Presented By: Aerospace Engineering
AE Defense: Active Metastructures for Light-weight Vibration Suppression
Aerospace Engineering PhD Candidate: Katie Reichl, Dissertation Chair: Professor Daniel J. Inman
Katie Reichl
PhD Candidate
Aerospace Engineering
The primary objective of this work is to examine the effectiveness of metastructures for vibration suppression from a weight standpoint. Metastructures, a metamaterial inspired concept, are structures with distributed vibration absorbers. In automotive and aerospace industries, it is critical to have low levels of vibrations while also using lightweight materials. Previous work has shown that metastructures are effective at mitigating vibrations, but do not consider the effects of mass. This work considers mass by comparing a metastructure to a baseline structure of equal mass with no absorbers. Results show that it is possible to obtain a favorable vibration response without adding additional mass to the structure. Experimental prototypes of the metastructures are printed using a 3D printer which uses polymer materials; these materials exhibit viscoelastic properties which influence the damping inherent in the materials. The frequency and temperature dependent complex modulus of these materials is measured and modeled using the Golla-Hughes-McTavish model. Lastly, the concept of adding active vibration control to a metastructure to get additional vibration suppression is explored. This is done by adding piezoelectric materials to the metastructure and utilizing a positive position feedback control law to further reduce vibrations.
Publications
Journal Publications
1. K. K. Reichl and D. J. Inman, “Lumped mass model of a 1D metastructure for vibration suppression with no additional mass,” Journal of Sound and Vibration, 2017.
2. K. K. Reichl and D. J. Inman, “Dynamic mechanical and thermal analysis of Objet Connex 3D printed materials,” Experimental Techniques, 2018.
3. K. K. Reichl and D. J. Inman, “Temperature-dependent damping in 3D printed polymer structures,” Journal of Vibration and Acoustics, 2018 (submitted).
Conference Proceedings
1. K. K. Reichl and D. J. Inman, “Lumped Mass Model of a 1D Metastructure with Vibration Absorbers with Varying Mass,” in 36th International Modal Analysis Conference, 2018.
2. D. J. Inman, K. K. Reichl and B. C. Essink, “A Metastructure Approach to Damping and Vibration Absorption,” in 17th Asian Pacific Vibration Conference, 2017.
3. M. L. Liu, K. K. Reichl and D. J. Inman, “Complex Modulus Variation by Manipulation of Mechanical Test Method and Print Direction,” in 2017 Society of Engineering Mechanics Annual Conference, 2017.
4. K. K. Reichl and D. J. Inman, “Constant Mass Metastructure with Vibration Absorbers of Linearly Varying Natural Frequencies,” in 35th International Modal Analysis Conference, 2017.
5. K. K. Reichl and D. J. Inman, “Metastructures and Active Vibration Control,” in 27th International Conference on Adaptive Structures Technologies, 2016.
6. K. K. Reichl and D. J. Inman, “Dynamic Modulus Properties of Objet Connex 3D Printer Digital Materials,” in 34th International Modal Analysis Conference, 2016.
7. K. K. Reichl and D. J. Inman, “Finite Element Modeling of Longitudinal Metastructures for Passive Vibration Suppression,” 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2016.
8. K. K. Reichl and D. J. Inman, “Modelling of low-frequency broadband vibration mitigation for a bar experiencing longitudinal vibrations using distributed vibration absorbers,” in 20th International Conference on Composite Materials, 2015.
PhD Candidate
Aerospace Engineering
The primary objective of this work is to examine the effectiveness of metastructures for vibration suppression from a weight standpoint. Metastructures, a metamaterial inspired concept, are structures with distributed vibration absorbers. In automotive and aerospace industries, it is critical to have low levels of vibrations while also using lightweight materials. Previous work has shown that metastructures are effective at mitigating vibrations, but do not consider the effects of mass. This work considers mass by comparing a metastructure to a baseline structure of equal mass with no absorbers. Results show that it is possible to obtain a favorable vibration response without adding additional mass to the structure. Experimental prototypes of the metastructures are printed using a 3D printer which uses polymer materials; these materials exhibit viscoelastic properties which influence the damping inherent in the materials. The frequency and temperature dependent complex modulus of these materials is measured and modeled using the Golla-Hughes-McTavish model. Lastly, the concept of adding active vibration control to a metastructure to get additional vibration suppression is explored. This is done by adding piezoelectric materials to the metastructure and utilizing a positive position feedback control law to further reduce vibrations.
Publications
Journal Publications
1. K. K. Reichl and D. J. Inman, “Lumped mass model of a 1D metastructure for vibration suppression with no additional mass,” Journal of Sound and Vibration, 2017.
2. K. K. Reichl and D. J. Inman, “Dynamic mechanical and thermal analysis of Objet Connex 3D printed materials,” Experimental Techniques, 2018.
3. K. K. Reichl and D. J. Inman, “Temperature-dependent damping in 3D printed polymer structures,” Journal of Vibration and Acoustics, 2018 (submitted).
Conference Proceedings
1. K. K. Reichl and D. J. Inman, “Lumped Mass Model of a 1D Metastructure with Vibration Absorbers with Varying Mass,” in 36th International Modal Analysis Conference, 2018.
2. D. J. Inman, K. K. Reichl and B. C. Essink, “A Metastructure Approach to Damping and Vibration Absorption,” in 17th Asian Pacific Vibration Conference, 2017.
3. M. L. Liu, K. K. Reichl and D. J. Inman, “Complex Modulus Variation by Manipulation of Mechanical Test Method and Print Direction,” in 2017 Society of Engineering Mechanics Annual Conference, 2017.
4. K. K. Reichl and D. J. Inman, “Constant Mass Metastructure with Vibration Absorbers of Linearly Varying Natural Frequencies,” in 35th International Modal Analysis Conference, 2017.
5. K. K. Reichl and D. J. Inman, “Metastructures and Active Vibration Control,” in 27th International Conference on Adaptive Structures Technologies, 2016.
6. K. K. Reichl and D. J. Inman, “Dynamic Modulus Properties of Objet Connex 3D Printer Digital Materials,” in 34th International Modal Analysis Conference, 2016.
7. K. K. Reichl and D. J. Inman, “Finite Element Modeling of Longitudinal Metastructures for Passive Vibration Suppression,” 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2016.
8. K. K. Reichl and D. J. Inman, “Modelling of low-frequency broadband vibration mitigation for a bar experiencing longitudinal vibrations using distributed vibration absorbers,” in 20th International Conference on Composite Materials, 2015.
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