Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
7-2015
Journal or Book Title
Journal of Sound and Vibration
Volume
348
Issue
21
First Page
41
Last Page
56
DOI
10.1016/j.jsv.2015.03.011
Abstract
Supplemental damping can be used as a cost-effective method to reduce structural vibrations. In particular, passive systems are now widely accepted and have numerous applications in the field. However, they are typically tuned to specific excitations and their performances are bandwidth-limited. A solution is to use semi-active devices, which have shown to be capable of substantially enhanced mitigation performance. The authors have recently proposed a new type of semi-active device, which consists of a variable friction mechanism based on a vehicle duo-servo drum brake, a mechanically robust and reliable technology. The theoretical performance of the proposed device has been previously demonstrated via numerical simulations. In this paper, we further the understanding of the device, termed Modified Friction Device (MFD) by fabricating a small scale prototype and characterizing its dynamic behavior. While the dynamics of friction is well understood for automotive braking technology, we investigate for the first time the dynamic behavior of this friction mechanism at low displacements and velocities, in both forward and backward directions, under various hydraulic pressures. A modified 3-stage dynamic model is introduced. A LuGre friction model is used to characterize the friction zone (Stage 1), and two pure stiffness regions to characterize the dynamics of the MFD once the rotation is reversed and the braking shoes are sticking to the drum (Stage 2) and the rapid build up of forces once the shoes are held by the anchor pin (Stage 3). The proposed model is identified experimentally by subjecting the prototype to harmonic excitations. It is found that the proposed model can be used to characterize the dynamics of the MFD, and that the largest fitting error arises at low velocity under low pressure input. The model is then verified by subjecting the MFD to two different earthquake excitations under different pressure inputs. The model is capable of tracking the device׳s response, despite a lower fitting performance under low pressure and small force output, as it was found in the harmonic tests due to the possible nonlinearity in Stage 2 of the model.
Copyright Owner
Elsevier Ltd.
Copyright Date
2015
Language
en
File Format
application/pdf
Recommended Citation
Cao, Liang; Downey, Austin R.J.; Laflamme, Simon; Taylor, Douglas; and Ricles, James, "Variable Friction Device for Structural Control based on Duo-Servo Vehicle Brake: Modeling and Experimental Validation" (2015). Civil, Construction and Environmental Engineering Publications. 75.
https://lib.dr.iastate.edu/ccee_pubs/75
Included in
Civil Engineering Commons, Construction Engineering and Management Commons, Electrical and Electronics Commons, Environmental Engineering Commons, Structural Engineering Commons
Comments
NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Sound and Vibration. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Sound and Vibration, 348(21)July 2015; 41-56. Doi: 10.1016/j.jsv.2015.03.011.