Special Issue: Selected Papers from DSTA 2019 ConferenceSource: Journal of Computational and Nonlinear Dynamics:;2020:;volume( 015 ):;issue: 012::page 0120301-1DOI: 10.1115/1.4048119Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This special issue would not have been possible with the terrific support of the ASME Journal of Computational and Nonlinear Dynamics, in particular, that of Ms. Amy Suski. Many thanks to her, for making this issue possible.The investigations presented in “Breathing Crack Model Effect on Rotor's Postresonance Backward Whirl,” by Alzarooni, Al-Shudeifat, Shiryayev, Nataraj are focused on the appearance of postresonance backward whirl in a rotor model with a breathing crack. This phenomenon could be employed as an indicator of crack and bearing damage in rotor systems that undergo recurrent passage through critical forward whirl rotational speed during startup and coast down operations. A finite element model is used to develop the linear-time-varying equations of motion of the considered accelerated cracked rotor. The whirl response is obtained through direct numerical integration, since in addition, the effect of bearing anisotropy on the postresonance backward whirl excitation is investigated. The authors found that the appearance of the postresonance backward whirl zones is significantly affected by the depth of the crack, angular acceleration rate, anisotropy of bearings, and the orientation of the unbalance force vector with respect to the crack opening direction.
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contributor author | Awrejcewicz, Jan | |
contributor author | Balthazar, José M. | |
contributor author | Olejnik, Paweł | |
date accessioned | 2022-02-04T22:05:58Z | |
date available | 2022-02-04T22:05:58Z | |
date copyright | 10/23/2020 12:00:00 AM | |
date issued | 2020 | |
identifier issn | 1555-1415 | |
identifier other | jam_87_12_121001.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4274870 | |
description abstract | This special issue would not have been possible with the terrific support of the ASME Journal of Computational and Nonlinear Dynamics, in particular, that of Ms. Amy Suski. Many thanks to her, for making this issue possible.The investigations presented in “Breathing Crack Model Effect on Rotor's Postresonance Backward Whirl,” by Alzarooni, Al-Shudeifat, Shiryayev, Nataraj are focused on the appearance of postresonance backward whirl in a rotor model with a breathing crack. This phenomenon could be employed as an indicator of crack and bearing damage in rotor systems that undergo recurrent passage through critical forward whirl rotational speed during startup and coast down operations. A finite element model is used to develop the linear-time-varying equations of motion of the considered accelerated cracked rotor. The whirl response is obtained through direct numerical integration, since in addition, the effect of bearing anisotropy on the postresonance backward whirl excitation is investigated. The authors found that the appearance of the postresonance backward whirl zones is significantly affected by the depth of the crack, angular acceleration rate, anisotropy of bearings, and the orientation of the unbalance force vector with respect to the crack opening direction. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Special Issue: Selected Papers from DSTA 2019 Conference | |
type | Journal Paper | |
journal volume | 15 | |
journal issue | 12 | |
journal title | Journal of Computational and Nonlinear Dynamics | |
identifier doi | 10.1115/1.4048119 | |
journal fristpage | 0120301-1 | |
journal lastpage | 0120301-11 | |
page | 11 | |
tree | Journal of Computational and Nonlinear Dynamics:;2020:;volume( 015 ):;issue: 012 | |
contenttype | Fulltext |