The invention relates to the technical field of dynamic balance testing, and discloses a method for calculating an on-hook vibration fatigue load spectrum of an aircraft external store through a test analogy method, which provides an input condition for the simulation evaluation of the hanging fatigue life of the external store. The method comprises the following steps: designing a rigidity simulation test piece corresponding to the external store structure of the aircraft; real vibration response spectrums of the head and the tail of the external store of the aircraft are determined; a combined body composed of the rigidity simulation test piece and the hanging frame is hung on a vibration test platform, and then vibration magnitude adjustment is conducted through the vibration test platform according to the determined real vibration response spectrum; when a test vibration response spectrum calculated by data acquired by acceleration sensors at the head and the tail of the rigidity simulation test piece is consistent with a real vibration response spectrum, selecting test response data of at least two acceleration sensors at a butt joint hanging point of the hanging rack and the rigidity simulation test piece; and relevant processing is carried out on the corresponding data of the test to obtain the on-hook vibration fatigue load spectrum of the external store of the airplane.
本发明涉及动平衡测试技术领域,公开一种试验类推法计算飞机外挂物挂机振动疲劳载荷谱的方法,为外挂物挂飞疲劳寿命仿真评估提供输入条件。方法包括:设计与飞机外挂物结构相对应的刚度模拟试验件;确定飞机外挂物头部和尾部的真实振动响应谱;将刚度模拟试验件与挂架组成的联合体挂于振动试验平台上,再以振动试验平台根据确定的真实振动响应谱进行振动量级调校,使刚度模拟试验件头部和尾部加速度传感器所采集的数据所计算的试验振动响应谱与真实振动响应谱一致时,选取挂架与刚度模拟试验件对接挂点处至少两个加速度传感器的试验响应数据;再对该试验相应数据进行相关处理后得到飞机外挂物挂机振动疲劳载荷谱。
Method for calculating on-hook vibration fatigue load spectrum of external store of airplane through test analogy method
试验类推法计算飞机外挂物挂机振动疲劳载荷谱的方法
2023-04-14
Patent
Electronic Resource
Chinese
IPC: | G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B64F GROUND OR AIRCRAFT-CARRIER-DECK INSTALLATIONS SPECIALLY ADAPTED FOR USE IN CONNECTION WITH AIRCRAFT , Boden- oder Flugzeugträgerdeckeinrichtungen besonders ausgebildet für die Verwendung in Verbindung mit Luftfahrzeugen / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung |
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