国外文献 > 1.轴承 > 4. 设计与分析 > 数值方法
关键词搜索：
| 标 题： |
A Finite Element Model for Static Performance Analysis of Gas Foil Bearings Based on Frictional Contacts
基于摩擦接触的气体箔轴承静力性能分析有限元模型 |
| 作 者： |
Zhao, Xuewei
Xiao, Shuhong |
| 关键词： |
Foil bearings [箔片轴承]
finite element [ 有限元法]
contact mechanics [ 接触力学]
friction [ 摩擦] |
| 出版年： |
2021 |
| 期刊名： |
Tribology Transactions
摩擦学 Transactions |
| 年卷期： |
2021, vol.64, no.2 |
| 摘 要： |
In gas foil bearings, frictional contacts are one of the main factors that affect bearing performance, which is highly nonlinear. Using a finite element method, this article presents a nonlinear model for static performance analysis of foil bearings based on frictional contacts. The model incorporates the top foil and the interactions between bumps by modeling the foil structure with beam elements. The penalty method and the node-to-segment contact scheme are utilized to model the contacts of the structure. The stick-slip motions of the contact nodes are considered. Because the contact behavior is path dependent when the friction is taken into account, a step-by-step incremental iterative method is used for solution, in which the calculation at the present step is based on the results from the previous step. An algorithm is designed to determine the contact states, and the calculation at the next incremental step will not be performed until all contact states meet the check conditions in the present step. To couple the structure domain with the fluid film, each iterative step of the pressure calculation using the finite difference method is regard as an incremental step. This model is validated by comparisons with published results. Using this model, hysteretic behavior caused by friction and dissipative properties of the foil structure are analyzed under static condition.
在气体箔片轴承中，摩擦接触是影响轴承性能的主要因素之一，且其性能具有高度非线性特征。本文基于摩擦接触，采用有限元方法建立了一种箔片轴承静力性能分析的非线性模型。该模型通过梁元对箔片结构进行建模，考虑了上层箔片及凸起之间的相互作用。利用罚函数法和节点到段接触方案来模拟结构接触行为，并考虑了接触节点的粘滑运动。由于在考虑摩擦时，接触行为具有路径依赖性，因此采用逐步增量迭代法求解，当前步骤的计算基于前一步的结果。设计了一个算法以确定接触状态，只有当所有接触状态满足当前步骤中的检查条件后，才会进行下一步的计算。为将结构域与流体膜耦合，使用有限差分法进行压力计算的每个迭代步骤均视为一个增量步长。该模型通过与已发表结果的对比得到验证。利用该模型，分析了箔片结构在静止条件下由摩擦和耗散特性引起的滞后行为。 |
| 中文内容为网络AI翻译，专业术语未必准确，仅供参考。 |
京公网安备 11010202009788