Journal of Civil Aviation University of China ›› 2025, Vol. 43 ›› Issue (1): 75-82.

• Aviation maintenance • Previous Articles     Next Articles

Study and prediction of the effect of aviation grounded faults arc damage

ZHANG Tiechun1 , LIAO Maoqiao1 , ZHANG Bo2 , TIAN Leilei 2 , SI Xiaoliang2
  

  1. 1. College of Aeronautical Engineering, CAUC, Tianjin 300300, China; 2. Hefei Hangtai Electrophysics Co., Ltd., Hefei 230031, China 
  • Received:2024-03-19 Revised:2024-05-15 Online:2025-04-09 Published:2025-04-09

Abstract:

Arc fault is one of the most common failure modes in aircraft electrical wire interconnect systems (EWIS). In order to
study the impact of different condition parameters on the arc damage, this paper simulated the grounded fault arc of
wire harness and fuel pipeline caused by aircraft vibration according to the vibration experimental method in SAE
AS5692 standard. The experimental research on grounded fault arc damage was carried out under the conditions of
airborne 28 V direct current (DC) power supply and 400 Hz/115 V alternating current (AC) power supply. And based
on the numerical computation method of fluid-solid thermal coupling, an arc damage prediction model was established. The results show that the arc under AC power conditions has a shorter wire harness melting time due to
higher instantaneous power compared to DC power conditions, and its arc damage is significantly smaller than that
under DC power conditions. As the vibration frequency increases, the contact time between the wire harness and
the pipeline is prolonged, and the arc damage is positively correlated with the vibration frequency. Comparing the
experimental and simulation results, the error between the two is relatively small, which effectively verifies the applicability of the arc damage prediction model and provides a certain reference for the safety assessment of the aircraft EWIS wire harness.

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