航空接地故障电弧损伤影响研究与预测  

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

作　　者：张铁纯[1] 廖茂桥 张波 田雷雷 司晓亮 ZHANG Tiechun;LIAO Maoqiao;ZHANG Bo;TIAN Leilei;SI Xiaoliang(College of Aeronautical Engineering,CAUC,Tianjin 300300,China;Hefei Hangtai Electrophysics Co.,Ltd.,Hefei 230031,China)

机构地区：[1]中国民航大学航空工程学院,天津300300 [2]合肥航太电物理技术有限公司,合肥230031

出　　处：《中国民航大学学报》2025年第1期75-82,共8页Journal of Civil Aviation University of China

基　　金：装备预研航空工业联合基金资助项目(20230044067001)。

摘　　要：故障电弧是飞机电气线缆互联系统(EWIS,electrical wire interconnect systems)最为常见的失效模式之一。为了研究不同条件参数对电弧损伤的影响,本文根据SAEAS5692标准中的振动实验方法,模拟因飞机振动导致的线束与燃油管路接地故障电弧,开展了机载28V直流电源、400Hz/115V交流电源条件下的接地故障电弧损伤实验研究,并基于流-固-热耦合数值计算方法建立了电弧损伤预测模型。结果表明:交流电源条件下的电弧由于瞬时功率较高造成线束熔断时间相比直流电源条件下更短,其电弧损伤明显小于直流电源条件下的电弧损伤;伴随振动频率增加,线束与管路接触时间延长,电弧损伤与振动频率呈正相关性;将实验与仿真结果进行对比,两者误差较小,有效验证了电弧损伤预测模型的适用性,为飞机EWIS线束安全评估提供一定参考。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 estab-lished.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 ap plicability of the arc damage prediction model and provides a certain reference for the safety assessment of the air-craft EWIS wire harness.

关 键 词：电气线缆互联系统(EWIS) 接地故障电弧 故障电弧损伤 流-固-热耦合 

分 类 号：TM645[电气工程—电力系统及自动化]