agreement with experimental ones, that justify the modelling and the numerical methods described in this paper. The contact loss non linearity appears to be rather strong compared to the Hertzian non linearity. It actually induces a large broadening of the spectral contents of the response. This result is of great importance in noise generation for a lot of systems such as mechanisms using contacts to transform motions and forces (gears, ball-bearings, cam systems, to name a few). It is also of great importance for tribologists preoccupied to prevent surface dammage.
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"abstract": "Non linear dynamic behaviour of a normally excited preloaded Hertzian contact\n(including possible contact losses) is investigated using an experimental test\nrig. It consists on a double sphere plane contact loaded by the weight of a\nrigid moving mass. Contact vibrations are generated by a external Gaussian\nwhite noise and exhibit vibroimpact responses when the input level is\nsufficiently high. Spectral contents and statistics of the stationary\ntransmitted normal force are analysed. A single-degree-of-freedom non linear\noscillator including loss of contact and Hertzian non linearities is built for\nmodelling the experimental system. Theoretical responses are obtained by using\nthe stationary Fokker-Planck equation and also Monte Carlo simulations. When\ncontact loss occurrence is very occasional, numerical results shown a very good\nagreement with experimental ones. When vibroimpacts occur, results remain in\nreasonable agreement with experimental ones, that justify the modelling and the\nnumerical methods described in this paper. The contact loss non linearity\nappears to be rather strong compared to the Hertzian non linearity. It actually\ninduces a large broadening of the spectral contents of the response. This\nresult is of great importance in noise generation for a lot of systems such as\nmechanisms using contacts to transform motions and forces (gears,\nball-bearings, cam systems, to name a few). It is also of great importance for\ntribologists preoccupied to prevent surface dammage.",
"arxiv_id": "physics/0701033",
"authors": [
"Jo\u00ebl Perret-Liaudet",
"Emmanuel Rigaud"
],
"categories": [
"physics.class-ph"
],
"doi": "10.1016/S0022-460X(02)01267-1",
"journal_ref": "Journal of Sound and Vibration 265 (2003) 309-327",
"title": "Experiments and numerical results on nonlinear vibrations of an impacting hertzian contact. Part 2: random excitation",
"url": "https://arxiv.org/abs/physics/0701033"
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