Additional Damping Effects of Damping Sheets Patch on a Cantilever Steel Plate

This study aims to apply the damping rubber sheet to vibration control of the member of a transmission tower. This Paper reports the basic damping properties of the rubber sheet patch which contributes to the vibration control　of a steel plate which vibrates in a low frequency range. Our experimental results indicated that the rubber sheet patch which is attached on the steel plate using only glue was not effective for vibration control. However it was　found that the rubber sheet which was attached on the plate using glue became very effective for low－frequency vibration by binding using other small steel plates. Finally, it was found that the damping rubber sheet has possibility to be useful as a damping device for the member vibration of a transmission tower

ラチス構造物に取り付けた付加振動体の強風下での制振性能に関する基礎的研究

It is well known that the passive type damper like a Tuned Mass Damper(TMD) is useful for the vibration control of a tall structure under strong winds. In general a damper device is not exposed to wind. However installation of an additional vibrator to a lattice structure like a transmission tower requires the information of damping performance of the vibrator subjected to gusty winds. The paper reports the damping performance of the additional vibrator under several conditions of the structural and gust property. Our parametric studies indicate that the performance of vibration control under gusty winds is adjustable by the optimized frequency ratio and damping ratio of the additional vibrator too. And it was found that the performance is affected by both the vibrator's size and the wind property