Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Sherif T. Noah"'
Publikováno v:
Nonlinear Dynamics. 27:1-18
In this paper, we study the effect of a harmonicforcing function and the strength of a nonlinearityon a two-degrees-of-freedom system namely, an elasticpendulum, with internal resonance (for examplenonlinearly elastic springs). The equations can also
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::097ab57a07bea513acd8fd423937b9be
https://doi.org/10.1023/a:1017512317443
https://doi.org/10.1023/a:1017512317443
Autor:
X. Wang, Sherif T. Noah
Publikováno v:
Journal of Vibration and Acoustics. 120:596-606
This study concerns the dynamic response of a rotor landed on auxiliary (catcher) bearings in an Active Magnetic Bearing (AMB) supported rotor, following postulated loss of power or overload of the AMB. An analytical model involving a disk, a shaft a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b820bee271653640a7cf0bdd052b3d7
https://doi.org/10.1115/1.2893869
https://doi.org/10.1115/1.2893869
Autor:
P. Sundararajan, Sherif T. Noah
Publikováno v:
Journal of Vibration and Acoustics. 119:9-20
The analysis of systems subjected to periodic excitations can be highly complex in the presence of strong nonlinearities. Nonlinear systems exhibit a variety of dynamic behavior that includes periodic, almost-periodic (quasi-periodic), and chaotic mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99d62f5c80bba1ab77ca6f14e53c681d
https://doi.org/10.1115/1.2889694
https://doi.org/10.1115/1.2889694
Publikováno v:
Journal of Vibration and Acoustics. 118:375-383
A method of detecting parameter changes using analytical and experimental nonlinear dynamics and chaos is applied to a piecewise-linear oscillator. Experimental data show the chaotic nature of the system through phase portraits, Poincare´ maps, freq
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1f10e83d3ccf488835e86e613071d6e
https://doi.org/10.1115/1.2888193
https://doi.org/10.1115/1.2888193
Autor:
Sherif T. Noah, Young-Bae Kim
Publikováno v:
Journal of Sound and Vibration. 190:239-253
A modified HBM (Harmonic Balance Method)–AFT (Alternating Frequency Time) method is developed to obtain quasi-periodic responses of a horizontal Jeffcott rotor with a bearing clearance. Two truncated double harmonic expansions are used for calculat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1c31d39387d0435d81b9d3fdcde930b7
https://doi.org/10.1006/jsvi.1996.0059
https://doi.org/10.1006/jsvi.1996.0059
Publikováno v:
Journal of Vibration and Control. 1:431-458
Limitations of the currently practiced linearized analysis of industrial rotating machinery are dis cussed. An appreciation of these limitations is particularly significant for the development of new generation, high performance machinery in which ne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::40568a22ce1baa0420013ea20814962a
https://doi.org/10.1177/107754639500100403
https://doi.org/10.1177/107754639500100403
Autor:
R. V. Kesaraju, Sherif T. Noah
Publikováno v:
Nonlinear Dynamics. 6:433-457
The present study applies the recently developed ideas in experimental system modeling to both characterize the behavior of simple mechanical systems and detect variations in their parameters. First, an experimental chaotic time series was simulated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0501b3633c567302b708433591809912
https://doi.org/10.1007/bf00045887
https://doi.org/10.1007/bf00045887
Autor:
Sherif T. Noah, Sang-Kyu Choi
Publikováno v:
Journal of Applied Mechanics. 61:131-138
A complex mode-locking (or entrainment) structure underlying the nonlinear whirling phenomenon of a horizontal Jeffcott rotor with a discontinuous nonlinearity (bearing clearance) was identified. A winding number is introduced as a measure of the rat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1577088fabb382fe66aac67d6729dac6
https://doi.org/10.1115/1.2901387
https://doi.org/10.1115/1.2901387
Publikováno v:
Journal of Vibration and Acoustics. 115:25-32
An analytical and experimental investigation of a vibratory system with a clearance was conducted. A finite element model and an equivalent single degree of freedom closed-form solution were used to determine the dynamic parameters and response of an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39381d3e86c809277cd1d1c36ce5a8e2
https://doi.org/10.1115/1.2930310
https://doi.org/10.1115/1.2930310
Autor:
Sherif T. Noah, Young B. Kim
Publikováno v:
International Journal of Non-Linear Mechanics. 27:833-843
The harmonic balance (HB) with alternating frequency time (AFT) method is applied to a single-degree-of-freedom (SDOF) system with piecewise-smooth non-linearity. The periodic solution of the system with the discontinuous type non-linearity is obtain
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ed0dcfa68b06f454fa93e461ad3f589a
https://doi.org/10.1016/0020-7462(92)90038-9
https://doi.org/10.1016/0020-7462(92)90038-9