Generating uniaxial vibration with an electrodynamic shaker and external air bearing
Electrodynamic shakers are widely used in experimental investigations of vibrated fluids and granular materials. However, they are plagued by undesirable internal resonances that can significantly impact the quality of vibration. In this work, we measure the performance of a typical shaker and chara...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
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Elsevier
2017
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| Online Access: | http://hdl.handle.net/1721.1/108268 https://orcid.org/0000-0002-7936-7256 |
| _version_ | 1826202511183183872 |
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| author | Harris, Daniel Martin Bush, John W. M. |
| author2 | Massachusetts Institute of Technology. Department of Mathematics |
| author_facet | Massachusetts Institute of Technology. Department of Mathematics Harris, Daniel Martin Bush, John W. M. |
| author_sort | Harris, Daniel Martin |
| collection | MIT |
| description | Electrodynamic shakers are widely used in experimental investigations of vibrated fluids and granular materials. However, they are plagued by undesirable internal resonances that can significantly impact the quality of vibration. In this work, we measure the performance of a typical shaker and characterize the influence that a payload has on its performance. We present the details of an improved vibration system based on a concept developed by Goldman (2002) which consists of a typical electrodynamic shaker with an external linear air bearing to more effectively constrain the vibration to a single axis. The principal components and design criteria for such a system are discussed. Measurements characterizing the performance of the system demonstrate considerable improvement over the unmodified test shaker. In particular, the maximum inhomogeneity of the vertical vibration amplitude is reduced from approximately 10 percent to 0.1 percent; moreover, transverse vibrations were effectively eliminated. |
| first_indexed | 2024-09-23T12:08:39Z |
| format | Article |
| id | mit-1721.1/108268 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T12:08:39Z |
| publishDate | 2017 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/1082682022-09-28T00:29:55Z Generating uniaxial vibration with an electrodynamic shaker and external air bearing Harris, Daniel Martin Bush, John W. M. Massachusetts Institute of Technology. Department of Mathematics Bush, John Harris, Daniel Martin Bush, John W. M. Electrodynamic shakers are widely used in experimental investigations of vibrated fluids and granular materials. However, they are plagued by undesirable internal resonances that can significantly impact the quality of vibration. In this work, we measure the performance of a typical shaker and characterize the influence that a payload has on its performance. We present the details of an improved vibration system based on a concept developed by Goldman (2002) which consists of a typical electrodynamic shaker with an external linear air bearing to more effectively constrain the vibration to a single axis. The principal components and design criteria for such a system are discussed. Measurements characterizing the performance of the system demonstrate considerable improvement over the unmodified test shaker. In particular, the maximum inhomogeneity of the vertical vibration amplitude is reduced from approximately 10 percent to 0.1 percent; moreover, transverse vibrations were effectively eliminated. National Science Foundation (U.S.) (CBET-0966452) National Science Foundation (U.S.) (CMMI-1333242) National Science Foundation (U.S.). Graduate Research Fellowship Program 2017-04-19T19:10:00Z 2017-04-19T19:10:00Z 2014-10 2014-09 Article http://purl.org/eprint/type/JournalArticle 0022-460X 1095-8568 http://hdl.handle.net/1721.1/108268 Harris, Daniel M., and John W.M. Bush. “Generating Uniaxial Vibration with an Electrodynamic Shaker and External Air Bearing.” Journal of Sound and Vibration 334 (2015): 255–269. https://orcid.org/0000-0002-7936-7256 en_US http://dx.doi.org/10.1016/j.jsv.2014.09.015 Journal of Sound and Vibration Creative Commons Attribution-NonCommercial-NoDerivs License http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Elsevier Prof. Bush via Michael Noga |
| spellingShingle | Harris, Daniel Martin Bush, John W. M. Generating uniaxial vibration with an electrodynamic shaker and external air bearing |
| title | Generating uniaxial vibration with an electrodynamic shaker and external air bearing |
| title_full | Generating uniaxial vibration with an electrodynamic shaker and external air bearing |
| title_fullStr | Generating uniaxial vibration with an electrodynamic shaker and external air bearing |
| title_full_unstemmed | Generating uniaxial vibration with an electrodynamic shaker and external air bearing |
| title_short | Generating uniaxial vibration with an electrodynamic shaker and external air bearing |
| title_sort | generating uniaxial vibration with an electrodynamic shaker and external air bearing |
| url | http://hdl.handle.net/1721.1/108268 https://orcid.org/0000-0002-7936-7256 |
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