繊維強化プラスチック材料の振動減衰同定に及ぼす大気圧の影響(機械力学,計測,自動制御)

概要

論文の詳細を見る
An effect of the air on the material damping of fiber reinforced plastics has been investigated. As the most of vibration tests are carried out in the atmosphere, however, the material damping has not been evaluated with accuracy. The vibration tests of CFRP plates have been carried out in the atmospheric pressure and in the low-pressure conditions, respectively. Comparing the both of experimental results, the effects of an atmosphere on the natural frequency and damping have been discussed. From these experimental results, it is revealed that the aerodynamic force has a great influence on the damping ratio and the test at below 10^3 Pa needs to obtain the real damping ratio. On the other hand, there is little effect of the air on the natural frequency. The damping parameters of CFRP are also identified by the experimental result. These results show that it is important to take the effect of thc air on the damping into consideration.
一般社団法人日本機械学会の論文
2005-02-25