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Abstract
A magnetic fluid is a smart, colloidal, and strongly magnetizable fluid, and is composed of a base liquid, ferromagnetic particles, and a chemically adsorbed surfactant. A tuned liquid column damper (TLCD) —devised for vibration mitigation of high structures— is a passive damper categorized as a dynamic absorber. Using a magnetic fluid as the working fluid of a TLCD can improve and change the TLCD into a novel semiactive damper. The natural frequency of a TLCD with a magnetic fluid can be changed via a magnetic field. This novel damper can be used as an effective vibration suppression mechanism for building structures. In this study, we investigate the effect of the magnetic field on the natural frequency of a TLCD with a magnetic fluid. In addition, using the experimental results, we demonstrate the relationship between the setting positions of an electromagnet, the strength of the magnetic field, and the changes in the natural frequency.
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