Modal Analysis for a Rod-Fastened Rotor considering Contact Effect Based on Double Fractal Model
Modal Analysis for a Rod-Fastened Rotor considering Contact Effect Based on Double Fractal Model
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基于双分形模型考虑接触效应的固杆转子模态分析
DOI：
10.1155/2019/4027353
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发表时间：
2019-05
影响因子：
1.6
通讯作者：
Guangyu Zhu
中科院分区：
文献类型：
--
作者：
Yang Liu;Qi Yuan;Pu Li;Guangyu Zhu
连杆转子是燃气涡轮机的核心部件。它包括几个圆盘和拉杆。接触界面的弯曲刚度是转子动力学分析的关键因素。盘的接触界面通常通过磨削制造。采用结构函数法对实验转子接触界面的实测轮廓曲线进行了分析，结果表明，采用分形维数D1和D2以及分形粗糙度参数G1和G2的双分形模型可以很好地描述转子接触界面。采用赫兹模型对接触界面上单个微凸体的接触进行了分析。在此基础上，推导了考虑预紧力和弯矩的接触界面抗弯刚度。通过三维有限元分析和实验模态测试，得到了不同预紧力和重力弯矩作用下实验转子的模态频率。观察到模态频率随接触界面名义压力的增大而增大，实验结果与计算结果一致。
The rod-fastened rotor is the core component of the gas turbine. It comprises several discs and tie rods. The flexural stiffness of the contact interface is the key factor for rotordynamic analysis. The contact interfaces of the discs are usually manufactured by grinding. The measured contour curve of the contact interfaces of an experimental rod-fastened rotor is analyzed by the structural function method, which shows that the contact interfaces can be well described by the double fractal model with fractal dimensions D1 and D2 and the fractal roughness parameters G1 and G2. The Hertz model is used to analyze the contact of the single asperity on the contact interface. On this basis, the flexural stiffness of the contact interface considering the pretightening force and the bending moment is derived. Modal frequencies of the experimental rod-fastened rotor under different pretightening forces and the bending moment (caused by gravity) are obtained by three-dimensional finite element analysis and experimental modal tests. It is observed that the modal frequencies increase with the nominal pressure of the contact interface, and the experimental results are consistent with the calculated results.
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影响因子：
3.3
作者：
T. F. Lehnhoff;K. Ko;M. Mckay
通讯作者：
T. F. Lehnhoff;K. Ko;M. Mckay
DOI：
10.1115/gt2012-68221
发表时间：
2012-06
期刊：
--
影响因子：
--
作者：
Jin Gao;Qi Yuan;Pu Li;Hongtao Zhang;Z. Lv
通讯作者：
Jin Gao;Qi Yuan;Pu Li;Hongtao Zhang;Z. Lv
影响因子：
0.8
作者：
R. Buczkowski;M. Kleiber;G. Starzyński
通讯作者：
R. Buczkowski;M. Kleiber;G. Starzyński
影响因子：
5
作者：
MAJUMDAR, A;TIEN, CL
通讯作者：
TIEN, CL
影响因子：
5
作者：
BHUSHAN, B;MAJUMDAR, A
通讯作者：
MAJUMDAR, A