A novel semi-active TMD with folding variable stiffness spring
An innovative variable stiffness device is proposed and investigated based on numerical simulations. The device, called a folding variable stiffness spring (FVSS), can be widely used, especially in tuned mass dampers (TMDs) with adaptive stiffness. An important characteristic of FVSS is its capabili...
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| Format: | Article |
| Language: | English |
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Institute of Engineering Mechanics, China Earthquake Administration
2016
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| Online Access: | http://hdl.handle.net/1721.1/104008 https://orcid.org/0000-0001-7494-3050 |
| _version_ | 1811070351127347200 |
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| author | Rahimian, M. Rafieipour, M. H. Ghorbani-Tanha, A. K. Mohammadi-Ghazi, Reza |
| author2 | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Rahimian, M. Rafieipour, M. H. Ghorbani-Tanha, A. K. Mohammadi-Ghazi, Reza |
| author_sort | Rahimian, M. |
| collection | MIT |
| description | An innovative variable stiffness device is proposed and investigated based on numerical simulations. The device, called a folding variable stiffness spring (FVSS), can be widely used, especially in tuned mass dampers (TMDs) with adaptive stiffness. An important characteristic of FVSS is its capability to change the stiffness between lower and upper bounds through a small change of distance between its supports. This special feature results in lower time-lag errors and readjustment in shorter time intervals. The governing equations of the device are derived and simplified for a symmetrical FVSS with similar elements. This device is then used to control a single-degree-of-freedom (SDOF) structure as well as a multi-degree-of-freedom (MDOF) structure via a semi-active TMD. Numerical simulations are conducted to compare several control cases for these structures. To make it more realistic, a real direct current motor with its own limitations is simulated in addition to an ideal control case with no limitations and both the results are compared. It is shown that the proposed device can be effectively used to suppress undesirable vibrations of a structure and considerably improves the performance of the controller compared to a passive device. |
| first_indexed | 2024-09-23T08:34:34Z |
| format | Article |
| id | mit-1721.1/104008 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:34:34Z |
| publishDate | 2016 |
| publisher | Institute of Engineering Mechanics, China Earthquake Administration |
| record_format | dspace |
| spelling | mit-1721.1/1040082022-09-23T13:01:22Z A novel semi-active TMD with folding variable stiffness spring Rahimian, M. Rafieipour, M. H. Ghorbani-Tanha, A. K. Mohammadi-Ghazi, Reza Massachusetts Institute of Technology. Department of Civil and Environmental Engineering Mohammadi-Ghazi, Reza An innovative variable stiffness device is proposed and investigated based on numerical simulations. The device, called a folding variable stiffness spring (FVSS), can be widely used, especially in tuned mass dampers (TMDs) with adaptive stiffness. An important characteristic of FVSS is its capability to change the stiffness between lower and upper bounds through a small change of distance between its supports. This special feature results in lower time-lag errors and readjustment in shorter time intervals. The governing equations of the device are derived and simplified for a symmetrical FVSS with similar elements. This device is then used to control a single-degree-of-freedom (SDOF) structure as well as a multi-degree-of-freedom (MDOF) structure via a semi-active TMD. Numerical simulations are conducted to compare several control cases for these structures. To make it more realistic, a real direct current motor with its own limitations is simulated in addition to an ideal control case with no limitations and both the results are compared. It is shown that the proposed device can be effectively used to suppress undesirable vibrations of a structure and considerably improves the performance of the controller compared to a passive device. 2016-08-25T22:41:00Z 2016-08-25T22:41:00Z 2014-09 2016-08-18T15:47:47Z Article http://purl.org/eprint/type/JournalArticle 1671-3664 1993-503X http://hdl.handle.net/1721.1/104008 Rafieipour, M. H., A. K. Ghorbani-Tanha, M. Rahimian, and R. Mohammadi-Ghazi. “A Novel Semi-Active TMD with Folding Variable Stiffness Spring.” Earthq. Eng. Eng. Vib. 13, no. 3 (September 2014): 509–518. https://orcid.org/0000-0001-7494-3050 en http://dx.doi.org/10.1007/s11803-014-0258-5 Earthquake Engineering and Engineering Vibration Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. Institute of Engineering Mechanics, China Earthquake Administration and Springer-Verlag Berlin Heidelberg application/pdf Institute of Engineering Mechanics, China Earthquake Administration Institute of Engineering Mechanics, China Earthquake Administration |
| spellingShingle | Rahimian, M. Rafieipour, M. H. Ghorbani-Tanha, A. K. Mohammadi-Ghazi, Reza A novel semi-active TMD with folding variable stiffness spring |
| title | A novel semi-active TMD with folding variable stiffness spring |
| title_full | A novel semi-active TMD with folding variable stiffness spring |
| title_fullStr | A novel semi-active TMD with folding variable stiffness spring |
| title_full_unstemmed | A novel semi-active TMD with folding variable stiffness spring |
| title_short | A novel semi-active TMD with folding variable stiffness spring |
| title_sort | novel semi active tmd with folding variable stiffness spring |
| url | http://hdl.handle.net/1721.1/104008 https://orcid.org/0000-0001-7494-3050 |
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