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Lecture #7 Analysis of fuselage frames using the force method

Lecture #7 Analysis of fuselage frames using the force method. FUSELAGE FRAMES. Airbus A300. 2. FUSELAGE FRAMES - SURVIVABILITY. Boeing 737, Aloha Flight 243. 3. FUSELAGE FRAMES. Airbus Beluga. 4. FUSELAGE FRAMES. Antonov An-225. 5. FUSELAGE FRAMES. Airbus A380. 6.

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Lecture #7 Analysis of fuselage frames using the force method

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  1. Lecture #7 Analysis of fuselage frames using the force method

  2. FUSELAGE FRAMES Airbus A300 2

  3. FUSELAGE FRAMES - SURVIVABILITY Boeing 737, Aloha Flight 243 3

  4. FUSELAGE FRAMES Airbus Beluga 4

  5. FUSELAGE FRAMES Antonov An-225 5

  6. FUSELAGE FRAMES Airbus A380 6

  7. 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. 7

  8. 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) 8

  9. METHODS TO ANALYSE FUSELAGE FRAMES Small degree of statical indeterminacy  Force method Slope-deflection method Slope-deflection method in matrix formulation  Numerical methods Large degree of statical indeterminacy 9

  10. EXAMPLE OF FORCE METHOD APPLICATION 10

  11. FLOWCHART OF SOLUTION USING FORCE METHOD 11

  12. EXAMPLE OF FORCE METHOD APPLICATION 12

  13. EXAMPLE OF FORCE METHOD APPLICATION 13

  14. EXAMPLE OF FORCE METHOD APPLICATION 14

  15. EXAMPLE OF FORCE METHOD APPLICATION (NUMERICAL SOLUTION) 15

  16. EXAMPLE OF FORCE METHOD APPLICATION #2 16

  17. EXAMPLE OF FORCE METHOD APPLICATION #2 (NUMERICAL SOLUTION) 17

  18. EXAMPLE OF FORCE METHOD APPLICATION #3 18

  19. EXAMPLE OF FORCE METHOD APPLICATION #3 (NUMERICAL SOLUTION) 19

  20. 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 … 20

  21. 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 “Библиотека” 2. Press “Structural Mechanics (lecturer Vakulenko S.V.)” 21

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