Details
| Original language | English |
|---|---|
| Title of host publication | Topics in Modal Analysis and Testing, Volume 8 |
| Subtitle of host publication | Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics 2019 |
| Editors | Michael L. Mains, Brandon J. Dilworth |
| Place of Publication | Cham |
| Publisher | Springer Verlag |
| Pages | 153-162 |
| Number of pages | 10 |
| Edition | 1. |
| ISBN (electronic) | 978-3-030-12684-1 |
| ISBN (print) | 978-3-030-12686-5, 978-3-030-12683-4 |
| Publication status | Published - 15 May 2019 |
| Event | 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019 - Orlando, United States Duration: 28 Jan 2019 → 31 Jan 2019 |
Publication series
| Name | Conference Proceedings of the Society for Experimental Mechanics Series |
|---|---|
| ISSN (Print) | 2191-5644 |
| ISSN (electronic) | 2191-5652 |
Abstract
Keywords
- Cyclic symmetry, Electromagnetic excitation, Harmonic excitation, Travelling wave, Turbine disc
ASJC Scopus subject areas
- Engineering(all)
- General Engineering
- Engineering(all)
- Computational Mechanics
- Engineering(all)
- Mechanical Engineering
Cite this
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Topics in Modal Analysis and Testing, Volume 8 : Proceedings of the 37th IMAC, A Conference and Exposition on Structural Dynamics 2019. ed. / Michael L. Mains; Brandon J. Dilworth. 1. ed. Cham: Springer Verlag, 2019. p. 153-162 (Conference Proceedings of the Society for Experimental Mechanics Series).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Modal excitation of circular rotating structures using an innovative electromagnetic device
AU - Hoffmann, Thomas
AU - Jahn, Martin
AU - Panning-von Scheidt, Lars
AU - Wallaschek, Jörg
N1 - Funding information: The investigations were conducted as part of the joint research programme COOREFlex-turbo in the frame of AG Turbo. The work was supported by the Bundesministerium für Wirtschaft und Technologie (BMWi) as per resolution of the German Federal Parliament under grant number 03ET7041L. The responsibility for the content lies solely with its authors.
PY - 2019/5/15
Y1 - 2019/5/15
N2 - Metallic structures like circular plates or turbine discs feature special mode shapes that can be classified by nodal diameters and nodal circles. It is often desirable to experimentally examine just one mode shape with its distinct nodal diameter and nodal circle. To excite just one mode shape at a certain eigenfrequency the circumferential spectrum of the excitation force must not have other frequency content than the desired frequency and additionally have to resemble the mode shape itself. A device capable of creating such a single mode shape excitation has not existed yet. Here, a patented device is presented which is able to excite a single distinct mode shape of a rotating metallic circular structure. To achieve this the device features a toroidal horseshoe electromagnet with a variable gap geometry. By using the variable gap geometry and variable inductor current any modeshape of a metallic circular rotating structure can be excited. It is also possible to excite a combination of modeshapes by linear superposition of the necessary gap geometries. A brief explanation of the device is given followed by experimental results.
AB - Metallic structures like circular plates or turbine discs feature special mode shapes that can be classified by nodal diameters and nodal circles. It is often desirable to experimentally examine just one mode shape with its distinct nodal diameter and nodal circle. To excite just one mode shape at a certain eigenfrequency the circumferential spectrum of the excitation force must not have other frequency content than the desired frequency and additionally have to resemble the mode shape itself. A device capable of creating such a single mode shape excitation has not existed yet. Here, a patented device is presented which is able to excite a single distinct mode shape of a rotating metallic circular structure. To achieve this the device features a toroidal horseshoe electromagnet with a variable gap geometry. By using the variable gap geometry and variable inductor current any modeshape of a metallic circular rotating structure can be excited. It is also possible to excite a combination of modeshapes by linear superposition of the necessary gap geometries. A brief explanation of the device is given followed by experimental results.
KW - Cyclic symmetry
KW - Electromagnetic excitation
KW - Harmonic excitation
KW - Travelling wave
KW - Turbine disc
UR - http://www.scopus.com/inward/record.url?scp=85065989726&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-12684-1_15
DO - 10.1007/978-3-030-12684-1_15
M3 - Conference contribution
AN - SCOPUS:85065989726
SN - 978-3-030-12686-5
SN - 978-3-030-12683-4
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 153
EP - 162
BT - Topics in Modal Analysis and Testing, Volume 8
A2 - Mains, Michael L.
A2 - Dilworth, Brandon J.
PB - Springer Verlag
CY - Cham
T2 - 37th IMAC, A Conference and Exposition on Structural Dynamics, 2019
Y2 - 28 January 2019 through 31 January 2019
ER -