Global FEM model of combat helicopter

• Autorzy: Gmurczyk G. , Reymer P. , Kurdelski M.
• Języki publikacji: EN

Abstrakty

EN

Air structures like Mi-24 were designed in last decades of the XX century, when computer aided design was not available. Philosophy of the exploitation so-called "safe life" postulate exploitation is defined by the manufacturer time. Such attitude turned out very uneconomical because of the various profiles of the use of aircrafts. Extending the initial period of exploitation is a quite common way to extend an aircrafts' life. Such solutions are accepted in the majority of countries, even the richest. In order to obtain detailed geometry of the real structure reversed engineering techniques were used. The geometry was obtained using two methods: digital photogrammetry and optical scanning using ATOS scanner from GOM Company. Geometric model, which was used for numerical Finite Element Method model, was developed based on the data from measurements, available technical documentation and detailed inspection of the structure. Global FEM model is being used for finding critical elements of aircraft's structure. Structure elements such as stringers, ribs or frames were modelled using bar and beam elements with specially defined properties and cross sections. Structure elements which didn't take part in transferring the loads, but with significant mass were made in a simplified manner so that their weight in the model correspond to actual or were modelled as concentrated masses.

Słowa kluczowe

EN

Mi-24 global FEM model; photogrammetry; 3D scanning; reverse engineering; FEM

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2011
• Tom: Vol. 18, No. 2
• Strony: 137--144
• Opis fizyczny: Bibliogr. 6 poz., rys.

Twórcy

autor

Gmurczyk G.

autor

Reymer P.

autor

Kurdelski M.

• Air Force Institute of Technology Division for Aeronautical Systems' Reliability & Safety Księcia Bolesława Street 6, 01-494 Warsaw Poland Post Office 96 phone: [phone], fax: [phone],

Bibliografia

• [1] Dowództwo Wojsk Lotniczych, Śmigłowiec Mi-24W. Opis techniczny, Książka 2 – Płatowiec i zespół napędowy, Poznań 1989.
• [2] United Technologies Corp., Stratford Sikorsky Aircraft Div. Plan, Formulate, and Discuss a Nastran Finite Element Model of the UH-60A Helicopter Airframe, CT. – February 1990.
• [3] Wrona, M. et al., Sprawozdanie Nr 92/31/2008. Wykonanie pomiaru fotogrametrycznego śmigłowca Mi-24, Warszawa 2008.
• [4] Wrona, M. et al., Numeryczna analiza stanu naprężenia materiału w belce ogonowej i końcowej śmigłowca Mi-24, Sprawozdanie nr 81/31/2009, ITWL, Warszawa 2009.
• [5] Wrona, M. et al., Model globalny MES kadłuba śmigłowca Mi-24, Sprawozdanie nr 98/31/2009, ITWL, Warszawa 2009.
• [6] Wrona, M. et al., Numeryczna analiza trwałości belki ogonowej i statecznika pionowego śmigłowca Mi-24, Sprawozdanie nr 113/31/2009, ITWL Warszawa 2009.