Skip to Main Content
 

Global Search Box

 
 
 

ETD Abstract Container

Abstract Header

Numerical and Experimental Analyses of Actively Controlled Pendulum Tuned Mass Damper

Juma, Hameed W.
http://orcid.org/0000-0002-8767-757X
http://rave.ohiolink.edu/etdc/view?acc_num=dayton1544528950528469

Abstract Details

2018, Doctor of Philosophy (Ph.D.), University of Dayton, Mechanical Engineering.
Modern structures such as floor systems, bridges, and high-rise buildings have become lighter in mass and more flexible with negligible damping and thus prone to vibration. Extensive studies have been carried out by various researchers to mitigate the unwanted structural vibration caused by human activities, machinery, and environmental effects (wind and seismic). Various vibration control devices and strategies have been developed and used to abate the unwanted vibration and to increase the serviceability level of such structures. In this research, semi-active control strategies have been developed to a) adjust the tuning frequency and b) introduce damping into an air-suspended pendulum tuned mass dampers (ASTMD). The system is made up of air springs, a proportional valve to control the flow of air in and out of the air springs, and a pendulum. The tuned damping system is designed, built, and evaluated numerically and experimentally. The focus of this work has been the synthesis and analysis of the control algorithms and strategies to vary the tuning accuracy, introduce damping into air suspended ASTMD, and to enable the ASTMD to self-tune itself. The acceleration of the main structure and ASTMD as well as the pressure in the air springs are used as the feedback signals in two different control strategies. The outcome of this research showed that the semi-actively controlled ASTMD dissipates the undesirable vibration, efficiently. This results showed that control strategy 1 (controlling air flow to and from the auxiliary air springs) is more effective than control strategy 2 (controlling air flow to and from the main air spring). The ASTMD’s performance is improved, by feeding back the main structure’s acceleration, in a cascading manner with the above-mentioned semi-active control strategies. Finally, the use of the self-tuning algorithm is shown to be a very effective techniques in improving the performance of the ASTMD. This technique allows that the ASTMD to autonomously re-tune itself and adapt to any change in the natural frequency of the main structure.
Reza Kashani, Ph.D. (Advisor)
Vinod Jain, Ph.D. (Committee Member)
David Myszka , Ph.D. (Committee Member)
Youssef Raffoul, Ph.D. (Committee Member)
118 p.
Mechanical Engineering
Semi active tuned mass damper, structural vibration, Air spring, Pendullum

Recommended Citations

Citations

  • Juma, H. W. (2018). Numerical and Experimental Analyses of Actively Controlled Pendulum Tuned Mass Damper [Doctoral dissertation, University of Dayton]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1544528950528469

    APA Style (7th edition)

  • Juma, Hameed. Numerical and Experimental Analyses of Actively Controlled Pendulum Tuned Mass Damper. 2018. University of Dayton, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=dayton1544528950528469.

    MLA Style (8th edition)

  • Juma, Hameed. "Numerical and Experimental Analyses of Actively Controlled Pendulum Tuned Mass Damper." Doctoral dissertation, University of Dayton, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1544528950528469

    Chicago Manual of Style (17th edition)

dayton1544528950528469
261
© 2018, some rights reserved.Creative Commons License Numerical and Experimental Analyses of Actively Controlled Pendulum Tuned Mass Damper by Hameed W. Juma is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Dayton and OhioLINK.