Abstract
This paper reports the design of a semi-active particle-based damping system in which a dry magnetic particle bed is used to dissipate the energy of a vibrating piston. The system is magnetized by a magnetic field generated by an electromagnetic coil. Hysteresis-free, ferromagnetic materials are selected for both the piston and particles. The damping efficiency increases as the magnetization of the piston and particles increases up to saturation. Semi-active control is achieved by varying the electric current supplied to the coil, which changes the magnetization and allows for real-time tunability of the damping rate. During the process of magnetization and demagnetization, the damping is reversible and temperature-independent over a wide temperature range. This system can be useful in aerospace, automobile and structural engineering applications, particularly in harsh environments.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 182-193 |
| Number of pages | 12 |
| Journal | Journal of Sound and Vibration |
| Volume | 330 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 17 2011 |
Funding
This research was sponsored by the U.S. Air Force Office of Scientific Research (Grant no. FA9550-05-1-0185/P00003 ) and supported by the U.S. National Science Foundation IGERT program on Virtual Tribology at Northwestern University. The authors are grateful Profs. Paul Umbanhowar, John Ketterson, Michael Peshkin, Kornel Ehmann and Arthur Schmidt as well as Dr. Oleksandr Chernyashevskyy and Dr. Aaron Greco for expert advice and helpful discussions.
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Acoustics and Ultrasonics
- Mechanical Engineering