Submarine Evacuation System for Offshore Structures
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Submarine Evacuation System for Offshore Structures March 6, 2014 Client: Dr. Michael Hinchey Group Name: LifeSub Engineering Group Number: M14 Group Members: Ajanthan Asokan William Barkhouse Matthew Browne Stephen Handrigan
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Submarine Evacuation System for Offshore Structures. Client: Dr. Michael Hinchey. Agenda. Project Overview Prototype Design Evolution Structural Material Control Analysis Lifting Finite Element Analysis (FEA) Motion (Flow3D) Control Codes & Sequence Testing Methods - PowerPoint PPT Presentation
Transcript of Submarine Evacuation System for Offshore Structures
Submarine Evacuation System for Offshore Structures
March 6, 2014
Client: Dr. Michael Hinchey
Group Name:LifeSub Engineering
Group Number: M14
Group Members:
Ajanthan Asokan
William Barkhouse
Matthew Browne
Stephen Handrigan
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AgendaProject OverviewPrototype Design
Evolution Structural Material Control
Analysis Lifting Finite Element Analysis (FEA) Motion (Flow3D)
Control Codes & SequenceTesting MethodsDeployment StrategiesMoving ForwardQuestionsMarch 6, 2014
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Project Overview
March 6, 2014
Current Problem Lifeboats – Exposed to Hazards Freefall – Uncontrolled
Proposed Solution Deployable Submarine
Project GoalsDevelop and Test Automated
Submarine PrototypeDevelop and Test Deployment
Options Identify Design RequirementsProve Operational ViabilityMake Recommendations on Full-
scale Development
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Prototype Design Evolution
March 6, 2014
StructuralLifting HookTail SweepPropeller Shroud
MaterialPrevious – 6” OD
Aluminum Round StockCurrent
Hull – 6” ID, PVC Pipe Endcaps – Solid Round
Stock ABS Shroud – RP ABS
Phase 1
Phase 2
Prototype Design Evolution
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ControlsExperimental Circuit (Breadboard)
Initial code testingPrinted Circuit Board (PCB)
Fine-tuning with prototype equipment Execute submarine control
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Analysis: Lifting
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Applied Load: 125 (N)
Maximum Lift Acceleration: 1 (m/s2)
Lifting Hook – ¼” x 20 UNC Nylon
Maximum Stress due to Bending
Lifting Angle Limit: 10° (S.F. 2)
Torque Requirement: 1 (N-m)
End Cap Fasteners - 4 x ¼ x 28 UNC Nylon
Utilization: 2% of Yield Strength
Torque Requirement: 1 (N-m)
10°
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Finite Element Analysis (FEA)Quarter Model Hydrostatic Analysis
Boundary ConditionsRoller Side BoundariesFixed at Nose
SetupPressure: 60 kPa (~6m)Mesh: 6mm curvature
ResultsLimiting Safety Factor: 11.47Max Deflection: 35.2 µm
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MIN: 11.47 S.F.
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Motion Analysis: Flow3D
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ConditionsPreset amount of ballastFully submergedStill waterExclude buoyancy controlUniform density
SetupAcceleration: 0.1 m/s2 downwardsDisp. Mass: 11.2 kg; Mass: 11.31 kgHollow body with point mass
Result: COG ~10mm below COB
4 ft
5.2 ft
2.8 ft
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Motion Analysis: Flow3D
March 6, 2014
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Control Codes
March 6, 2014
Speed Control CodeVarying thruster
RPM
Depth Control CodeMaintain desired
depth band
Roll & Pitch CodeContinual monitoring
of roll and pitch
PotentiometerReplicates sensor
ThrusterReplicates
thruster± 2.5 V
Stepper MotorReplicates PumpBallast Control
Code Sequence
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+ θ
- θ
+ Φ
- Φ
Z2
Z1
+ Z
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Testing Methods
March 6, 2014
Static CommissioningWater Tight Hull TestExternal Ballast System
Pressure Test
Dynamic CommissioningDepth Driven Ballast TestRotation Driven Thrust
Test Pitch Roll Depth
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Deployment Strategies
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1. Vertical Deployment Propeller-down launch Underwater Avoid GBS interference
2. Horizontal Launch Release bay filled with
water Exit from enclosed
piping
3. Horizontal Docking Connect with GBS
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2.
3.
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Moving ForwardRefine Flow3D Model using an upgraded version of
Flow3D
Complete construction and fabrication
Continue optimizing control codes
Perform testing and analysis
Phase 3 Decision: Develop general recommendations for full-scale
implementation
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Questions?
March 6, 2014
Thank-youwww.lifesubengineering.weebly.com
