摘要
随着军事科学技术的发展,航空机电设备功能性能要求及一体化程度越来越高,并且产品所承受的环境与工作应力更加多样化、应力条件越来越严酷。在多应力作用下,航空机电设备的故障模式与故障机理更加复杂,由此引起的重大事故或事故征候频繁发生,导致航空机电设备的可靠性设计面临着严峻挑战,这已经成为制约航空装备质量与安全的瓶颈问题之一。本文分析了航空机电设备的多应力环境以及常见的故障模式与故障机理,研究了多应力作用下航空机电设备的故障耦合效应;研究了基于模型的航空机电设备的可靠性仿真分析流程,将多应力下基础单元失效物理模型与产品的性能模型相融合,形成了航空机电设备的性能可靠性仿真分析与评估方法;以某型航空电动燃油泵作为对象,对所提出的技术方法进行应用,得到了燃油泵额定流量增压值的性能退化曲线,以及初始状态、首翻期、总寿命等不同时刻下产品的性能可靠度。
With the development of military science and technology,the function and performance requirements and integration degree of aviation electromechanical equipment are becoming higher and higher,the environmental and working stress types are more diversified,and the stress conditions are getting more and more severe.Under the action of multiple stresses,the failure modes and failure mechanisms of aviation electromechanical equipment are more complex,which will result in frequent major accidents or accident symptoms.The reliability design of aviation electromechanical equipment is facing severe challenges,which has become one of the bottleneck problems restricting the quality and safety of aviation equipment.Firstly,this paper analyzes the multi stress environment,common failure modes and failure mechanism of aviation electromechanical equipment,and studies the failure coupling effect of aviation electromechanical equipment under multi stress.Secondly,the reliability simulation analysis process of aviation electromechanical equipment based on model is studied,the performance reliability simulation analysis and evaluation method of aviation electromechanical equipment are formed by integrating the physical model of basic unit failure under multi stress with the product performance model.Finally,a certain type of aviation electric fuel pump is selected as the object,and the technical methods proposed in this topic are applied.The performance degradation curve of the fuel pump rated flow and boost value is obtained,as well as the performance reliability of the product at different times such as the initial state,the first overturn period,and the total life.
作者
邵将
孙胜
孟理华
曾晨晖
Shao Jiang;Sun Sheng;Meng Lihua;Zeng Chenhui(China Aero Polytechnology Establishment,Beijing 100028,China)
出处
《航空科学技术》
2022年第5期24-31,共8页
Aeronautical Science & Technology
关键词
机电设备
故障机理
故障模式
失效物理模型
性能模型
可靠性仿真
electromechanical equipment
failure mechanism
failure mode
physical-of-failure model
performance model
reliability simulation
