Damping Properties of Magnetic-Vibration-Damper

• Published in: The Journal of the INCE of Japan Vol. 21; no. 4; pp. 273 - 281
• Main Authors: Hansaka, Masanori, Mifune, Naoto, Miura, Atushi, Satou, Hitoshi
• Format: Journal Article
• Language: English; Japanese
• Published: The Institutew of Noise Control Engineering of Japan 01.08.1997
• Subjects: Butylrubber; Damper; Magnetism; Railway
• ISSN: 0386-8761; 1883-7506
• DOI: 10.11372/souonseigyo1977.21.273

To improve effective vibration damper, we have developed a new type damper, Magnetic-Vibration-Damper (MVD). By applying magnetism, MVD doesn't have only good workability but also enhanced damping abilities. As the result of examinations of thickness of constraining layer (TC) and thickness of damping layer (TD) dependencies, the following properties of MVD have been revealed. (1) The damping performance of MVD has a peak value againstTC, and the suitable value of TCincreases in proportion to thickness of vibrating body (TB). (2) The damping performance of MVD increases with the increase of TD in small range of TD, and gradually converges to a value. The values of TD where the damping performance of MVD converges are almost constant against TB. (3) Sample mass effect on constraining type vibration damper has been revealed to be very small. (4) It is found out that only in small range of TD less than 3mm sample mass effect becomes effective. Other than sample mass, flexural rigidity of constraining layer is as influential in frictional loss as in internal loss.