Details
| Original language | English |
|---|---|
| Title of host publication | Topics in Modal Analysis and Parameter Identification |
| Subtitle of host publication | Volume 9 |
| Editors | Brandon J. Dilworth, Timothy Marinone, Michael Mains |
| Pages | 169-171 |
| Number of pages | 3 |
| ISBN (electronic) | 978-3-031-34942-3 |
| Publication status | Published - 14 Aug 2023 |
| Event | 41st IMAC, A Conference and Exposition on Structural Dynamics, 2023 - Austin, United States Duration: 13 Feb 2023 → 16 Feb 2023 |
Publication series
| Name | Conference Proceedings of the Society for Experimental Mechanics Series |
|---|---|
| ISSN (Print) | 2191-5644 |
| ISSN (electronic) | 2191-5652 |
Abstract
The steady-state response of harmonically excited structures can exhibit a significant traveling wave ratio. Local excitation of structures with locally increased damping or even structures that are proportionally damped, for example, lead to wave propagation phenomena. Since damping distribution plays a key role in formation of traveling waves, it needs to be considered in the dynamic analysis. In this chapter, we analyze the steady-state vibration behavior of 3D printed metamaterial structures. The investigated parts are made of resin and steel by laser sintering. The dynamic analysis with special attention to traveling wave effects is simulated based on finite element method and experimentally validated. Due to the complex geometry of the metamaterial structure, fine meshing is necessary for accurate results, making reduction techniques inevitable. A combination of modal reduction and dynamic condensation is used to obtain the simulated results. In the laboratory, laser scanning vibrometry is used to measure the entire structure and validate the simulations. We show in both simulation and experiment that the studied structures exhibit both standing waves with locally fixed nodal lines and traveling nodal lines with significant traveling wave content, depending on the excitation frequency.
Keywords
- Dynamic condensation, Local damping, Metamaterial, Modal damping, Traveling waves
ASJC Scopus subject areas
- Engineering(all)
- Engineering(all)
- Computational Mechanics
- Engineering(all)
- Mechanical Engineering
Cite this
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Topics in Modal Analysis and Parameter Identification: Volume 9. ed. / Brandon J. Dilworth; Timothy Marinone; Michael Mains. 2023. p. 169-171 (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 - Analysis of Traveling Wave Properties of Mechanical Metamaterial Structures
T2 - 41st IMAC, A Conference and Exposition on Structural Dynamics, 2023
AU - Fischer, Hannes
AU - Tatzko, Sebastian
N1 - Funding Information: This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—462650249.
PY - 2023/8/14
Y1 - 2023/8/14
N2 - The steady-state response of harmonically excited structures can exhibit a significant traveling wave ratio. Local excitation of structures with locally increased damping or even structures that are proportionally damped, for example, lead to wave propagation phenomena. Since damping distribution plays a key role in formation of traveling waves, it needs to be considered in the dynamic analysis. In this chapter, we analyze the steady-state vibration behavior of 3D printed metamaterial structures. The investigated parts are made of resin and steel by laser sintering. The dynamic analysis with special attention to traveling wave effects is simulated based on finite element method and experimentally validated. Due to the complex geometry of the metamaterial structure, fine meshing is necessary for accurate results, making reduction techniques inevitable. A combination of modal reduction and dynamic condensation is used to obtain the simulated results. In the laboratory, laser scanning vibrometry is used to measure the entire structure and validate the simulations. We show in both simulation and experiment that the studied structures exhibit both standing waves with locally fixed nodal lines and traveling nodal lines with significant traveling wave content, depending on the excitation frequency.
AB - The steady-state response of harmonically excited structures can exhibit a significant traveling wave ratio. Local excitation of structures with locally increased damping or even structures that are proportionally damped, for example, lead to wave propagation phenomena. Since damping distribution plays a key role in formation of traveling waves, it needs to be considered in the dynamic analysis. In this chapter, we analyze the steady-state vibration behavior of 3D printed metamaterial structures. The investigated parts are made of resin and steel by laser sintering. The dynamic analysis with special attention to traveling wave effects is simulated based on finite element method and experimentally validated. Due to the complex geometry of the metamaterial structure, fine meshing is necessary for accurate results, making reduction techniques inevitable. A combination of modal reduction and dynamic condensation is used to obtain the simulated results. In the laboratory, laser scanning vibrometry is used to measure the entire structure and validate the simulations. We show in both simulation and experiment that the studied structures exhibit both standing waves with locally fixed nodal lines and traveling nodal lines with significant traveling wave content, depending on the excitation frequency.
KW - Dynamic condensation
KW - Local damping
KW - Metamaterial
KW - Modal damping
KW - Traveling waves
UR - http://www.scopus.com/inward/record.url?scp=85180538613&partnerID=8YFLogxK
U2 - 10.1007/978-3-031-34942-3_21
DO - 10.1007/978-3-031-34942-3_21
M3 - Conference contribution
AN - SCOPUS:85180538613
SN - 9783031349416
T3 - Conference Proceedings of the Society for Experimental Mechanics Series
SP - 169
EP - 171
BT - Topics in Modal Analysis and Parameter Identification
A2 - Dilworth, Brandon J.
A2 - Marinone, Timothy
A2 - Mains, Michael
Y2 - 13 February 2023 through 16 February 2023
ER -