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工程设计学报
工程设计学报  2015, Vol. 22 Issue (2): 129-136    DOI: 10.3785/j.issn. 1006-754X.2015.02.005
保质设计     
频繁启停过程中拉杆微裂纹引起的组合转子性能退化研究
李雪鹏1，2，王艾伦1，2
1． 中南大学 高性能复杂制造国家重点实验室，湖南 长沙 410083；
2． 中南大学 机电工程学院，湖南 长沙 410083
Research on performance degradation of combined rotor considering the microcrack on the rod caused by frequent start-up and stop-down
LI Xue-peng1，2， WANG Ai-lun1，2
1. State Key Laboratory of High Performance and Complex Manufacturing, Central South University，Changsha 410083，China;2. College of Mechanical and Electrical Engineering，Central South University，Changsha 410083，China
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摘要： 燃气轮机的性能下降很大程度上是由于燃机的核心部件——组合转子的退化导致的，因此，非常有必要重点研究组合转子的性能退化规律．组合转子局部结构的损伤，必将导致整体性能的下降．从该角度出发，建立组合转子的有限元模型，对组合转子拉杆裂纹进行扩展计算，定义组合转子性能退化量，分析了不同尺寸的拉杆裂纹对转子性能退化的影响．研究结果表明：随着裂纹尺寸的逐渐增加，组合转子的退化速率逐渐加快；不同微裂纹拉杆的分布形式对组合转子退化程度影响不同，当微裂纹拉杆相邻分布时组合转子退化速率最快，裂纹拉杆180°分布时组合转子退化速率最慢．
关键词： 组合转子;  疲劳微裂纹;  退化量;  接触界面刚度    
Abstract: The degradation of combined rotor, the core parts of the gas turbine, decreases the performance of gas turbine in a large extent. In view of this, it is particularly important to research the performance degradation of the combined rotor. The performance degradation characteristics of combined rotor were discussed, from the perspective view of performance degradation caused by rod crack. The finite element model of the combined rotor was established. The crack extension rate of the rod was gotten by using the finite element model. Then, the measurement of performance degradation which was caused by micro cracks was put forward, and the assessment of performance degradation was completed as well. The results showed that the micro crack extension rate got faster when the size of crack increased; the microcrack tie rod with different distribution form did make a difference to the degradation of the combined rotor as the adjacent microcrack tie rods led to the fastest degradation rate and the 180° distributed microcrack tie rods led to the slowest degradation rate.
Key words: combined rotor    fatigue crack    degradation degree    contact interface stiffness
收稿日期: 2014-07-02 出版日期: 2015-04-28
基金资助:

国家重点基础研究发展计划(973计划)资助项目（2013CB035706）；中南大学研究生自主探索创新项目（2014zzts189）.
作者简介: 李雪鹏（1987—），男，福建厦门人,硕士生，从事复杂机电系统动力学研究，E-mail：xuepeng_li@126．com. 通信联系人：王艾伦（1959—），男，教授，博士生导师，从事机械动力学和高等机构学研究，E-mail:walwlz@csu.edu.cn.
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引用本文:

李雪鹏，王艾伦. 频繁启停过程中拉杆微裂纹引起的组合转子性能退化研究[J]. 工程设计学报, 2015, 22(2): 129-136.

LI Xue-peng， WANG Ai-lun. Research on performance degradation of combined rotor considering the microcrack on the rod caused by frequent start-up and stop-down. Chinese Journal of Engineering Design, 2015, 22(2): 129-136.

链接本文:

https://www.zjujournals.com/gcsjxb/CN/10.3785/j.issn. 1006-754X.2015.02.005    或    https://www.zjujournals.com/gcsjxb/CN/Y2015/V22/I2/129

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