文献类型：期刊文献

英文题名：Thermo-elasto-hydrodynamic analysis of gas foil thrust bearings

作者：Wu, Yang[1];Li, Shuangmin[1];Shao, Congpeng[1];Gao, Lei[1];Guo, Changle[1];An, Qi[1]

机构：[1]East China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：2026

卷号：317

外文期刊名：INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES

收录：;EI(收录号：20261220331038);WOS:【SCI-EXPANDED(收录号:WOS:001729311700001)】；

语种：英文

外文关键词：Gas foil thrust bearing; Thermo-elasto-hydrodynamic; Finite element; Critical rotational speed; Foil thermal deformation

摘要：This paper presents a coupled thermo-elasto-hydrodynamic model for bump-type gas foil thrust bearings (GFTBs). Structural deformation and temperature are calculated using the finite element method within a consistent mesh framework. The gas film pressure is solved using the Reynolds equation on a two-dimensional mesh, and the temperature field is obtained from the energy equation on a three-dimensional mesh. In addition, the thermal deformations of the structures are discussed in detail. Unlike existing studies that simplify the bump foil as a thermal resistance model, the top and bump foils are modeled using shell elements, and heat transfer across foil thickness is considered. Frictional contact behavior is applied to not only calculate mechanical deformation but also determine the contact thermal resistance. The computational efficiency of the model was enhanced using techniques such as freedom condensation. The results confirmed that the bump arches near the fixed end experienced substantial thermal deformation. This results in low-thickness regions in the gas film, which affect the load capacity of GFTBs and trigger a lower critical speed. Further research confirmed that, in larger bearings, the load capacity decreased sharply on reaching the critical state because of the more severe foil thermal deformation. Introducing a cooling flow between the top foil and base plate and reducing the radial dimensions of bump strips are effective measures for mitigating the thermal deformation of the foils.