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Abstract
Penelitian ini mempelajari pengaruh geometri burung terhadap tekanan impak pada kasus tabrak burung, yaitu tekanan hugoniot dan stagnasi. Geometri burung berbentuk capsule atau silinder dengan kedua ujung setengah bola. Geometri disimulasikan dengan rasio L/D yang berbeda yaitu 1,4;1,6; 1,8 dan 2. Model material elastis, plastis, hidrodinamik digunakan pada simulasi. Simulasi model burung dilakukan dengan metode lagrangian pada variasi kecepatan 100 m/s, 200 m/s dan 300 m/s. Hasil simulasi menunjukkan dengan variasi rasio L/D diperoleh nilai tekanan Hugoniot jauh lebih tinggi sekitar 10-19 kali lipat tekanan stagnasi pada L/D = 1,4, 8-18 kali pada L/D = 1,6, 9-17 kali pada L/D = 1,8 dan 4-16 kali pada L/D = 2. Nilai tekanan Hugoniot menunjukkan nilai yang lebih rendah pada rasio L/D 1,6 dibanding rasio lainnya pada kecepatan 200 m/s dan 300 m/s dan tekanan stagnasi lebih tinggi pada rasio L/D 2 pada kecepatan impak 200 m/s dan 300 m/s.
This research studies influence of bird geometry on impact pressures during bird strike, namely Hugoniot and Stagnation pressure. Bird geometry is capsule or cylinder with hemisphere end. The geometry is simulated with different L/D ratio, 1.4, 1.6, 1.8 and 2. Elastic-plastic hydrodynamic material model is used in simulation. Bird model simulation are using lagrangian method and initial velocities are 100 m/s, 200 m/s dan 300 m/s. The results show variation of L/D ratio provide Hugoniot pressure 10-19 times higher than stagnation pressure in L/D = 1.4, 8-18 times in L/D = 1.6, 9-17 times in L/D = 1.8 and 4-16 times in L/D = 2. Hugoniot pressures show lower in ratio L/D = 1.6 compared to other for velocities 200 m/s and 300 m/s and stagnation pressure higher in ratio L/D = 2 for velocities 200 m/s and 300 m/s.
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References
- Allan, J. R. (2000) The costs of bird strikes and bird strike prevention. In Human conflicts with wildlife: Econonomic considerations (pp. 147-153). Lincoln, NE: USDA National Wildlife Research Center Symposia.
- Sebastian Heimbs (2011) Bird Strike Analysis in Aircraft Engineering: An Overview. Advances in Mechanical Engineering Research, Vol 3. Nova Science Publishers, Inc.
- SIMULIA, A strategy for bird strike simulations using Abaqus/Explicit. Dassault Sytemes,
- J.P. Barber, H.R. Taylor, J.S. Wilbeck, Bird impact force and pressures on rigid and compliant target. Technical Report AFFDL-TR-77-60, Air Force Flight Dynamics Laboratory, 1978.
- J.S. Wilbeck, Impact behavior of low strength projectiles. Technical Report AFML-TR-77-134, Wright-Patterson
- Air Force Base, 1978.
- J.S. Wilbeck, J.P. Barber, Impact bird loading, The Shock and Vibration Bulletin 48, 2 (1978) 115-122.
References
Allan, J. R. (2000) The costs of bird strikes and bird strike prevention. In Human conflicts with wildlife: Econonomic considerations (pp. 147-153). Lincoln, NE: USDA National Wildlife Research Center Symposia.
Sebastian Heimbs (2011) Bird Strike Analysis in Aircraft Engineering: An Overview. Advances in Mechanical Engineering Research, Vol 3. Nova Science Publishers, Inc.
SIMULIA, A strategy for bird strike simulations using Abaqus/Explicit. Dassault Sytemes,
J.P. Barber, H.R. Taylor, J.S. Wilbeck, Bird impact force and pressures on rigid and compliant target. Technical Report AFFDL-TR-77-60, Air Force Flight Dynamics Laboratory, 1978.
J.S. Wilbeck, Impact behavior of low strength projectiles. Technical Report AFML-TR-77-134, Wright-Patterson
Air Force Base, 1978.
J.S. Wilbeck, J.P. Barber, Impact bird loading, The Shock and Vibration Bulletin 48, 2 (1978) 115-122.
