Volume 27 Issue 2
Feb.  2012
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LIU Yuan, ZANG Chao-ping, LIU Zhong-hua. Influence of search algorithm on optimized measurement positions of effective independent method for modal test[J]. Journal of Aerospace Power, 2012, 27(2): 312-318.
Citation: LIU Yuan, ZANG Chao-ping, LIU Zhong-hua. Influence of search algorithm on optimized measurement positions of effective independent method for modal test[J]. Journal of Aerospace Power, 2012, 27(2): 312-318.
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Influence of search algorithm on optimized measurement positions of effective independent method for modal test

  • 1.

    College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

  • 2.

    Xi’an Aero-Engine Limited, Aviation Industry Corporation of China, Xi’an 710021, China

  • Received Date: 2011-03-03
  • Rev Recd Date: 2011-04-26
  • Publish Date: 2012-02-28
    Abstract
  • The influences of three different search algorithms,i. e.:direct search method,step accumulating method and step eliminating method,on the effective independent method were discussed with respect to the optimized measurement positions for modal test.An aero-engine component was taken as an example to demonstrate the application of the approach.The optimized measurement positions selected by these three search algorithms for the effective independent method were analyzed comparatively with respect to modal correlation,kinetic energy of each mode contributed to the measured positions and the Fisher information matrix.The results indicate that the step eliminating method can most effectively achieve the goal of the effective independent method by increasing the spatial resolution of the target mode shapes.

     

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