Original scientific paper
https://doi.org/10.13167/2024.30.7
Development of single and multi-coil MR damper subjected to cyclic loading for structural vibration control
Daniel Cruze
; Hindustan Institute of Technology and Science, Department of Civil Engineering, 603103, Chennai, Tamil Nadu, India
*
Nedunchezhian Krishnaraju
; Hindustan Institute of Technology and Science, Department of Civil Engineering, 603103, Chennai, Tamil Nadu, India
Balaji Ramalingam
; Hindustan Institute of Technology and Science, Department of Civil Engineering, 603103, Chennai, Tamil Nadu, India
* Corresponding author.
Abstract
The magnetorheological (MR) damper can dissipate energy from a vibrating system with low power consumption, making it one of the most popular semi-active damping devices. This study compares single- and multi-coil dampers subjected to cyclic loading. A magnetic oil-based MR fluid is synthesized with 50% carbonyl iron and 50 % synthetic oil, resulting in maximum damping force and minimum sedimentation. A three-dimensional model of the MR damper is created using AutoCAD and is fabricated. Single- and multi-coil MR dampers with a 3000 N capacity are designed and fabricated. The MR dampers are experimentally tested in a universal testing machine with a 1000 kN capacity for various input currents from 1 to 3 A. As the current increases, the damping force also increases in both the single- and multi-coil MR dampers. The multi-coil MR damper has a maximum damping force of 2628 N at a 15 mm amplitude, and the single-coil MR damper has a maximum damping force of 1868 N. A numerical simulation of the magnetic properties of the single- and multi-coil MR dampers is conducted using the finite-element method magnetics. A spring is placed at the top of the piston pole and bottom of the piston to make the MR damper semi-active. The fabricated MR damper can be used in seismic-resistant structures and as a base isolator to protect the structure from vibrations. In addition to civil engineering, it can be used in the development of adaptive prosthetics and orthotic devices, providing dynamic support.
Keywords
MR damper; semi-active damper; single coil; multi-coil; MR fluid
Hrčak ID:
322150
URI
Publication date:
6.11.2024.
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