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7/27/2019 Aircraft Structural Analysis (Omar) -
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Aerospace Engineering Department
KFUPM
Aircraft Structural Analysis
by
Dr. Hanafy Omar
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Function of the Aircraft Structure
The basic functions of an aircrafts structure are to
Resist the applied loads
Provide the aerodynamic shape
Protect passengers, payload, systems, etc from the
environmental conditions encountered in the flight
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Aircraft Structure Components
1. Wing
2. Fuselage
3. Empennage (Vertical and Horizontal Tail)
4. Under Carriage (Landing Gear)
5. Engine MountsWing
Fuselage
Under Carriage
Vertical Tail
Horizontal Tail
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stringer
Frame
Skin
Internal Aircraft Structural Components
Fuselage
For the conventional fuselage, the major
structural elements are:
Transverse Frame
Longitudinal Stringers
Longerons (primary stringers)
Skin
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Internal Aircraft Structural Components
Wing
For the conventional wing, the major
structural elements are:
Spars (transmitting most of the
bending load arising from the
aircraft weight)
Ribs (defines the aerodynamic
shape of the wing)
Skin
Empennage has the same
structure as Wing
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Stress
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Shear Stress
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Finite Element Analysis
Node
Element
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Two Dimensional Elements
2D plate elements are used to model thin structural members
such as aircraft fuselage skin
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Aircraft Wing Modal Analysis
Using Ansys
Ansys Model
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Aircraft Wing Modal Analysis using Ansys
First Mode Third ModeSecond Mode
Fourth Mode Fifth Mode
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Questions