Simulasi Numerik Batas Kecepatan Flutter dan Divergence pada Sayap (Wingbox) Pesawat N219

Wardhana, Muhammad Arsa Kusuma (2026) Simulasi Numerik Batas Kecepatan Flutter dan Divergence pada Sayap (Wingbox) Pesawat N219. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5007221002-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (5MB) | Request a copy

Abstract

Flutter dan divergence merupakan fenomena aeroelastik yang dapat menyebabkan instabilitas struktur sayap pesawat apabila terjadi pada kondisi operasi tertentu. Penelitian ini bertujuan untuk menentukan kecepatan terjadinya flutter dan divergence pada wingbox sayap kanan pesawat N219 serta mengevaluasi keamanannya terhadap flight envelope pesawat. Analisis dilakukan menggunakan metode PK No Looping (PKNL) yang dikombinasikan dengan pendekatan aerodinamika Doublet Lattice Method (DLM). Model struktur wingbox dibangun berdasarkan geometri dan properti material pesawat N219, kemudian dimodelkan dalam bentuk stick model dan Aeromodel untuk memperoleh karakteristik aeroelastik pada rentang Mach number 0,3–0,5. Hasil simulasi menunjukkan bahwa flutter terjadi pada Mode 4 yang merupakan kombinasi deformasi bending–torsion, sedangkan divergence terjadi pada Mode 1 yang didominasi oleh deformasi lentur. Flutter speed menurun dari 409,67 m/s pada Mach 0,3 menjadi 386,00 m/s pada Mach 0,5, sedangkan divergence speed menurun dari 674,58 m/s menjadi 650,50 m/s. Hasil tersebut menunjukkan bahwa peningkatan Mach number menyebabkan batas kestabilan aeroelastik bergeser ke kecepatan yang lebih rendah. Namun, seluruh nilai flutter Boundary dan divergence Boundary masih berada di atas flight envelope pesawat N219, sehingga wingbox sayap kanan pesawat N219 dinyatakan aman terhadap fenomena flutter dan divergence.
======================================================================================================================================
Flutter and divergence are Aeroelastic phenomena that can lead to wing structural instability under certain operating conditions. This study aims to determine the flutter and divergence speeds of the right-wing wingbox of the N219 Aircraft and to evaluate its safety with respect to the Aircraft flight envelope. The analysis was conducted using the PK No Looping (PKNL) method combined with the Doublet Lattice Method (DLM) aerodynamic approach. The wingbox structural model was developed based on the geometry and material properties of the N219 Aircraft and subsequently represented as a stick model and aerodynamic model to obtain its Aeroelastic characteristics within the Mach number range of 0.3–0.5. The Simulation results indicate that flutter consistently occurs in Mode 4, which is characterized by coupled bending–torsion deformation, while divergence occurs in Mode 1, which is dominated by bending deformation. The flutter speed decreases from 409.67 m/s at Mach 0.3 to 386.00 m/s at Mach 0.5, whereas the divergence speed decreases from 674.58 m/s to 650.50 m/s. These results indicate that increasing Mach number shifts the Aeroelastic stability boundaries to lower speeds. Nevertheless, all flutter and divergence boundaries remain above the N219 Aircraft flight envelope, indicating that the right-wing wingbox of the N219 Aircraft is safe against flutter and divergence phenomena within the analyzed operating range.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Aeroelastisitas, DLM, Divergence, Flutter, N219, PKNL, Aeroelasticity
Subjects:	Q Science > QC Physics > QC151 Fluid dynamics T Technology > TA Engineering (General). Civil engineering (General) > TA355 Vibration. T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL671.9 Airplanes--Maintenance and Repair T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL673.F6 Flaps (Airplane)
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Arsa Kusuma Wardhana
Date Deposited:	28 Jul 2026 01:45
Last Modified:	28 Jul 2026 01:45
URI:	http://repository.its.ac.id/id/eprint/138274

Actions (login required)

View Item