Computational-and-Experimental Methods for Studying Bird Strike Resistance of Aviation Engineering Elements

Aeronautical and Space-Rocket Engineering


Аuthors

Lepeshkin A. R.*, Aung K. M.**

Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: lepeshkin.ar@gmail.com
**e-mail: aung.kxinemyint@yandex.ru

Abstract

The article considers computational-and-experimental methods for studying bird strike resistance of the aircraft elements for the transport aviation airplanes. The authors performed analysis and comparison of foreign equipment employed for the bird strike resistance testing with the similar domestic equipment. Computational-and-experimental methods for studying aircraft elements (front wing slat, etc.) for bird strike resistance are elaborated, and a computational formula with account for the real angles of a bird interaction with aircraft elements is proposed. The article the results of the aircraft elements computational studies for the bird strike resistance with the ANSYS LS DYNA software packages. The studies contain the curves of kinetic energy and force of impact of the bird strike variation while interaction with aircraft elements, as well as the results of the increased slat skin thickness computing to improve the designing and strengthen its structure during the bird strike and increase flight safety. The authors developed a new comparative analysis of the aircraft slat and windshield kinetic energy variation depending on the impact interaction time at the identical parameters of the bird and its velocity. The results of the numerical analysis are being compared with the structural element damage after testing.
The authors elaborated the technique for the bird strike resistance experimental studies considering new specifics of the air gun, protected by the Russian Federation patent of invention. The said air gun differs from the foreign or domestic analogues by:
- the receiver concentrically positioned with the gun barrel (which reduces significantly the size of the testing equipment);
- the shortened barrel length, which is two-fold smaller than that of the foreign equipment.
Thus, the gun is rather mobile and may be exploited with various installations and test benches for experimental studies of the aircraft elements bird strike resistance. Besides, multiple experimental studies by the developed technique revealed that the developed air gun demonstrated averagely five-fold less dispersion by the bird velocity than the foreign air guns.
The article adduces the results of experimental studies on the bird strike resistance of the aircraft units and elements with the developed air gun and special equipment After conducting the specified special tests, an assessment of the damageability of aviation equipment is being performed.
The developed computational-and-experimental methods for the aircraft elements bird strike resistance studying allow for scientifically sound computational-and-experimental state assessment of the structures and the of impact dynamic processes parameters while experimental studies of the bird strike resistance. They allow as well reducing the costs of aviation equipment developing by the number of experimental studies with the developed computational-and-experimental methods reduction.

Keywords:

computational-and-experimental methods, aviation engineering elements, bird strike resistance of the wing front part, wing leading edge displacements image, pneumatic gun, of modeling a bird strike on the wing slat

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