Staff View: Dynamic Analysis of Engine-Mount Systems. :: Digital Library@Villanova University

Dynamic Analysis of Engine-Mount Systems.

Bibliographic Details
Main Authors:	Ashrafiuon, Hashem., Nataraj, C.
Format:	Villanova Faculty Authorship
Language:	English
Published:	1992
Online Access:	http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:173882

Main Authors:

Ashrafiuon, Hashem., Nataraj, C.

Format:

Villanova Faculty Authorship

Language:

English

Published:

1992

Online Access:

http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:173882

id	vudl:173882
record_format	vudl
institution	Villanova University
collection	Digital Library
modeltype_str_mv	vudl-system:ResourceCollection vudl-system:CoreModel vudl-system:CollectionModel
datastream_str_mv	STRUCTMAP PROCESS-MD AUDIT PARENT-LIST MEMBER-QUERY THUMBNAIL DC PARENT-QUERY AGENTS PARENT-LIST-RAW RELS-EXT MEMBER-LIST-RAW LICENSE LEGACY-METS
hierarchytype
hierarchy_all_parents_str_mv	vudl:173857 vudl:172968 vudl:641262 vudl:3 vudl:1
sequence_vudl_173857_str	0000000009
hierarchy_top_id	vudl:641262
hierarchy_top_title	Villanova Faculty Publications
fedora_parent_id_str_mv	vudl:173857
hierarchy_first_parent_id_str	vudl:173882
hierarchy_parent_id	vudl:173857
hierarchy_parent_title	Ashrafiuon Hashem
hierarchy_sequence_sort_str	0000000009
hierarchy_sequence	0000000009
spelling	Dynamic Analysis of Engine-Mount Systems. Ashrafiuon, Hashem. Nataraj, C. This paper examines the forced response of an airplane engine supported by an elastic foundation. It is assumed that the vibrations of the engine and the foundation are small enough such that the equations of motion are linear. The engine is modeled as a rigid body connected to the foundation by standard industrial rubber mounts which act as three-dimensional springs with a significant amount of hysteresis damping. Three fundamental models of the foundation are considered: rigid, statically flexible, and dynamically flexible. In the flexible cases, the foundation is modeled as a clamped circular plate, infinite plate, or any structure identified by a finite element stiffness matrix. In all cases, the mass, stiffness, and damping matrices of the engine-mount system are constructed and the frequency response to the rotating unbalance is determined. For the infinite and clamped circular plate cases, analytical methods are used to determine the real and imaginary parts of the flexibility matrix at different frequencies in response to the harmonic forces transmitted to the plate through the rubber mounts. It is shown here that the foundation elasticity may have a significant effect on the engine vibration and the mounting forces transmitted from the engine to the structure. It is also shown that only the dynamic model of the foundation is able to capture the correct response of the system at frequencies close to the foundation's natural frequencies. 1992 Villanova Faculty Authorship vudl:173882 Journal of Vibration and Acoustics 114, January 1992, 79-83. en
dc.title_txt_mv	Dynamic Analysis of Engine-Mount Systems.
dc.creator_txt_mv	Ashrafiuon, Hashem. Nataraj, C.
dc.description_txt_mv	This paper examines the forced response of an airplane engine supported by an elastic foundation. It is assumed that the vibrations of the engine and the foundation are small enough such that the equations of motion are linear. The engine is modeled as a rigid body connected to the foundation by standard industrial rubber mounts which act as three-dimensional springs with a significant amount of hysteresis damping. Three fundamental models of the foundation are considered: rigid, statically flexible, and dynamically flexible. In the flexible cases, the foundation is modeled as a clamped circular plate, infinite plate, or any structure identified by a finite element stiffness matrix. In all cases, the mass, stiffness, and damping matrices of the engine-mount system are constructed and the frequency response to the rotating unbalance is determined. For the infinite and clamped circular plate cases, analytical methods are used to determine the real and imaginary parts of the flexibility matrix at different frequencies in response to the harmonic forces transmitted to the plate through the rubber mounts. It is shown here that the foundation elasticity may have a significant effect on the engine vibration and the mounting forces transmitted from the engine to the structure. It is also shown that only the dynamic model of the foundation is able to capture the correct response of the system at frequencies close to the foundation's natural frequencies.
