627 Fluggeの殻理論による軸方向すきま流れを受ける固定-自由支持薄肉円筒殻の動的安定性(OS-4 流体関連振動,研究発表講演)

概要

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When thin cylindrical shells having freely supported end as labyrinth air seals and thermal shielding annular structures in large diameter piping are subjected to axial annular flows, an unstable vibration is apt to be occurred. The unstable vibration of thin cylindrical shells is investigated considering the fluid structure interaction between shells and flowing fluids. The coupled equation between shells and fluids is derived using the Flugge's shell theory and the Navier-Stokes equation. The unstable phenomenon is clarified by root locus based on the complex eigenvalue analysis. The influence of shell-dimensions on the threshold of the instability of the coupled vibration shells and flowing fluids is investigated. Especially, in this paper, the analysis is carried out by using two types of shell that have different length and water as a fluid.
社団法人日本機械学会の論文
2005-03-18