The Definition of the Load Spectrum for SU-22 Fighter-Bomber Full Scale Fatigue Test

Q4 Engineering

Fatigue of Aircraft Structures Pub Date : 2015-12-01 DOI:10.1515/fas-2015-0005

P. Reymer, M. Kurdelski, A. Leski, Krzysztof Jankowski

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引用次数: 1

Abstract

Abstract The Su-22 fighter-bomber is a military aircraft used in the Polish Air Force since the mid 1980’s. By the decision of the Polish Ministry of Defense the predicted service life for this type of aircraft will be extended to 3200 flight hours. Due to the fact that some aircraft were nearing the end of the service life guaranteed by the manufacturer, the actual service life, determined based on the flight profile in the Polish Air Force, had to be validated. Consequently, the Full Scale Fatigue Test (FSFT) had to be carried out in order to verify that the required service life was attainable. This article describes the process of preparation of the load spectra used in the Su-22 FSFT. Due to the fact that the Su-22 has a variable sweep wing the whole test was divided into three Stages (landing, flight and flap loads) carried out at different wing sweep angles (30°/45°/30°). The spectra were developed using the historical data gathered from Flight Data Recorders (FDR), strain signals acquired during the Operational Load Monitoring program (OLM) and aerodynamic calculations.

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苏-22战斗轰炸机全尺寸疲劳试验载荷谱定义

苏-22战斗轰炸机是波兰空军自20世纪80年代中期开始使用的一种军用飞机。根据波兰国防部的决定，该型飞机的预计使用寿命将延长至3200飞行小时。由于一些飞机已接近制造商保证的使用寿命的终点，根据波兰空军的飞行剖面确定的实际使用寿命必须进行验证。因此，必须进行全尺寸疲劳试验(FSFT)，以验证是否可以达到所需的使用寿命。本文介绍了Su-22 FSFT载荷谱的制备过程。由于苏-22有可变后掠翼，整个测试分为三个阶段(着陆、飞行和襟翼载荷)，在不同的机翼后掠角(30°/45°/30°)下进行。该光谱是利用飞行数据记录仪(FDR)收集的历史数据、运行负荷监测程序(OLM)期间获得的应变信号和空气动力学计算得出的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fatigue of Aircraft Structures Engineering-Safety, Risk, Reliability and Quality

CiteScore

0.40

自引率

0.00%

发文量

期刊介绍： The publication focuses on problems of aeronautical fatigue and structural integrity. The preferred topics include: full-scale fatigue testing of aircraft and aircraft structural components, fatigue of materials and structures, advanced materials and innovative structural concepts, damage tolerant design of aircraft structure, life extension and management of ageing fleets, structural health monitoring and loads, fatigue crack growth and life prediction methods, NDT inspections, airworthiness considerations.