Finite Element Analysis of an Aircraft Wing *ByAJAY KUMAR.RNOKESHBABU.YSATHISVISWANATHAN.PSURESH RAJ.LB.E, Final Year Aeronautical Engg.Internal guide: Mr.PRABHAKARAN

Designation, Department of Aeronautical Engineering GOJAN SCHOOL OF BUSINESS AND TECHNOLOGYExternal guide:Mr.V.PRABHAKARAN

*Abstract The objective of this project is to analyze the dynamic structural response of an aircraft wing and to simulate it for various boundary conditions. The analysis has been done for different material properties and the comparison between the results has been studied. This report briefly explains the basics of the vibration, finite element method and its application using ANSYS. The analysis is carried out in ANSYS 11.0. The loading conditions are the self weight of the wing. The output extracted is the mode shapes of the wing at different frequencies.

Aero-structural design and analysis of an unmanned aerial vehicle and its mission adaptive wing submitted by ERDOAN TOLGA INSUYU

Aerodynamic and structural design of a small nonplanar wing uav by landolfo, giuseppe in university of dayton

Unmanned air vehicle (uav) wing design and manufacture submitted by chong shao ming

Autonomous vehicle technologies for small fixed-wing uavs randal beard,derek kingston,morgan quigley,deryl snyder,reed christiansen,walt johnson,

Finite element analysis of composite wing for unmanned aerial vehicle based on msc.Nastran YIN XING-YAN,FENG ZHEN-YU,LU xiang(aeronautical engineering college of civil aviation university of china,tianjin 300300,china)

Literature survey

Nusyirwan, istas fahrurrazianddahalan, md nizam(2003)using composite materials to fabrication UAV wing.Project report. Universiti teknologi malaysiaproject\Landolfo Giuseppe.pdfproject\CAtxtAppE2.pdfproject\phd_thesis_namgoong.pdfproject\Unmanned air vehile (UAV) wing design and manufacture.pdfproject\index.pdf

*Materials selected and their properties

S.NOMaterialsDensitykg/m3Youngs ModulusGPaPoissons Ratio1.AluminumAL70752810720.332.Titanium 6Al-4V4240 1100.34

NODAL SOLUTIONNodal solution for aluminum Al7075No of modes extracted 25The behavior of the material applied to the wing model is shown below*

Mode1*

Mode2*

Mode3*

Mode4*

Mode5*

Mode6*

Mode7*

Mode8*

Mode9*

Mode10*

Mode11*

Mode12*

Mode13*

Mode14*

Mode15*

Mode16*

Mode17*

Mode18*

Mode19*

Mode20*

Mode21*

Mode22*

Mode23*

Mode24*

Mode25*

Comparison of nodal solution for Aluminum and Titanium*

*Aluminum Titanium

Aluminum Titanium*

*Aluminum Titanium

*Aluminum Titanium

*Aluminum Titanium

*Aluminum Titanium

*Aluminum Titanium

*Aluminum Titanium

*Aluminum Titanium

*Aluminum Titanium

*Aluminum Titanium

*Aluminum Titanium

*Aluminum Titanium

*Aluminum Titanium

*Aluminum Titanium

*

Mode NoFrequencyAluminumTitanium14.81764.7488226.20925.820331.41530.961441.44140.712561.15960.260692.83291.5667104.64103.128112.08110.569114.44113.1010119.45118.0411125.90124.4112126.89125.2513130.42128.86

*

ModeNoFrequencyAluminumTitanium14162.15159.9715165.16163.1716168.08165.5317179.13176.5018205.65202.8319208.00205.5020219.30216.6621226.15223.4522230.20227.4123233.81231.0224239.00236.2725239.67236.91

To be continued*

*

*

*

*

*

*

*

Mode No.Frequency112.988261.034382.1684127.6505236.2006344.2207384.8408480.7709540.02010650.570

*

*

*

*

*

*Experimental modal analysis9. How many points are enough when running a modal test?A sufficient number of points to uniquely identify the mode is necessary.

*

*

*

Modal analysis is a process of describing a structure in terms of its natural characteristics of its dynamic properties frequency, damping and mode shapes.Modal analysisis the study of the dynamic properties of structures undervibrationalexcitation.Frequency Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency. The period is the duration of one cycle in a repeating event, so the period is the reciprocal of the frequency.Damping damping is any effect that tends to reduce the amplitude of oscillations in an oscillatory system.Mode Shapes a mode shape describes the expected curvature (or displacement) of a surface vibrating at a particular mode. To determine the vibration of a system, the mode shape is multiplied by a function that varies with time, thus the mode shape always describes the curvature of vibration at all points in time, but the magnitude of the curvature will change. The mode Shape is dependent on the shape of the surface as well as the boundary conditions of that surface.

*Modal Analysis

***