检索结果-南通市图书馆

An efficient three-dimensional foil structure model for bump-type gas foil bearings considering friction

Friction 2021年第6期9卷 1450-1463页

作者： Yongpeng GU Xudong LAN Gexue REN Ming ZHOU School of Aerospace Engineering Tsinghua UniversityBeijing 100084China

This paper presents an efficient three-dimensional(3D)structural model for bump-type gas foil bearings(GFBs)developed by considering *** foil structures are modeled with a 3D shell finite element *** the bump foil mechanical characteristics,the Guyan reduction and component mode synthesis methods are adopted to improve computational efficiency while guaranteeing accurate static responses.A contact model that includes friction and separation behaviors is presented to model the interactions of the bump foil with the top foil and bearing *** proposed structural model was validated with published analytical and experimental *** coupled elastohydrodynamics model of GFBs was established by integration of the proposed structural model with data on hydrodynamic films,and it was validated by comparisons with existing experimental *** performance of a bearing with an angular misalignment was studied numerically,revealing that the reaction torques of the misaligned bearing predicted by GFB models with 2D and 3D foil structure models are quite *** 3D foil structure model should be used to study GFB misalignment.

关键词： gas foil bearing bump foil model frictional contact elastohydrodynamics bearing misalignment

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Fault Characteristics Analysis for Rotor Systems with misalignment Based on Wavelet Packet Decomposition and Frequency-band Energy Ratio Analysis

Fault Characteristics Analysis for Rotor Systems with Misali...

引用

第三十届中国控制会议

作者： ZHANG Shuai~1,QU Yanhuai~1,HAN Qingkai~2 1.School of Information and Electronic Engineering,Shandong Institute of Business and Technology,Yantai 264005,P.R.China 2.School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819,P.R.China

＜正＞In this paper,combining with model experiment,fault characteristics of single-span and dual-disc rotor system with bearing misalignment are investigated by the combination of Wavelet Packet Decomposition（WDP） and frequency -band energy ratio analysis ***,resampling is applied to ensure the accurate and efficient decomposition of signal *** then with the mother wavelet function ’db44’,the displacement signals were decomposed into 4 ***,through a comparison with the time-domain waveforms and amplitude spectrums of decomposed signals in different decomposing levels,the effects of different misalignments to system vibration are *** corresponding frequency-band energy ratio values can have an excellent corresponding relationship with the misalignment degree and actual speed which can be applied to fault feature extraction to implement effective diagnosis of misalignment fault.

关键词： Model Experiment bearing misalignment Fault Characteristics Single-span and Dual-disc Rotor System Wavelet Packet Decomposition Frequency-band Energy Ratio Analysis

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：