ANALISIS KESTABILAN DINAMIK SAYAP PESAWAT GLIDER GL-1 MENGGUNAKAN PENDEKATAN METODE ELEMEN HINGGA

• Main Author: Khoirun Nisa, Anis
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/34905
• Institution: Institut Teknologi Bandung

Glider or sailplane aircraft are often used for gliding sports. The aircraft that analyzed in this final project are Glider GL-1 aircraft which are currently being carried out research and development in Indonesia. The aircraft has a wing with a high aspect ratio. One of the aeroelastic problem of this kind of aircraft, is flutter. To meet the needs of certification, the process design of these aircraft must meet the existing regulations. Regulations of flutter on sailplane aircraft are listed in EASA CS 22. It stated that the aircarft may not experience flutter. For the purposes of the design process, a structure analysis on the GL-1 aircraft’s wing that made from composite was doing by finite element method approach. Calculation of aerodynamic force distribution using the Doublet-Lattice method, while flutter analysis is carried out using the P-K method. The analysis was carried on two types of models, the clean wing model and the wing with aileron model. The effect of various parameter were examined and observed on the flutter speed. The parameter which varried are the type of material, stiffness of the rod aileron, and the additional mass of aileron as mass balance, and variations on Mach Number. The results that obtained from this final project are the graphs of speed- frequency plot, and speed-damping number plot. In addition, the flutter velocity data is plotted into the flight envelope, so that the flutter envelope is known from the wing. From the data of flutter envelope, it can be concluded, whether the wing of the aircraft is safe from flutter or not.