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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2015, Vol. 36 ›› Issue (2): 548-554.doi: 10.7527/S1000-6893.2014.0049

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

Outlier identification from impact experimental data of honeycomb sandwich panel

JIA Guanghui1, LI Xuan1, OUYANG Zhijiang1,2   

  1. 1. School of Aeronautics, Beihang University, Beijing 100191, China;
    2. Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621900, China
  • Received:2014-01-13 Revised:2014-04-11 Online:2015-02-15 Published:2014-04-30
  • Supported by:

    National Space Debris Thematic Project of China (K020110-1/3/6)

Abstract:

To correct the ballistic limit equations of honeycomb sandwich panel based on hypervelocity impact physical experiment data is a common method to obtain high credibility equations. In order to improve the reliability of physical experimental data, a method to distinguish the outliers is studied. Among 131 experimental data of honeycomb sandwich panel with carbon fiber reinforced plastic (CFRP) faceplates, 1 outlier is found using the method. Eliminating the outlier, new equations are obtained by re-correcting the equations based on the rest 130 data. The new equations' totality predicted rate and safety predicted rate reach 82.3% and 93.1%, respectively. And the sum of squared absolute errors and sum of squared relative errors are 0.010 and 0.506, respectively. Compared with the correction equations without eliminating the outlier, the new equations are improved. The results show that the experimental outlier data identification method is feasible and effective. To test the feasibility of the method, the experimental data of honeycomb sandwich panel with aluminum alloy faceplates are also analyzed and the results show that this method can be reasonably used to identify outliers.

Key words: hypervelocity impact, honeycomb sandwich panel, ballistic limit equation, outlier, equation correction

CLC Number: