用于缝翼疲劳试验随动加载方法研究  

Research on Follow-up Loading Method for Slat Fatigue Test

作　　者：郭永跃 刘冰[1] GUO Yongyue;LIU Bing(National Key Laboratory of Strength and Structural Integrity,Aircraft Strength Research Institute of China,Xi′an710065,Shaanxi,China)

机构地区：[1]中国飞机强度研究所,强度与结构完整性全国重点实验室,陕西西安710065

出　　处：《工程与试验》2024年第1期60-62,共3页Engineering and Test

摘　　要：某型飞机缝翼全尺寸疲劳试验属于结构疲劳适航验证试验,其主要目的是暴露缝翼结构的疲劳薄弱部位,验证缝翼是否满足广布疲劳损伤(WFD)的相关要求,为结构设计和制造工艺改进及制定飞机结构的有效性限制(LOV)和相关WFD敏感结构的结构更改点提供试验依据。试验过程中,缝翼翼面随试验载荷谱工况变化,打开角度发生变化。为模拟真实缝翼运动状态和受载情况,保证缝翼结构在不同构型下加载的准确性,本试验要求翼面随动加载。本文根据试验要求提出了一种随动加载方法,设计了一种随动加载机构,在缝翼收放过程中,通过控制随动加载机构,使加载作动筒的固定点跟随缝翼加载点同步运动,实现翼面偏转、加载点位置和加载力同步协调一致,最终实现缝翼载荷的随动加载。The full-scale fatigue test of a certain type of aircraft slat belongs to structural fatigue airworthiness verification test.The main purpose of the test is to expose the fatigue weak parts of the slat structure,and verify whether the slat can meet the relevant requirements of widespread fatigue damage(WFD).Besides,the test can provide test basis for the structural design,the improvement of manufacturing process,the formulation of limit of validity(LOV)for aircraft structure and structural change parts of related WFD structures.The follow-up loading technology is adopted in the test to simulate the actual state and loading condition,and ensure the accuracy of the loading under different configurations,so the opening angle of the slat surface will vary with the change of load spectrum.Finally,the follow-up loading of slat is realized.In the paper,a follow-up loading method is proposed according to the test requirements,and a follow-up loading mechanism is designed.In the process of slat retraction,by controlling the follow-up loading mechanism,the fixed point of the loading actuator moves synchronously with the loading point of slat,so as to realize the synchronous coordination of the wing deflection,the loading point position and the loading force,and finally realize the follow-up loading of the slat load.

关 键 词：缝翼 疲劳试验 载荷 随动加载 

分 类 号：V216.3[航空宇航科学与技术—航空宇航推进理论与工程]