The normal operation of a rotor system is generally vulnerable to misalignment between gas foil bearing (GFB) and rotor. However, most theoretical and experimental researches about the characteristics of GFBs have ignored this phenomenon. Therefore, the main purpose of this paper is to evaluate the static and dynamic performance of GFBs considering misalignment.,The shaft is allowed to misalign in two directions. Then the variations of bearing load, friction force, restoring moment, stiffness and damping coefficients are thoroughly explored. The hydrodynamic pressure on the gas film is modeled with compressible Reynolds equation, and the deformation of the flexible bearing is calculated with finite element method. Small perturbation method is used to obtain the displacement and moment dynamic coefficients.,The film thickness and pressure distribution distort when misalignments appear. The inclination of GFBs can enhance the restoring moment to withstand the imposed misalignment. Furthermore, the simulation phenomenon demonstrates the misalignment around load direction should be avoided as much as possible, while a small value misalignment around another direction is allowed.,The value of this paper is the exploration of the influence of misalignments on the static and dynamic performance of the Generation II journal GFB.,The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-10-2019-0418/

中文翻译：

---

带不对中的第二代轴颈气箔轴承的性能

转子系统的正常运行通常容易受到气体箔轴承 (GFB) 和转子之间未对准的影响。然而，大多数关于 GFBs 特性的理论和实验研究都忽略了这一现象。因此，本文的主要目的是评估考虑不对中的 GFB 的静态和动态性能。允许轴在两个方向上不对中。然后深入探讨了轴承载荷、摩擦力、恢复力矩、刚度和阻尼系数的变化。气膜上的流体动压采用可压缩雷诺方程建模，柔性轴承的变形采用有限元法计算。使用小扰动法获得位移和力矩动态系数。，当出现未对准时，薄膜厚度和压力分布会扭曲。GFB 的倾斜可以增强恢复力矩以承受强加的不对中。此外，仿真现象表明应尽可能避免围绕载荷方向的错位，同时允许围绕另一方向的小值错位。本文的价值在于探索错位对静动态性能的影响第二代期刊GFB。这篇文章的同行评审历史可在：https://publons.com/publon/10.1108/ILT-10-2019-0418/