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A Theoretical Study on the Influence of Frequency on the Dynamic Characteristics of Air Film

机译：频率对气膜动态特性影响的理论研究

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A general method is developed to deal with the compressibility of air film and to predict the linear dynamic stiffness and damping coefficients of air-lubricated bearings over the whole range of frequency. Numerical results reveal that both stiffness and damping coefficients are functions of not only the static parameters such as eccentricity and attitude angle, but also the frequency of disturbance. The coefficients are continuous and tend to certain values even when the frequency approaches zero or positive infinity. In general, the direct terms of the dynamic stiffness increase with the increase of the frequency, while the cross-coupling terms tend to an equal value when the frequency becomes infinite, and all the damping coefficients decrease in the higher frequency region and vanish when the frequency approaches positive infinity.
机译：开发了一种通用方法来处理气膜的可压缩性，并预测在整个频率范围内的空气润滑轴承的线性动态刚度和阻尼系数。数值结果表明，刚度和阻尼系数不仅是偏心率和姿态角等静态参数的函数，而且还是扰动频率的函数。这些系数是连续的，即使在频率接近零或正无穷大时，也趋于某些值。一般而言，动刚度的直接项随频率的增加而增加，而当频率变为无限大时，交叉耦合项趋于相等的值，而当频率越高时，所有阻尼系数都减小，而消失。频率接近正无穷大。

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