多孔質環状スラスト静圧気体軸受の動特性と最適設計に関する研究 : 表面目づまりのオリフィス絞り効果と多孔質材内の抵抗を考慮した解析

概要

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We numerically analyzed dynamic characteristics of an aerostatic annular porous thrust bearing model which has a thin choked porous surface. It is found that the choked surface causes such important and indispensable effects that can increase stiffness and shift the positive extreme values of damping from the high-frequency region to a lower frequency region, reducing negative damping in the low-frequency region. Under the conditions of allowable static stiffness and the minimum dynamic stiffness, we obtained the unique relationships between design parameters and squeeze number that provide the maximum damping ratio. Considering the mass parameter of a supported body, we propose an optimal design method to maximize damping ratio at natural frequency while maintaining stiffness in the low-frequency region.
社団法人日本機械学会の論文
1995-04-25