美国《工程索引》核心期刊
中国科学引文数据库核心期刊
国际刊号:ISSN 1005-1120
国内刊号:CN 32-1389/V
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  • 主管:工业和信息化部
  • 主办:南京航空航天大学
  • 国际刊号:ISSN 1005-1120
  • 国内刊号:CN 32-1389/V
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Liang Anyang, Huang Guoyuan, Zhang Yuetong, Yue Lin*.Modeling and Dynamic Analysis for the Foundation of a Blade Rotor System[J].南京航空航天大学学报英文版,2017,34(3):326-332
Modeling and Dynamic Analysis for the Foundation of a Blade Rotor System
  
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英文关键词:finite element model; rotor; modal analysis; harmonic response analysis; foundation
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Liang Anyang, Huang Guoyuan, Zhang Yuetong, Yue Lin* 1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P. R. China; 2. School of Engineering and Informatics, University of Sussex, Brighton BN19RH, United Kingdom 
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      In order to achieve the model based fault monitoring and diagnosis, an accurate model for the rotor system is necessary to locate and quantify faults. Since the dynamic characteristics of a blade rotor system is influenced by foundation flexibility, the modeling and dynamic analyses on the foundation were sequentially investigated. Firstly, the effect of element size on the model convergence was investigated using the forward difference quotient as the slope of the frequency difference, which found that the model converged when the element size refined to 4 mm. Secondly, a modal analysis and a harmonic response analysis were performed to obtain the dynamic characteristics of the foundation structure. Finally, an optimization to the foundation utilizing an additional stiffener was conducted to reduce the foundation response and make the critical speed far away from the working frequency band of 20—50 Hz.
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