Test Research and Finite Element Analysis on Extension Performance of Civil Aircraft Flaps Subjected to Extreme Temperature

Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 680)


Aircraft climate test was conducted to investigate the effect of extreme temperature on extension performance of civil aircraft flaps in aircraft climate laboratory. Test results show extending the flaps to 10° requires 9.5 s, 7.8 s, 7.6 s when the standard equipped aircraft was kept at −40 ℃, 20 ℃ and 40 ℃ for the stipulated time, respectively. The lower the temperature is, the more difficult it is to extend the flaps. Furthermore, a finite element analysis (FEA) mode of the flap motion mechanism was proposed to reveal the influence of extreme temperature on deformation and drive torque of the flaps. Actual motion law of flap motion mechanism was adopted to describe behavior of flap motion mechanism under extreme temperature. The numerical research shows the drive torque decreases from −0.51 × 104 to −4.52 × 104 N mm when temperature rises from 20 to 74 ℃; conversely the drive torque increases from −0.51 × 104 to 27.5 × 104 N mm when temperature drops from 2 to −55 ℃. In addition, the lower the temperature is, the more obvious the deformation mismatch of the flap mechanism is, which may cause the friction to increase. The increasing friction due to the temperature drop results in the higher drive torque required to extend the flaps, which is also the reason that the time for extending the flaps to 10° increases with the decrease of temperature. The numerical results are observed to mutually agree with the test results mentioned above that the low temperature makes it difficult to extend the flaps.


Aircraft climate test Standard equipped aircraft Civil aircraft flaps Finite element analysis Extreme temperature 



The authors gratefully acknowledge the support for this work from civil aircraft environmental adaptability research team.


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Copyright information

© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2021

Authors and Affiliations

  1. 1.AVIC Aircraft Strength Research InstituteXi’anChina
  2. 2.Northwestern Polytechnical UniversityXi’anChina

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