Crack Propagation and Fault Diagnosis for Gears Using FEM
发布时间：2020-12-08 12:12
系统的状态监测和诊断已成为机械行业的重要研究领域,其发展趋势是寻求合适的理论方法来实现对机械系统早期故障的监测和诊断以取代机械故障后维修的现实。在过去二十年内,传动系统中所存在的齿轮磨损严重以及轮齿啮合故障等问题越来越受到使用者的重视,尤其是齿轮裂纹扩展和裂纹故障分析研究日益重要。已有的研究主要集中在分析齿轮轮圈的厚度对裂纹扩展路径的影响,和针对发生故障的齿轮传动系统直接进行动力仿真。对于前者,其研究方法主要是基于断裂力学的基本理论,而这些原理往往包含大量的变量和方程,需综合运用各种计算机软件才能达到裂缝扩展路径的预测目的。对于后者,一些研究者一方面针对齿轮传动系统进行三维裂纹故障仿真,另一方面也通过传统的分析方法来研究其他类型的齿轮故障。为了更好的进行轮齿裂纹扩展路径的预测,发展和丰富现有的齿轮故障诊断技术,本文利用二维分析方法对圆柱齿轮传动系统进行渐进结构优化,进而提出了一种新的适用方法来进行轮齿裂纹扩展路径预测,同时利用有限元方法对存在轮齿故障(包括裂纹、剥落等)的三维圆柱齿轮传动系统进行动力仿真和分析,并得出不同轮齿故障对齿轮传动系统振动响应的影响规律。本文的主要工作立足于有限...
【文章来源】：重庆大学重庆市 211工程院校 985工程院校 教育部直属院校
【文章页数】：81 页
【学位级别】：硕士
【文章目录】：
ABSTRACT
中文摘要
1 INTRODUCTION
1.1 Generality
1.2 Literature Survey
1.3 Thesis Outline
2 GEAR CRACK PROPAGATION PATH PREDICTION BASED ON ESO
2.1 Problem Definition
2.2 Fracture Analysis Based on LEFM
2.3 Basic Applied Stresses on Spur Gear Tooth
3 PROPOSED METHOD
3.1 Generality of Structural Evolutionary Optimization
3.2 Theoretical concept of ESO
3.3 Design Example
3.4 New Proposed Method Algorithm
3.5 Two Dimensional Finite Element Model
3.6 Results and Discussion
3.7 Comparison with Previous Researches
4 DEFECT EFFECTS ON THE VIBRATION RESPONSE OF SPUR GEAR
4.1 Research Orientation
4.2 Essential Concepts of Spur Gear
4.2.1 Basic Understanding of Spur Gear
4.3 Case Study failures on Gear teeth
5 SPUR GEAR DYNAMIC MODEL
5.1 Theoretical Vibration Model of the Spur Gear Pair
5.2 Equation of Motion
6 THREE DIMENSIONAL MODELING OF THE SPUR GEAR
6.1 3D Modeling
6.2 Model Geometry
6.3 Finite Element Modeling
6.3.1 FE Model for Dynamic Simulation
6.3.2 FE Model for gear mesh stiffness and modal analysis determination
7 SIMULATION RESULTS OF GEARING
7.1 Simulation Results
7.2 Dynamic Modeling Results
7.3 Meshing Stiffness Results
7.4 Modal Analysis Results
8 CONCLUSION
8.1 Summary
8.2 Recommendations for Future Work
Acknowledgement
REFERENCES
Appendix
【参考文献】：
期刊论文
[1]Finite Element Analysis of Internal Gear in High-Speed Planetary Gear Units[J]. 葛楠,张俊. Transactions of Tianjin University. 2008(01)
本文编号：2905064
【文章来源】：重庆大学重庆市 211工程院校 985工程院校 教育部直属院校
【文章页数】：81 页
【学位级别】：硕士
【文章目录】：
ABSTRACT
中文摘要
1 INTRODUCTION
1.1 Generality
1.2 Literature Survey
1.3 Thesis Outline
2 GEAR CRACK PROPAGATION PATH PREDICTION BASED ON ESO
2.1 Problem Definition
2.2 Fracture Analysis Based on LEFM
2.3 Basic Applied Stresses on Spur Gear Tooth
3 PROPOSED METHOD
3.1 Generality of Structural Evolutionary Optimization
3.2 Theoretical concept of ESO
3.3 Design Example
3.4 New Proposed Method Algorithm
3.5 Two Dimensional Finite Element Model
3.6 Results and Discussion
3.7 Comparison with Previous Researches
4 DEFECT EFFECTS ON THE VIBRATION RESPONSE OF SPUR GEAR
4.1 Research Orientation
4.2 Essential Concepts of Spur Gear
4.2.1 Basic Understanding of Spur Gear
4.3 Case Study failures on Gear teeth
5 SPUR GEAR DYNAMIC MODEL
5.1 Theoretical Vibration Model of the Spur Gear Pair
5.2 Equation of Motion
6 THREE DIMENSIONAL MODELING OF THE SPUR GEAR
6.1 3D Modeling
6.2 Model Geometry
6.3 Finite Element Modeling
6.3.1 FE Model for Dynamic Simulation
6.3.2 FE Model for gear mesh stiffness and modal analysis determination
7 SIMULATION RESULTS OF GEARING
7.1 Simulation Results
7.2 Dynamic Modeling Results
7.3 Meshing Stiffness Results
7.4 Modal Analysis Results
8 CONCLUSION
8.1 Summary
8.2 Recommendations for Future Work
Acknowledgement
REFERENCES
Appendix
【参考文献】：
期刊论文
[1]Finite Element Analysis of Internal Gear in High-Speed Planetary Gear Units[J]. 葛楠,张俊. Transactions of Tianjin University. 2008(01)
本文编号：2905064
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