Analysis of fuselage frames using

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Lecture 7 Analysis of fuselage frames using the
force method
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FUSELAGE FRAMES
Airbus A300
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FUSELAGE FRAMES - SURVIVABILITY
Boeing 737, Aloha Flight 243
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FUSELAGE FRAMES
Airbus Beluga
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FUSELAGE FRAMES
Antonov An-225
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FUSELAGE FRAMES
Airbus A380
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FUSELAGE FRAME LOADS
Typical loads acting on the fuselage frame are -
distributed load due to inside pressure -
concentrated forces - bending moments from
wings - distributed shear load to balance shear
forces.
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FUSELAGE FRAMES ANALYSIS
When analysing fuselage frames, one must remember
about - the usage of symmetry and
anti-symmetry - internal pressure could be
studied separately, basing on superposition
pronciple - the internal statical indeterminacy
due to the closed contour cc number of closed
contours (cells)
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METHODS TO ANALYSE FUSELAGE FRAMES
Small degree of statical indeterminacy
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Force method
Slope-deflection method
Slope-deflection method in matrix formulation
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Numerical methods
Large degree of statical indeterminacy
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EXAMPLE OF FORCE METHOD APPLICATION
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FLOWCHART OF SOLUTION USING FORCE METHOD
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EXAMPLE OF FORCE METHOD APPLICATION
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EXAMPLE OF FORCE METHOD APPLICATION
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EXAMPLE OF FORCE METHOD APPLICATION
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EXAMPLE OF FORCE METHOD APPLICATION (NUMERICAL
SOLUTION)
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EXAMPLE OF FORCE METHOD APPLICATION 2
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EXAMPLE OF FORCE METHOD APPLICATION 2 (NUMERICAL
SOLUTION)
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EXAMPLE OF FORCE METHOD APPLICATION 3
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EXAMPLE OF FORCE METHOD APPLICATION 3 (NUMERICAL
SOLUTION)
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WHERE TO FIND MORE INFORMATION?
For force method, I recommend Kassimali.
Structural Analysis. 3rd ed. 2005 Chapter 13 For
fuselage frames, go to Megson. An Introduction
to Aircraft Structural Analysis. 2010 Chapter 5
Internet is boundless
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TOPIC OF THE NEXT LECTURE
Displacement methods
All materials of our course are available at
department website k102.khai.edu 1. Go to the
page ?????????? 2. Press Structural Mechanics
(lecturer Vakulenko S.V.)
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