dc.date_txt_mv	1992
dc.format_txt_mv	Villanova Faculty Authorship
dc.identifier_txt_mv	vudl:173882
dc.source_txt_mv	Journal of Vibration and Acoustics 114, January 1992, 79-83.
dc.language_txt_mv	en
author	Ashrafiuon, Hashem. Nataraj, C.
spellingShingle	Ashrafiuon, Hashem. Nataraj, C. Dynamic Analysis of Engine-Mount Systems.
author_facet	Ashrafiuon, Hashem. Nataraj, C.
dc_source_str_mv	Journal of Vibration and Acoustics 114, January 1992, 79-83.
format	Villanova Faculty Authorship
author_sort	Ashrafiuon, Hashem.
dc_date_str	1992
dc_title_str	Dynamic Analysis of Engine-Mount Systems.
description	This paper examines the forced response of an airplane engine supported by an elastic foundation. It is assumed that the vibrations of the engine and the foundation are small enough such that the equations of motion are linear. The engine is modeled as a rigid body connected to the foundation by standard industrial rubber mounts which act as three-dimensional springs with a significant amount of hysteresis damping. Three fundamental models of the foundation are considered: rigid, statically flexible, and dynamically flexible. In the flexible cases, the foundation is modeled as a clamped circular plate, infinite plate, or any structure identified by a finite element stiffness matrix. In all cases, the mass, stiffness, and damping matrices of the engine-mount system are constructed and the frequency response to the rotating unbalance is determined. For the infinite and clamped circular plate cases, analytical methods are used to determine the real and imaginary parts of the flexibility matrix at different frequencies in response to the harmonic forces transmitted to the plate through the rubber mounts. It is shown here that the foundation elasticity may have a significant effect on the engine vibration and the mounting forces transmitted from the engine to the structure. It is also shown that only the dynamic model of the foundation is able to capture the correct response of the system at frequencies close to the foundation's natural frequencies.
title	Dynamic Analysis of Engine-Mount Systems.
title_full	Dynamic Analysis of Engine-Mount Systems.
title_fullStr	Dynamic Analysis of Engine-Mount Systems.
title_full_unstemmed	Dynamic Analysis of Engine-Mount Systems.
title_short	Dynamic Analysis of Engine-Mount Systems.
title_sort	dynamic analysis of engine-mount systems.
publishDate	1992
normalized_sort_date	1992-01-01T00:00:00Z
language	English
collection_title_sort_str	dynamic analysis of engine-mount systems.
relsext.hasModel_txt_mv	http://hades.library.villanova.edu:8080/rest/vudl-system:ResourceCollection http://hades.library.villanova.edu:8080/rest/vudl-system:CoreModel http://hades.library.villanova.edu:8080/rest/vudl-system:CollectionModel
fgs.type_txt_mv	http://fedora.info/definitions/v4/repository#Container http://www.w3.org/ns/ldp#Resource http://www.w3.org/ns/ldp#RDFSource http://www.w3.org/ns/ldp#BasicContainer http://www.w3.org/ns/ldp#Container http://fedora.info/definitions/v4/repository#Resource
relsext.hasLegacyURL_txt_mv	http://digital.library.villanova.edu/Villanova%20Digital%20Collection/Faculty%20Fulltext/Ashrafiuon%20Hashem/AshrafiuonHashem-a0437e09-aa46-4071-a733-13c7fe77cb5c.xml
fgs.label_txt_mv	Dynamic Analysis of Engine-Mount Systems.
fgs.createdBy_txt_mv	fedoraAdmin
relsext.sortOn_txt_mv	title
fgs.createdDate_txt_mv	2013-01-22T03:15:40.202Z
fgs.lastModifiedDate_txt_mv	2021-04-12T19:02:06.107Z
fgs.lastModifiedBy_txt_mv	fedoraAdmin
relsext.sequence_txt_mv	vudl:173857#9
relsext.itemID_txt_mv	oai:digital.library.villanova.edu:vudl:173882
fgs.state_txt_mv	Active
relsext.isMemberOf_txt_mv	http://hades.library.villanova.edu:8080/rest/vudl:173857
fgs.ownerId_txt_mv	diglibEditor
has_order_str	no
agent.name_txt_mv	Falvey Memorial Library, Villanova University AAD
license.mdRef_str	http://digital.library.villanova.edu/copyright.html
license_str	protected
has_thumbnail_str	true
THUMBNAIL_contentDigest_digest_str	203c69e18f4f46c81e9892448d2c07cd
first_indexed	2014-01-11T22:46:11Z
last_indexed	2021-04-12T19:10:40Z
_version_	1785892949523955712
subpages

