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“IRON DOLPHIN”BIONIC SUBMERSIBLE WATERCRAFT
CHUAN DING, SHIJIAO LI, ZHIHAN WANG
INTRODUCTION
• Recreational undersea exploration• Current options:
Be a diverRide a sightseeing submarine
• Drawbacks of the current optionsDiving: direct exposure to
dangerous marine lifes, need certain training
Sightseeing submarine: Slow speed, designated routes, not welcomed by fishes
http://www.e-biz-travel.com/sight_seeing/bangkok/ebb37.html
OBJECTIVES• Safe to passengers• Design your own adventure• Friendly to marine life• Quick steering• Travels undersea in decent
speed
MODELING• Cabin: seat, dashboard and windshield • Engine: propeller, motor and nozzle•Mechanism: connectors, segmented tail and fins
CABINSub-Assembly
CABIN
Dashboard:
Seat:
Windshield
Seat Brackets
Acrylic Plastic
ENGINEPropeller:Motor: Nozzle: Engine
assembly:
Enigine Connector
CONNECTOR MECHANISM:Major Parts:
Assembled Connector• To be motorized and
programmed • Able to mimic the
movement of a dolphin’s tail for control of direction
• Key part for FEA
FINS:Dorsal fin: Flippers: Flukes
(Tail):
FULL ASSEMBLY:
FEA ANALYSIS• Create 2D mesh• Assign material• Assign boundary conditions• Apply force
FEA ANALYSIS: DORSAL FINComputer FEA Analysis Results:
Applied Constraints and Force:
Material: Aluminum 6061 (density 2.711×10-6 kg/mm3, Young’s Modulus 6.898×107 kPa at 20 degree Celsius)
VERIFICATION: DORSAL FINF
L
1 2
Cantilever Beam Model of Top Fin
Computer FEA Results
Verification Results
0.171mm 0.174 mm
FEA ANALYSIS: UNIVERSAL JOINT YOKE
Computer FEA Analysis Results:
Material: Steel (density 7.829×10-6 kg/mm3, Young’s Modulus 2.0694×108 kPa at 20 degree Celsius)
Fixed on this face
2500 N
2500 N
Mesh Element Size=10 mm
VERIFICATION: UNIVERSAL JOINT YOKE
Spring Element Simplification of the Joint Yoke
1 1 1 1
1 1 2 2
2 2 2 2
0
0
F K K dF K K K K dF K K d
AEKL
Computer FEA Results
Verification Results
4.265×10-4 mm 1.513×10-4 mm
FEA ANALYSIS: UNIVERSAL JOINT
Computer FEA Analysis Results:Material: Alumnum 6061 (density 2.711×10-6 kg/mm3, Young’s Modulus 6.898×107 kPa at 20 degree Celsius)
Mesh element size = 5 mm
2500 N
2500 N
VERIFICATION: UNIVERSAL JOINT
Universal Joint – Schematic Diagram
[𝐹 1𝑦
𝑀 1
𝐹 2𝑦
𝑀 2]=𝐸𝐼
𝐿3 [ 12 6𝐿6𝐿 4𝐿2
−12 6𝐿−6𝐿 2𝐿2
−12 −6𝐿6𝐿 2𝐿2
12 −6𝐿−6𝐿 4 𝐿2 ] [𝑑1𝑦
𝜑1
𝑑2𝑦
𝜑2]
Computer FEA Results
Verification Results
1.055x10-3 mm 2.830x10-4 mm
FLUID DYNAMICS ANALYSIS
FLUID DYNAMICS ANALYSIS
SUMMARY• Most objectives are achieved• FEA analysis verified• Modification to the shape of the nose of cabin needs to
be done to improve overall fluid dynamics
FUTURE WORK• Detailed interior design• FEA on all parts• Improve mass/strength efficiency of parts based on FEA
results
THANK YOU!
Questions?
