Step Responses of a Torsional System with Multiple Clearances: Study of Vibro-Impact Phenomenon using Experimental and Computational Methods

Bibliographic Details
Main Author:	Oruganti, Pradeep Sharma
Language:	English
Published:	The Ohio State University / OhioLINK 2017
Subjects:	Mechanical Engineering Transient responses non-linear models experimental dynamics vibro-impact phenomena metrics for impulsive events
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=osu1483033067455173

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-osu14830330674551732021-08-03T06:39:36Z Step Responses of a Torsional System with Multiple Clearances: Study of Vibro-Impact Phenomenon using Experimental and Computational Methods Oruganti, Pradeep Sharma Mechanical Engineering Transient responses non-linear models experimental dynamics vibro-impact phenomena metrics for impulsive events Recently Krak and Singh (Mech. Syst. Signal Process., 84(A), 598-614, 2017) proposed a scientific experiment that examined vibro-impacts in a torsional system under a step down excitation and provided preliminary measurements and limited non-linear model studies. The major goal of this thesis is to extend the prior work with a focus on the examination of vibro-impact phenomena observed under step responses in a torsional system with one, two or three controlled clearances. First, new measurements are made at several locations with a higher sampling frequency. Measured angular accelerations are examined in both time and time-frequency domains. Minimal order non-linear models of the experiment are successfully constructed, using piecewise linear stiffness and Coulomb friction elements; eight cases of the generic system are examined though only three are experimentally studied. Measured and predicted responses for single and dual clearance configurations exhibit double sided impacts and time varying periods suggest softening trends under the step down torque. Non-linear models are experimentally validated by comparing results with new measurements and with those previously reported. Several metrics are utilized to quantify and compare the measured and predicted responses (including peak to peak accelerations). Eigensolutions and step responses of the corresponding linearized models are utilized to better understand the nature of the non-linear dynamic system. Finally, the effect of step amplitude on the non-linear responses is examined for several configurations, and hardening trends are observed in the torsional system with three clearances. 2017-07-03 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1483033067455173 http://rave.ohiolink.edu/etdc/view?acc_num=osu1483033067455173 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection	NDLTD
language	English
sources	NDLTD
topic	Mechanical Engineering Transient responses non-linear models experimental dynamics vibro-impact phenomena metrics for impulsive events
spellingShingle	Mechanical Engineering Transient responses non-linear models experimental dynamics vibro-impact phenomena metrics for impulsive events Oruganti, Pradeep Sharma Step Responses of a Torsional System with Multiple Clearances: Study of Vibro-Impact Phenomenon using Experimental and Computational Methods
author	Oruganti, Pradeep Sharma
author_facet	Oruganti, Pradeep Sharma
author_sort	Oruganti, Pradeep Sharma
title	Step Responses of a Torsional System with Multiple Clearances: Study of Vibro-Impact Phenomenon using Experimental and Computational Methods
title_short	Step Responses of a Torsional System with Multiple Clearances: Study of Vibro-Impact Phenomenon using Experimental and Computational Methods
title_full	Step Responses of a Torsional System with Multiple Clearances: Study of Vibro-Impact Phenomenon using Experimental and Computational Methods
title_fullStr	Step Responses of a Torsional System with Multiple Clearances: Study of Vibro-Impact Phenomenon using Experimental and Computational Methods
title_full_unstemmed	Step Responses of a Torsional System with Multiple Clearances: Study of Vibro-Impact Phenomenon using Experimental and Computational Methods
title_sort	step responses of a torsional system with multiple clearances: study of vibro-impact phenomenon using experimental and computational methods
publisher	The Ohio State University / OhioLINK
publishDate	2017
url	http://rave.ohiolink.edu/etdc/view?acc_num=osu1483033067455173
work_keys_str_mv	AT orugantipradeepsharma stepresponsesofatorsionalsystemwithmultipleclearancesstudyofvibroimpactphenomenonusingexperimentalandcomputationalmethods
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Step Responses of a Torsional System with Multiple Clearances: Study of Vibro-Impact Phenomenon using Experimental and Computational Methods

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