抄録
A TMFD (Tuned Magnetic Fluid Damper) is a dynamic absorber using a magnetic fluid. The TMFD dampens oscillations of structures around natural frequency of the TMFD. A magnetic field of vertical direction changes natural frequency of the TMFD. Thus the TMFD dampens oscillations effectively in wide frequency area by using magnetic field. The natural frequency of the TMFD with a coaxial cylindrical container changes lower than that with a cylindrical container. However, it is found that an iron core in a central hole of the coaxial cylindrical container improves the change of the natural frequency. The effect of the core is studied experimentally.
