The Concept of a Full Scale Fatigue Test of a Su-22 Fighter Bomber

et al. 2017

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The Su-22 fighter-bomber is a military aircraft used in the Polish Air Force (PLAF) since the mid 1980’s. By decision of the Ministry of National Defence Republic of Poland, the assumed service life for this type of aircraft was prolonged up to 3200 flight hours based on the Full Scale Fatigue Test (FSFT) results. The FSFT was conducted using the real load profile defined during the Operational Load Monitoring Program (OLM) and the 3200 hour service life was also based on this load profile.In order to assure safe operation of all the 18 Su-22 aircraft, the Individual Aircraft Tracking program was introduced. The program was based on the results of the FSFT as well as the analysis of the flight parameters recorded by the THETYS onboard flight recorder.In this paper, the authors present the methodology, assumed fatigue hypothesis and preliminary results of the IAT program for the Polish Su-22.

Section: Definition Of the Fatigue Modelmentioning

confidence: 99%

Section: Introduction Of An Individual Aircraft Tracking Program For mentioning

confidence: 99%

Introduction of an Individual Aircraft Tracking Program for the Polish SU-22

Reymer

Kurdelski

et al. 2017

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“…Full Scale Fatigue Tests (FSFT) are a common way to prove fatigue life of aeronautical structures and their main components [6,7]. The FSFT of a MiG-29's vertical stabilizer is being currently carried out at the Institute of Aviation as an important part of a research project dedicated to a new composite patch repair technology.…”

Section: Vertical Stabilizer Full Scale Fatigue Testsmentioning

confidence: 99%

Localization of Sound Sources during Full Scale Fatigue Test of the Vertical Stabilizer with the Acoustic Holography Technique

2017

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An acoustic holography and its practical applications in engineering began to develop at the end of the 20th century. Currently, this technique is being commonly used to locate sound sources. This paper presents the use of an acoustic camera to locate sound sources during the Full Scale Fatigue Test of the MiG-29 stabilizer. During fatigue tests, the tested structure issues a series of sounds in the form of glitches, creaks or beats. These sounds are typical for a structure subjected to dynamic loading, but they can also be a source of diagnostic information about places of fatigue failures. The paper presents the results of measurements made during the fatigue test. Thanks to the analysis of the measurement results, it was possible to identify areas that are the basic source of sounds.

“…According to the technical requirements [1,2] during Stage I of the FSFT the aircraft with the wing sweep angle set at 30° was placed in the test rig and loaded by means of 16 hydraulic actuators (Fig. 2).…”

Section: Definition Of Landing Loads Spectrummentioning

confidence: 99%

“…As specified by the technical requirements [1,2], the main goal of the Su-22 FSFT was to confirm the aircraft's structure durability by carrying out a total number of 6000 landings and a total number of 3200 flight hours without damaging the primary structural components. Due to both the limited time to perform the test and the complications with changing the wing sweep angle it was decided to divide the test into three stages including: landing loads, flight loads and flap loads.…”

Section: Introductionmentioning

confidence: 99%

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

Reymer

Kurdelski

et al. 2015

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M onodentate, Semicarbazone, Thiosem icarbazone, But-2-yne, Tungsten(II) Reaction of [W I(C O )(N C M e)(dppm )(772 -M eC2M e)][BF4] {dppm = Ph2 P(C H 2 )PPh2} with an equim olar quantity of L {L = R R 'C N N H C O N H 2 (R = R ' = Me; R = H, R ' = Ph)} or L {L = R R 'C N N H C S N H 2 (R = R ' = Me, Et; R = Me, R ' = E t, Pr", Bu', Ph; R = H, R ' = Ph)} gives the m onodentately coordinated sem icarbazone or thiosem icarbazone products [W I(CO)L(dppm)(?7 2 -M eC2M e)][BF4] (1 -9 ) . 13C N M R spectroscopy suggests that the but-2 -yne ligand is donating four electrons to the tungsten in [W I(CO){H(Ph)CNN H CSN H 2 }(dppm)(?7 2 -M eC2M e)][BF4].