Articles

Found 4 Documents
Search

Analysis Numerical Discontinuity of Thin Walled Tube Subjected Low Velocity Impact Rabeta, Bismil; Sitompul, Sahril Afandi
SENATIK STT Adisutjipto Vol 4 (2018): Transformasi Teknologi untuk Mendukung Ketahanan Nasional [ ISBN 978-602-52742-0-6 ]
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Original Source | Check in Google Scholar | Full PDF (554.408 KB)

Abstract

Accident of some countries that have high gross domestic product (GDP) significantly increasing[1]. This event cause fatal for passengers especially if there an accident on the front vehicle[3]. Therefore, the main aspects of car design are very important, one of them is  crash box. Crash boxes are designed to absorb impact energy due to collisions through progressive buckling. In the crushing box design, the tube can be given continuity in the form of a circular hole that has been carried out by previous researchers which provides a deceleration at the safety level on passenger body. In this study a numerical analysis conducted using tube with ellipse discontinuity by varying the ratio of ellipse hole in the crushing box to D/b ratio 0.0, 0.2, 0.3, 0.5. The results of this study found that the tube with D/b 0.0 has the highest peak  force than the other ratio.
ANALISIS PERFORMA ENGINE MARCHETTI SF 260 Rabeta, Bismil
JTK: JURNAL TEKNOLOGI KEDIRGANTARAAN Vol 4, No 2 (2019): JURNAL TEKNOLOGI KEDIRGANTARAAN
Publisher : JTK: JURNAL TEKNOLOGI KEDIRGANTARAAN

Show Abstract | Original Source | Check in Google Scholar | Full PDF (831.627 KB)

Abstract

The Aerospace Air Marshal Surydarma University   (Unsurya) is a college   of movement in aerospace technology that attempts to contribute and information related to aviation technology. One of the facilities owned by Unsurya is the Marchetti SF-260 aircraft which is used as a practice facility for implementing ground run-up engine tests. As long as this aircraft is in Unsurya, no one has ever tried to analyze the engine's performance. Therefore in this study do an analysis of the performance of the marchetti aircraft SF-260 was carried out using the Lycoming O-540 E4A5 engine to determine engine torque, engine power and mechanical efficiency varied by cruising altitude. From the results of the analysis it was found that the highest value at torque was 480.24 Nm, engine power 182 BHP and mechanical efficiency 42.83% obtained at an altitude of 10,000 ft.
Analisis Linear Statik Pada Vertical Tail dengan Variasi Defleksi Rudder Rabeta, Bismil; Arifin, Mufti; Fairuza, Syarifah
JTK: JURNAL TEKNOLOGI KEDIRGANTARAAN Vol 2, No 2 (2017): JURNAL TEKNOLOGI KEDIRGANTARAAN
Publisher : JTK: JURNAL TEKNOLOGI KEDIRGANTARAAN

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1200.688 KB)

Abstract

Desain ekor vertikal pada pesawat sangat beragam bentuknya, bergantung pada karakteristik dan fungsinya. Pada ekor vertikal tersambung rudder yang merupakan control surface pada sumbu vertikal dengan gerakan menggeleng (yaw). Penulisan tugas akhir ini bertujuan untuk menganalisa beban aerodinamis pada ekor vertikal dengan defleksi rudder yang berbeda. Material yang digunakan pada pemodelan adalah aluminium alloy 7075-T6, merupakan paduan dari zinc dan copper. Pemodelan ekor vertikal dan analisa perhitungan dilakukan menggunakan pendekatan elemen hingga dengan bantuan software solidworks 2016. Dengan menggunakan menu flow simulation dan simulation pada solidworks, dapat diketahui output berupa stress, strain, displacement, dan safety factor. Dari hasil yang didapat distribusi stress dan strain memiliki nilai maksimal pada daerah hinge dan  nilai minimal  terjadi pada root leading edge dari ekor vertikal. Nilai stress maksimal pada pemodelan semakin meningkat seiring bertambah besarnya defleksi rudder yang diberikan, tetapi tidak melebihi yield strength dari material yang digunakan.
ANALISIS NUMERIK DISTRIBUSI TEKANAN & KECEPATAN ALIRAN UDARA PADA FUSELAGE B737-9 MAX Susilo, Tri; Rabeta, Bismil; Falah, Fikry
JTK: JURNAL TEKNOLOGI KEDIRGANTARAAN Vol 4, No 2 (2019): JURNAL TEKNOLOGI KEDIRGANTARAAN
Publisher : JTK: JURNAL TEKNOLOGI KEDIRGANTARAAN

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1127.078 KB)

Abstract

Aerodynamic characteristics can be known by using computational Fluid Dynamics (CFD) methods. This study analyzes the pressure distribution and velocity of air flow on Fuselage B737-9 MAX using the Computational Fluid Dynamics (CFD) method with variations in attack angles of 0o, 15o, 30o and 45o. The results obtained are at 0o attack angle, 15o the difference in speed and pressure is not too significant or normal, while at the attack angle 30o and 45o the difference in speed and pressure is very significant or abnormal because the air flow at that angle experiences turbulence around the fuselage.