ランダムな流体力を受ける磁気ディスク浮動ヘッドの動的安定問題の解析

概要

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The present paper shows an analysis for stability and dynamic responses of a rarefied gas lubricated slider bearing on a magnetic recording disk. Knudsen number of the air film under the head slider is close to 1/5, i. e. , the limit of continuum, so a modified Reynolds equation is adopted for this problem. The other, more crucial problem is stability of the head accelerated by air lift which is rather random due to up-down motion of the rotating disk. The problem is reduced to a coupling problem of the vibrating system subjected to random fluid pressure. FEM and FDM are adopted for the modified Reynolds equation and the method of Duhamel integral is applied to equations of motion. The result shows the adequacy of the computation and the method. Results of analysis for random acceleration are shown by dynamic response diagrams of the head slider and power spectra of the response.
一般社団法人日本機械学会の論文
1995-06-25