An experimental and theoretical analysis of a foil-air bearing rotor system
An experimental and theoretical analysis of a foil-air bearing rotor system
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DOI：
10.1016/j.jsv.2017.10.036
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发表时间：
2018-01-20
影响因子：
4.7
通讯作者：
Bin Hassan, M. F.
中科院分区：
文献类型：
--
作者：
Bonello, P.;Bin Hassan, M. F.
虽然有相当多的研究箔片空气轴承（FAB）转子系统的实验测试，只有一小部分已与模拟从一个完整的非线性模型，链接转子，气膜和箔域，由于建模的复杂性和计算负担。第一作者提出并由独立研究人员采用的一种方法，将三个域作为一个耦合动力系统同时求解，最近证明了它解决这个问题的能力。本文使用这种方法，进一步的发展，在实验和理论研究的FAB转子试验台。详细介绍了试验台，包括其调试问题。理论分析使用了最近推出的基于模态的凹凸箔模型，该模型考虑了凹凸和它们的惯性之间的相互作用。对空气膜的压力约束的实施被发现延迟的不稳定速度的预测发病。结果借给实验验证最近的理论为基础的索赔，Gumbel条件可能不适合一个实际的单垫FAB。令人满意的预测的显着特征的测量的非线性行为表明，空气膜确实是非常有影响力的响应，与早期的发现。(C)2017爱思唯尔有限公司版权所有
Although there is considerable research on the experimental testing of foil-air bearing (FAB) rotor systems, only a small fraction has been correlated with simulations from a full nonlinear model that links the rotor, air film and foil domains, due to modelling complexity and computational burden. An approach for the simultaneous solution of the three domains as a coupled dynamical system, introduced by the first author and adopted by independent researchers, has recently demonstrated its capability to address this problem. This paper uses this approach, with further developments, in an experimental and theoretical study of a FAB-rotor test rig. The test rig is described in detail, including issues with its commissioning. The theoretical analysis uses a recently introduced modal-based bump foil model that accounts for interaction between the bumps and their inertia. The imposition of pressure constraints on the air film is found to delay the predicted onset of instability speed. The results lend experimental validation to a recent theoretically-based claim that the Gumbel condition may not be appropriate for a practical single-pad FAB. The satisfactory prediction of the salient features of the measured nonlinear behavior shows that the air film is indeed highly influential on the response, in contrast to an earlier finding. (C) 2017 Elsevier Ltd. All rights reserved.