面粗さに関して平均化されたボルツマン修正レイノルズ方程式の直接法による過渡応答解析

概要

論文の詳細を見る
To obtain dynamic characteristics of compressible lubricating films incurring surface roughness effects under rarefaction conditions, a numerical calculation methodology applying the ADI scheme is derived for the solution to the averaged Reynolds equation involving flow factors resulting from Boltzmann molecular free flow. This methodology features the transformation of the dependent variable in the Reynolds equation from pressure to the product of averaged pressure by averaged spacing, and the determination of the flow factor using averaged spacing. Applying this method to a head slider in practical use, transient responses made when flying over a bump and incurring surface roughness effects are compared for three roughness pattern cases. It is found that longitudinal roughness effects in the transient response appear in terms of decrease both in the natural frequency and in the damping speed. On the contrary, moving transverse roughness affects the response inversely and stationary transverse roughness effects it only slightly.
1994-01-25