Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (2): 263-267.DOI: 10.12068/j.issn.1005-3026.2014.02.025

• Mechanical Engineering • Previous Articles     Next Articles

A Prestressed Component Mode Synthesis Method for Dynamics Analysis of BliskShaft Integrated Rotor

KOU Haijiang1, YUAN Huiqun1,2, LI Yan1, YANG Wenjun1   

  1. 1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2. School of Sciences, Northeastern University, Shenyang 110819, China.
  • Received:2013-06-18 Revised:2013-06-18 Online:2014-02-15 Published:2013-11-22
  • Contact: YUAN Huiqun
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Abstract: Dynamicallty analyzing a bliskshaft integrated rotor has to solve the problem of large scale finite element mesh. So, a prestressed component mode synthesis method was proposed, with which the static and rotating frequencies of the first two blisks were calculated. The principle for choosing the modal truncation number, which influenced the accuracy of the dynamics analysis of the bliskshaft integrated rotor, was presented. By comparing the static frequency with rotating one of the bliskshaft integrated rotor, the effect of rotation on the modal characteristics of the system was figured out. Modal analysis of the blisks and the bliskshaft integrated rotor indicates that the rotating frequency corresponding to the blade modes is reduced due to the effect of the shaft,and the coupling modes among the blades, disk and shaft are found, which illustrates the importance of the dynamics analysis of bliskshaft integrated rotor with large scale finite element mesh.

Key words: bliskshaft integrated rotor, component mode synthesis(CMS)method, rotating frequency, static frequency, prestressed modal analysis

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