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首页> 外文会议>American Society of Mechanical Engineers(ASME)/Society of Tribologists and Lubrication Engineers(STLE) International Joint Tribology Conference 2004(IJTC 2004) vol.1 pt.A; 20041024-27; Long Beach,CA(US) >MODAL AND NODAL EHD ANALYSIS FOR GAS JOURNAL BEARINGS
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MODAL AND NODAL EHD ANALYSIS FOR GAS JOURNAL BEARINGS

机译：天然气期刊轴承的模态和节点EHD分析

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摘要

This paper presents a novel finite element elastohydrodynamic lubrication analysis appropriate for gas journal bearings under dynamic conditions. The method employs gas pressure as a state variable, and structural sleeve deformation is represented by a linear combination of preselected mode shapes obtained from a related eigenvalue problem. The method takes into account temporal variation of journal position and velocity, and second-order slip flow boundary effects are included at no additional computational cost. The formulation is subsequently applied to a particular example (flexible large-aspect ratio, high-speed, MEMS-scale journal microbearing), where it is shown that a judicious choice of structural sleeve elasticity can significantly improve bearing performance (as measured by pressure distribution and load capacity) when compared with results obtained using rigid bearing surfaces.
机译：本文提出了一种新颖的有限元弹性流体动力润滑分析方法，适用于动态条件下的气体轴颈轴承。该方法采用气压作为状态变量，结构套筒变形由从相关特征值问题获得的预选模态形状的线性组合表示。该方法考虑了轴颈位置和速度的时间变化，并且无需额外的计算成本即可包含二阶滑流边界效应。随后将该配方应用于一个特定示例（柔性大纵横比，高速，MEMS尺寸的轴颈微轴承），该示例表明，明智地选择结构套筒弹性可以显着改善轴承性能（通过压力分布来衡量）与承载能力相比）。

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