Abstract
new type of semi-active TLCD called MF-TLCD is designed. In this device, A magnetic fluid is used as a working fluid of TLCD, and vibration characteristics of fluids column can be controlled. In this study, the frequency responses of structure and magnetic fluid column are measured and the influence of magnetic field on the natural frequency of magnetic fluid column is researched. When double electromagnets are used, the natural frequency change is larger than the case of single electromagnet, and also, the position of electromagnets h that natural frequency changes from increase to decrease decided about one point.