vudl:173882

record_format

vudl

institution

Villanova University

collection

Digital Library

modeltype_str_mv

vudl-system:ResourceCollection
vudl-system:CoreModel
vudl-system:CollectionModel

datastream_str_mv

STRUCTMAP
PROCESS-MD
AUDIT
PARENT-LIST
MEMBER-QUERY
THUMBNAIL
DC
PARENT-QUERY
AGENTS
PARENT-LIST-RAW
RELS-EXT
MEMBER-LIST-RAW
LICENSE
LEGACY-METS

hierarchytype

hierarchy_all_parents_str_mv

vudl:173857
vudl:172968
vudl:641262
vudl:3
vudl:1

sequence_vudl_173857_str

0000000009

hierarchy_top_id

vudl:641262

hierarchy_top_title

Villanova Faculty Publications

fedora_parent_id_str_mv

vudl:173857

hierarchy_first_parent_id_str

vudl:173882

hierarchy_parent_id

vudl:173857

hierarchy_parent_title

Ashrafiuon Hashem

hierarchy_sequence_sort_str

0000000009

hierarchy_sequence

0000000009

spelling

Dynamic Analysis of Engine-Mount Systems.
Ashrafiuon, Hashem.
Nataraj, C.
This paper examines the forced response of an airplane engine supported by an elastic foundation. It is assumed that the vibrations of the engine and the foundation are small enough such that the equations of motion are linear. The engine is modeled as a rigid body connected to the foundation by standard industrial rubber mounts which act as three-dimensional springs with a significant amount of hysteresis damping. Three fundamental models of the foundation are considered: rigid, statically flexible, and dynamically flexible. In the flexible cases, the foundation is modeled as a clamped circular plate, infinite plate, or any structure identified by a finite element stiffness matrix. In all cases, the mass, stiffness, and damping matrices of the engine-mount system are constructed and the frequency response to the rotating unbalance is determined. For the infinite and clamped circular plate cases, analytical methods are used to determine the real and imaginary parts of the flexibility matrix at different frequencies in response to the harmonic forces transmitted to the plate through the rubber mounts. It is shown here that the foundation elasticity may have a significant effect on the engine vibration and the mounting forces transmitted from the engine to the structure. It is also shown that only the dynamic model of the foundation is able to capture the correct response of the system at frequencies close to the foundation's natural frequencies.
1992
Villanova Faculty Authorship
vudl:173882
Journal of Vibration and Acoustics 114, January 1992, 79-83.
en

dc.title_txt_mv

Dynamic Analysis of Engine-Mount Systems.

dc.creator_txt_mv

Ashrafiuon, Hashem.
Nataraj, C.

dc.description_txt_mv

This paper examines the forced response of an airplane engine supported by an elastic foundation. It is assumed that the vibrations of the engine and the foundation are small enough such that the equations of motion are linear. The engine is modeled as a rigid body connected to the foundation by standard industrial rubber mounts which act as three-dimensional springs with a significant amount of hysteresis damping. Three fundamental models of the foundation are considered: rigid, statically flexible, and dynamically flexible. In the flexible cases, the foundation is modeled as a clamped circular plate, infinite plate, or any structure identified by a finite element stiffness matrix. In all cases, the mass, stiffness, and damping matrices of the engine-mount system are constructed and the frequency response to the rotating unbalance is determined. For the infinite and clamped circular plate cases, analytical methods are used to determine the real and imaginary parts of the flexibility matrix at different frequencies in response to the harmonic forces transmitted to the plate through the rubber mounts. It is shown here that the foundation elasticity may have a significant effect on the engine vibration and the mounting forces transmitted from the engine to the structure. It is also shown that only the dynamic model of the foundation is able to capture the correct response of the system at frequencies close to the foundation's natural frequencies.

dc.date_txt_mv

1992

dc.format_txt_mv

Villanova Faculty Authorship

dc.identifier_txt_mv

vudl:173882

dc.source_txt_mv

Journal of Vibration and Acoustics 114, January 1992, 79-83.

dc.language_txt_mv

author

Ashrafiuon, Hashem.
Nataraj, C.

spellingShingle

Ashrafiuon, Hashem.
Nataraj, C.
Dynamic Analysis of Engine-Mount Systems.

author_facet

Ashrafiuon, Hashem.
Nataraj, C.

