摘要
民用飞机舵机作动器作为复杂的机-电-液耦合设备,其受载情况复杂,结构疲劳损伤行为相比机体结构具有特殊性。要保证作动器结构承载能力,进而确保作动器功能正常,就必须制定合理的结构检查间隔,对作动器结构进行必要的检查。本文从适航规章要求出发,针对民用飞机舵机作动器结构研究了单裂纹及广布疲劳损伤情况下检查间隔的确定方法,提出以疲劳寿命原则及裂纹扩展寿命原则两种方法计算得到门槛值中的较小者作为作动器结构最终的检查门槛值,并分析判别了检查间隔制定工作存在的风险点,提出了检查间隔需要关注的内容。研究结果表明,单裂纹及广布疲劳损伤情况下检查间隔方法是一种安全、保守的评定方法,特别是针对疲劳行为复杂、无法明显判断裂纹扩展规律的作动器结构,能够为舵机作动器等复杂机-电-液耦合设备的结构检查间隔的制定提供理论和工程指导。
As a complex mechanical-electrical-hydraulic coupling device,the civil aircraft rudder actuator is subject to complex loading conditions,and the structural fatigue damage behavior is special compared with that of the airframe structure.To ensure the actuator structural loading capacity,and then ensure the normal function of the actuator,it is necessary to establish reasonable structural inspection intervals,and carry out the necessary inspections on the actuator structure.In this paper,based on the requirements of airworthiness regulations,the method of determining inspection intervals under single crack and widespread fatigue damage was studied for the rudder actuator structure of civil aircraft,and it was proposed that the smaller of the threshold values calculated by fatigue life principle and crack propagation life principle can be used as the final inspection threshold of actuator structure of civil aircraft,and it also analyzed and identified the risks of inspection intervals,and proposed the points of concern for the inspection intervals.The conclusion of the analysis shows that the inspection interval method is a safe and conservative assessment method for single crack and widespread fatigue damage,especially for actuator structures with complex fatigue behaviors where the crack extension pattern cannot be obviously judged,and it can provide theoretical and engineering guidance for the establishment of inspection intervals for the structures of complex mechanical-electricalhydraulic coupling equipment such as rudder actuators.
作者
隋立军
安雨晴
张妮娜
李元元
张昭
Sui Lijun;An Yuqing;Zhang Nina;Li Yuanyuan;Zhang Zhao(AVIC Xi'an Flight Automatic Control Research Institute,Xi'an 710076,China;AVIC Aircraft Strength Research Institute of China,Xi'an 710065,China;AVIC XAC Commercial Aircraft Co.,Ltd.,Xi'an 710089 China;Xi'an Aircraft Certification Center,Airworthiness Certification Center of CAAC,Xi'an 710065,China;COMAC Beijing Aircraft Technology Research Institute,Beijing 102211,China)
出处
《航空科学技术》
2024年第11期104-111,共8页
Aeronautical Science & Technology
关键词
民用飞机
作动器
单裂纹
广布疲劳损伤
检查间隔
持续适航
civil aircraft
actuators
single crack
widespread fatigue damage
inspection interval
continuous airworthiness
