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Application in Finite Element Analysis MAE 5060 Term Semester Project: Finite Element Analysis

Application in Finite Element Analysis MAE 5060 Term Semester Project: Finite Element Analysis Of the FIT Sat III Rocket Carlos Figueredo Lionel Fevre. Presentation Of The Original Model:. Pay Load Section. Stringers. Motor Section. Wing Assembly. Motor = 10 000N.

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Application in Finite Element Analysis MAE 5060 Term Semester Project: Finite Element Analysis

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  1. Application in Finite Element Analysis MAE 5060 Term Semester Project: Finite Element Analysis Of the FIT Sat III Rocket Carlos Figueredo Lionel Fevre

  2. Presentation Of The Original Model: Pay Load Section Stringers Motor Section Wing Assembly Motor = 10 000N

  3. Problem: Structure too weak. Motor plate: Max Stress =213 MPa 2 Stringers at Payload section and Motor section

  4. New Design:

  5. New Design in Details: • Top Housing cut in two • 4 stringers at Payload Section • 8 Stringers above the Motor-Plate • 8 vertical flanges on the Motor-Plate • Wing-Assembly Ring raised up around Motor-Plate • 4 Stringers at Motor Section • Addition of hole patterns (fasteners)

  6. Finite Element Analysis: • Payload Section • Housing Static / Buckling / Modal Analyses • Stringers Static / Buckling / Modal Analyses • Motor Section • Motor PlateStatic / Modal Analyses • Short stringersStatic / Buckling / Modal Analyses • Long Stringers Static / Modal Analyses • Motor Assembly (1/8th)Static / Modal Analyses • Idealization of Complete assemblyModal / Static Analyses

  7. Motor Section • Motor PlateStaticAnalyses VM max: MAX. 13.748 MPa Max Displacement: MAX. 3.86462E-05 [mm]

  8. Motor Section • Motor PlateModalAnalyses The values for the 6 modes frequencies were: Mode #. Freq.(Rad/sec) Freq.(Hertz) Period(Seconds) 1 16130 2567.1 0.00038954 2 16911 2691.4 0.00037155 3 18344 2919.5 0.00034252 4 24651 3923.4 0.00025488 5 26683 4246.7 0.00023548 6 30391 4836.9 0.00020674 Motor load applied for 5 sec:

  9. Fully constrained weld 2500N force • Motor Section • Short StringersStaticAnalyses Max VM = 47 MPa VM = 31 MPa

  10. Motor Section • Short StringersBucklingAnalyses BLF = 0.1028156E+01 Max Displacement

  11. Motor Section • Short StringersModalAnalyses Mode Frequency (Hz) 1 118.3 2 243.1 3 382.2 Natural Frequencies :

  12. Motor Section • Motor AssemblyModal Fix: Z Displacement Mode Frequency (Hz) 1 602.9 2 904.7 3 1043 4 1295 5 1636 6 2289 Symmetric Restraint

  13. Motor Section • Motor AssemblyStatic MAX. 5.856+07 Pa

  14. Complete Rocket Analysis - Modal CPU: 4.5359Kg Plane: 6.8038Kg Wing Assemble: 16.3293Kg Mode Frequency Convergence ---- ------------ ----------- 1 0.000000e+00 0.0% 2 0.000000e+00 0.0% 3 6.484042e-08 0.0% 4 7.989401e-04 4.6% 5 9.185365e-04 5.8% 6 9.255145e-04 6.0% Constrain: Free R Disp. & Th Rotation

  15. Complete Rocket Analysis - Static CPU - Load: 702.52N VM MAX. 0.57542E+07 [Pa] Plane - Load: 1053.77N Symmetric Constrains Constrain: Free R Disp. & Th Rotation Wing Assemble: 2529.03N

  16. QUESTIONS ?

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