dc_source_str_mv

Journal of Vibration and Acoustics 114, January 1992, 79-83.

format

Villanova Faculty Authorship

author_sort

Ashrafiuon, Hashem.

dc_date_str

1992

dc_title_str

Dynamic Analysis of Engine-Mount Systems.

description

title

Dynamic Analysis of Engine-Mount Systems.

title_full

Dynamic Analysis of Engine-Mount Systems.

title_fullStr

Dynamic Analysis of Engine-Mount Systems.

title_full_unstemmed

Dynamic Analysis of Engine-Mount Systems.

title_short

Dynamic Analysis of Engine-Mount Systems.

title_sort

dynamic analysis of engine-mount systems.

publishDate

1992

normalized_sort_date

1992-01-01T00:00:00Z

language

English

collection_title_sort_str

dynamic analysis of engine-mount systems.

relsext.hasModel_txt_mv

http://hades.library.villanova.edu:8080/rest/vudl-system:ResourceCollection
http://hades.library.villanova.edu:8080/rest/vudl-system:CoreModel
http://hades.library.villanova.edu:8080/rest/vudl-system:CollectionModel

fgs.type_txt_mv

http://fedora.info/definitions/v4/repository#Container
http://www.w3.org/ns/ldp#Resource
http://www.w3.org/ns/ldp#RDFSource
http://www.w3.org/ns/ldp#BasicContainer
http://www.w3.org/ns/ldp#Container
http://fedora.info/definitions/v4/repository#Resource

relsext.hasLegacyURL_txt_mv

http://digital.library.villanova.edu/Villanova%20Digital%20Collection/Faculty%20Fulltext/Ashrafiuon%20Hashem/AshrafiuonHashem-a0437e09-aa46-4071-a733-13c7fe77cb5c.xml

fgs.label_txt_mv

Dynamic Analysis of Engine-Mount Systems.

fgs.createdBy_txt_mv

fedoraAdmin

relsext.sortOn_txt_mv

title

fgs.createdDate_txt_mv

2013-01-22T03:15:40.202Z

fgs.lastModifiedDate_txt_mv

2021-04-12T19:02:06.107Z

fgs.lastModifiedBy_txt_mv

fedoraAdmin

relsext.sequence_txt_mv

vudl:173857#9

relsext.itemID_txt_mv

oai:digital.library.villanova.edu:vudl:173882

fgs.state_txt_mv

Active

relsext.isMemberOf_txt_mv

http://hades.library.villanova.edu:8080/rest/vudl:173857

fgs.ownerId_txt_mv

diglibEditor

has_order_str

agent.name_txt_mv

Falvey Memorial Library, Villanova University
AAD

license.mdRef_str

http://digital.library.villanova.edu/copyright.html

license_str

protected

has_thumbnail_str

true

THUMBNAIL_contentDigest_digest_str

203c69e18f4f46c81e9892448d2c07cd

first_indexed

2014-01-11T22:46:11Z

last_indexed

2021-04-12T19:10:40Z

_version_

1785892949523955712

subpages

The use of this material may be subject to the copyright law of the United States (Title 17, United States Code) or other third party terms and conditions. The person using the material is responsible for any use or infringement of third party rights.

Disclaimer Of Liability

Villanova University makes no warranty, express or implied, and hereby disclaims all warranties with regard to the information and materials provided, including implied warranties of merchantability, fitness for a particular purpose, or non-infringement, and assumes no legal liability or responsibility for the accuracy, completeness, currency or usefulness of any material displayed or distributed through the Digital Library. Any use or reliance upon such information and materials is at your own risk. In no event will Villanova University be liable to you or any third party for any damages or losses whatsoever resulting from or caused by the Digital Library or its contents, or your access or use thereof.

Disclaimer Of Endorsement

Reference herein to any specific opinion, viewpoint, individual, commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement or recommendation, or any assertion or evaluation as to its validity or veracity, by Villanova University. The views and opinions of authors expressed herein do not necessarily state or reflect those of Villanova University and shall not be used for advertising or product endorsement purposes.

Dynamic Analysis of Engine-Mount Systems.

Rights Information

Disclaimer Of Liability

Disclaimer Of Endorsement

Accessibility Statement

Dynamic Analysis of Engine-Mount Systems.

Similar Items

Rights Information

Disclaimer Of Liability

Disclaimer Of Endorsement

Accessibility Statement