A FEM based modeling method for analyzing the static performance of aerostatic thrust bearings considering the fluid-structure interaction. (April 2021)

• Record Type: Journal Article
• Authors: Gao, Qiang; Qi, Lizi; Gao, Siyu; Lu, Lihua; Song, Laiyun; Zhang, Feihu
• Is Part Of: Tribology international. Volume 156(2021)
• Publication Date: 2021-04
• Subjects: Aerostatic bearing -- Static performance -- Fluid-structure interaction -- FEM; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2020.106849
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract : The fluid-structure interaction (FSI) phenomenon has significant impact on the performance of aerostatic thrust bearings. To rapidly calculate their performance, this paper proposes a finite element method (FEM) based FSI modeling method. A FEM model of aerostatic bearing and a two dimensional FEM model of thrust plate were built, and the bidirectional data exchange between them was realized. Besides, the change of discharge coefficient caused by FSI phenomenon is considered by adopting a discharge coefficient model. The accuracy of the proposed FSI model is verified numerically and experimentally. The average calculation time is reduced from 9.36 h to 86.2 s for the case study. This research provides an efficient modeling method for the design of aerostatic thrust bearing considering FSI. Highlights: A FEM based modeling method is proposed to calculate the performance of aerostatic thrust bearing considering FSI effect. The bidirectional data exchange between the aerostatic thrust bearing and the thrust plate is realized. The variation of the discharge coefficient caused by the FSI phenomenon is taken into consideration in the proposed FSI model. The accuracy of proposed modeling method is verified numerically and experimentally. Comparing with our pervious proposed FSI model, the calculation time is reduced dramatically by the new proposed FSI model.