Numerical analysis of bird strike events with the helicopter windshield

• Autorzy: Ćwiklak J. , Grzesik N.

Identyfikatory

DOI

10.5604/12314005.1216437

• Języki publikacji: EN

Abstrakty

EN

The aim of this article is to describe simulation results of a bird strike with a helicopter windshield. The simulation was performed based on LS-DYNA software by means of the SPH and Lagrangian methods. For the sake of the analysis, we selected a light helicopter, which is not covered by any certification requirements with regard to the windshield. The simulations were conducted for various bird shapes (sphere, cylinder, cylinder with hemispherical endings) for the cruising speed of Vc = 285 km/h. As a result of the simulations, we achieved comparative analyses of the methods at stake in the aspect of time curves of the kinetic energy, velocity and windshield deformation. The findings are depicted graphically and are presented in the form of charts. The deformations that were obtained as a result of the conducted tests may be referred to the data included in the AAIB report, which described the case of damaging the Agusta A-109C helicopter due to a collision with a seagull at the speed of approximately 278 km/h. The deformations obtained through numerical simulation do not make an accurate representation of this type of damage as in the case of a real one. Nevertheless, they reveal its character. While examining the test simulations from the quantity viewpoint, it is possible to observe slight discrepancies related to the applied approaches of bird modelling. In case of the kinetic energy, the slight discrepancies in the initial moment stem from rounding the mass of a single particle of the model, by means of the SPH method. The velocity curves of the accepted centre of the bird model vary considerably, depending upon its shape, which is linked with the deformation manner of the particular models.

Słowa kluczowe

EN

air transport; bird strikes; numerical analysis

• 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: 2016
• Tom: Vol. 23, No. 3
• Strony: 85--92
• Opis fizyczny: Bibliogr. 20 poz., rys.

Twórcy

autor

Ćwiklak J.

• Polish Air Force Academy, Aviation Faculty Dywizjonu 303 Street 35, 08-521 Deblin, Poland tel.: [phone], fax: [phone]

autor

Grzesik N.

• Polish Air Force Academy, Aviation Faculty Dywizjonu 303 Street 35, 08-521 Deblin, Poland tel.: [phone], fax: [phone]

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.