The stiffness and dampness parameters of journal bearings are required in rectangular coordinates for analyzing the stability boundary and threshold speed of oil film bearings. On solving the Reynolds equation, the oil film force is always obtained in polar coordinates; thus, the stiffness and dampness parameters can be easily obtained in polar coordinates. Therefore, the transformation between the polar and rectangular coordinates of journal bearing stiffness and dampness parameters is discussed in this study.

中文翻译：

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流体动压滑动轴承刚度和阻尼参数的极坐标和直角坐标之间的转换

直角坐标需要轴颈轴承的刚度和阻尼参数来分析油膜轴承的稳定性边界和阈值速度。在求解雷诺方程时，总是在极坐标中获得油膜力。因此，可以容易地在极坐标中获得刚度和阻尼参数。因此，本研究讨论了轴颈轴承刚度和阻尼参数的极坐标和直角坐标之间的转换。