多重回転弾性ディスクに発生する流れ励起不安定振動の理論解析モデルの構築と安定性解析(機械力学,計測,自動制御)

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This paper deals with a theoretical modeling and stability analysis of multiple flexible disks rotating in a confined fluid. In the stability analysis, the basic equations of the fluid flow around the rotating disks are based on Navier-Stokes equations and the structural vibration equations of the rotating multiple flexible disks are based on the Kirchhoff-Love's thin-plate model. These equations of the fluid-structure coupling motion are linearized around the equilibrium state. The variations of the modal frequencies and the modal damping ratios of the system are calculated as a function of the disk rotational speed. And the effect of the number of the disks on the critical speed is examined. As a result, the analytical results show a good agreement with the experimental results, and clarifies the effect of the number of the disks on the stability and the characteristics of the unstable vibration.
社団法人日本機械学会の論文
2002-03-25