国外文献 > 1.轴承 > 1. 基础理论与机制 > 动力学与稳定性
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| 标 题： |
A direct numerical approach to compute the nonlinear rotordynamic coefficient of the noncircular gas journal bearing
直接数值方法计算非圆形气体轴向轴承的非线性转子动力学系数 |
| 作 者： |
Yadav, Saurabh Kumar
Rajput, Arvind Kumar
Ram, Nathi
Sharma, Satish C. |
| 关键词： |
Gas journal bearing [气体滚动轴承]
nonlinear finite element method [ 非线性有限元方法]
rotor dynamics [ 转子动力学]
nonlinear dynamic coefficients [ 非线性动态系数] |
| 出版年： |
2018 |
| 期刊名： |
Proceedings of the Institution of Mechanical Engineers, Part J. Journal of engineering tribology
机械工程师学会会刊，J部分。工程摩擦学杂志 |
| 年卷期： |
2018, vol.232, no.4 |
| 摘 要： |
Gas bearings are extensively used in several industrial applications to support the rotating load at high speed due to its favorable characteristics. The numerical computation of the gas film damping and stiffness coefficients is a difficult task due to nonlinearity in the Reynolds equation for compressible lubricant. In the present work, a numerical method based on the finite element method is developed for the direct computation of gas film damping and stiffness coefficients. In this method, a double partial differential equation approach has been used to compute the dynamic characteristics. Further, the numerical results presented shows that the bearing ellipticity ratio significantly affects the nonlinear trajectory of the journal.
由于其优越的特性，气体轴承被广泛应用于多种工业领域，用于高速下支撑旋转载荷。然而，由于可压缩润滑剂的雷诺方程具有非线性特征，气体膜阻尼和刚度系数的数值计算是一项困难的任务。在本研究中，提出了一种基于有限元法的数值方法，用于直接计算气体膜的阻尼和刚度系数。该方法采用双偏微分方程法来求解动态特性。进一步的数值结果表明，轴承的椭圆率对轴颈的非线性轨迹有显著影响。 |
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