Modeling and stability characteristics of bump-type gas foil bearing rotor systems considering stick–slip friction

IF 9.4 1区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Mechanical Sciences Pub Date : 2022-04-01 DOI:10.1016/j.ijmecsci.2022.107091

Runeng Zhou , Yongpeng Gu , Gexue Ren , Suyuan Yu

{"title":"Modeling and stability characteristics of bump-type gas foil bearing rotor systems considering stick–slip friction","authors":"Runeng Zhou , Yongpeng Gu , Gexue Ren , Suyuan Yu","doi":"10.1016/j.ijmecsci.2022.107091","DOIUrl":null,"url":null,"abstract":"<div>Frictional energy dissipation inside the foil structure is considered as a key factor in improving the stability of the gas foil bearing (GFB) rotor system. However, the effect and mechanism of friction on the stability of bump-type GFB rotor systems have remained partially addressed. This study aims to develop a novel comprehensive model to investigate the stability and frictional dissipation mechanism of the GFB rotor system. The LuGre dynamic friction model is adopted to capture accurate stick–slip states. The model order reduction technique and simultaneous solution framework are applied to improve the computational efficiency. The effect of friction on linear and nonlinear stability is investigated based on the proposed model, and an analysis of frictional dissipation is performed to explain the mechanism. The results reveal that the dissipation capacity of the foil structure is directly governed by the stick–slip states that are affected by the friction coefficient and disturbance magnitude, so the optimal friction coefficient for nonlinear stability is higher than the one for linear stability of the GFB rotor system. A further comparison between different friction models greatly highlights the necessity of the ability of the friction model to capture accurate stick–slip states.</div>","PeriodicalId":56287,"journal":{"name":"International Journal of Mechanical Sciences","volume":"219 ","pages":"Article 107091"},"PeriodicalIF":9.4000,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"14","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Mechanical Sciences","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0020740322000285","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 14

Abstract

Frictional energy dissipation inside the foil structure is considered as a key factor in improving the stability of the gas foil bearing (GFB) rotor system. However, the effect and mechanism of friction on the stability of bump-type GFB rotor systems have remained partially addressed. This study aims to develop a novel comprehensive model to investigate the stability and frictional dissipation mechanism of the GFB rotor system. The LuGre dynamic friction model is adopted to capture accurate stick–slip states. The model order reduction technique and simultaneous solution framework are applied to improve the computational efficiency. The effect of friction on linear and nonlinear stability is investigated based on the proposed model, and an analysis of frictional dissipation is performed to explain the mechanism. The results reveal that the dissipation capacity of the foil structure is directly governed by the stick–slip states that are affected by the friction coefficient and disturbance magnitude, so the optimal friction coefficient for nonlinear stability is higher than the one for linear stability of the GFB rotor system. A further comparison between different friction models greatly highlights the necessity of the ability of the friction model to capture accurate stick–slip states.

Abstract Image

查看原文本刊更多论文

考虑粘滑摩擦的碰撞型气箔轴承转子系统建模及稳定性特性

翼型结构内部的摩擦能量耗散被认为是提高气体翼型轴承转子系统稳定性的关键因素。然而，摩擦对碰撞式GFB转子系统稳定性的影响及其机理仍有部分研究。本研究旨在建立一个新的综合模型来研究GFB转子系统的稳定性和摩擦耗散机理。采用LuGre动态摩擦模型准确捕捉粘滑状态。采用模型降阶技术和并行求解框架，提高了计算效率。在此基础上研究了摩擦对线性和非线性稳定性的影响，并对摩擦耗散进行了分析以解释其机理。结果表明:箔片结构的粘滑状态直接决定了其耗散能力，而粘滑状态又受摩擦系数和扰动大小的影响，因此GFB转子系统非线性稳定的最优摩擦系数高于线性稳定的最优摩擦系数。不同摩擦模型之间的进一步比较极大地强调了摩擦模型能够准确捕获粘滑状态的必要性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

International Journal of Mechanical Sciences 工程技术-工程：机械

CiteScore

12.80

自引率

17.80%

发文量

769

审稿时长

19 days

期刊介绍： The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering. The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture). Additionally, IJMS covers the realms of fluid mechanics (both external and internal flows), tribology, thermodynamics, and materials processing. These subjects collectively form the core of the journal's content. In summary, IJMS provides a prestigious platform for researchers to present their original contributions, shedding light on analytical and computational modeling methods in various areas of mechanical engineering, as well as exploring the behavior and application of advanced materials, fluid mechanics, thermodynamics, and materials processing.