Dynamic study of aircraft gear behaviour in some unusual conditions

• Autorzy: Niezgoda, T. , Małachowski, J. , Budzyński, A.
• Języki publikacji: EN

Abstrakty

EN

The paper presents CAE MBS analysis of aircraft front landing gear behaviour in unusual situations that can be caused by unpredictable obstacles. Numerical tools were applied, because real investigations can be relatively expensive and dangerous. One of unusual maintenance condition assumed increasing of the aircraft vertical velocity, caused by a loss of uplift forces (result of decreasing the horizontal velocity to shorten the airfield length needed to dissipate aircraft energy). The other analyzed maintenance condition assumed the aircraft landing with horizontal velocity, increased of a large percentage in comparison with its maximum value allowed by the aircraft manufacturer. Simulation also provided the gear dynamics analysis while crossing over obstacles placed on slightly damaged or makeshift airfield. During CAE tests, Lagrange spring/dumper elements used to simulate the behavior of deformable tyre and shock absorber oil-gas mixture. Simulations proved that increasing the vertical velocity of 25% and the horizontal one of 15% is safe for the aircraft and it can operate on damaged airfields. Investigations proved that aircraft maintenance conditions might be safely expanded, in comparison with its manufacturer suggestions. It enables the manufacturer to look for new and aircraft-safe applications that require special landing capabilities: Special Team Transport or Medical Evacuation.

Słowa kluczowe

EN

CAE MBS simulation; aircraft landing gears; unusual maintenance conditions

• Czasopismo: Journal of KONES
• Rocznik: 2006
• Tom: Vol. 13, No. 3
• Strony: 245-254
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Niezgoda, T.

autor

Małachowski, J.

autor

Budzyński, A.

• Military University of Technology, Gen. Kaliskiego 2 Str., 00-908 Warsaw, POLAND tel. [phone], fax [phone],

Bibliografia

• [1] Budzyński, A., Małachowski, J., Numerical movement analysis of the aircraft undercarriage front gear 3D model, Biuletyn Developments in Machinery Design and Control – Vol. 3, ATR, Bydgoszcz 2004.
• [2] Cichosz, E., Podwozie i amortyzacja samolotu, WAT, Warszawa, 1968.
• [3] Currey N. S., Aircraft Landing Gear Design: Principles and Practices, AIAA Education Series, 1988.
• [4] Daugherty, R. H., A Study of the Mechanical Properties of Modern Radial Aircraft Tires, NASA, Langley Research Center, Hampton, Virginia, USA, 2003.
• [5] Małachowski, J., Krasoń, W., Budzyński, A.: Wybrane problemy analizy dynamicznej podwozia samolotu transportowego, Zeszyty Katedry Mechaniki Stosowanej, Politechnika Śląska, Gliwice, 29/2005.
• [6] Małachowski, J., Niezgoda, T., Budzyński, A., Kowalski, W., Research of transport aircraft’s landing gear with the use of numerical method, ECCOMAS Thematic Conference Multibody, Advances in Computational Multibody Dynamics, Instituto Superior Tecnico, Lizbona, Portugalia, 2003.
• [7] Morrison, D., Neff, G., Zahraee, M., Aircraft Landing Gear Simulation and Analysis, ASEE Annual Conference Proceedings, Milwaukee, 1997.
• [8] Niezgoda, T., Małachowski, J., Barnat, W., Budzyński, A., Analiza numeryczna dynamiki podwozia samolotu transportowego, VI Konferencja MES w komputerowym wspomaganiu analizy, projektowania i wytwarzania, WAT, Rynia 2003.
• [9] Niezgoda, T., Woropay, M., Budzyński, A., Symulacja numeryczna zjawiska eksploatacyjnego, na przykładzie najazdu goleni podwozia podporowego samolotu na przeszkodę, Konferencja Problemy Jakościowe, Energetyczne i Eksploatacyjne w Maszynach Cieplnych, ATR, Bydgoszcz, 2004.
• [10] Pazmany, L., Landing Gear Design for Light Aircraft, Pazmany Aircraft Corporation, San Diego, 1986.
• [11] Pritchard, J. I., An Overview of Landing Gear Dynamics, NASA, Langley Research Center, Hampton, Virginia, USA, 1999.