1. Maine Marine Composites LLC: Advanced Engineering Analysis
2 Portland Fish Pier, Suite 211
Portland, ME
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2. Who We Are… MMC was founded in 2006 MMC Specializes in:
Four employees, two+ associates
MMC Specializes in:
Engineering analyses of barges, boats, ships
Design, stability, performance, seakeeping
Engineering analyses of offshore energy systems
Hydrokinetic energy systems (waves, tidal – moving water)
Platforms for offshore wind systems
Support vessels for offshore wind systems

3. What We Do: Marine Seakeeping Analyses:
Analyze barge motion for lashing design
Find accelerations, check strength of cargo restraints

4. What We Do: Performance Analysis for High Speed Boats
Develop/Market POWERSEA Time-Domain Simulator
Performance, stability, shock/vibration

5. POWERSEA Navy Project
MMC/SAIC/Combatant Craft validation of POWERSEA results

6. What We Do: Instrumentation for Marine Environment
Measure hydrodynamic loads on moored and fixed structures
Measure shock and vibration on high speed craft
Collect oceanographic data for offshore energy site evaluation
Figure Tekscan A201 Standard FlexiForce® Sensors

7. Demonstration Project: Single-Point Wave Energy Converter
Buoy moves vertically (heave motion)
Air is compressed in center pipe
Drives turbine to create electricity
Efficiency depends on relative heave motion of WEC
If WEC moves up when water goes down, get maximum compression
Design Issues
Mooring system
Sea State Response (RAO)
John Brooke, Vice-President, Engineering Committee on Oceanic Resources, Wave Energy Conversion, 2003.

8. “Typical” Wave Energy Converter (Oscillating Water Column)
University of Wisconsin Madison
Nicole Johnson & Eric Olson. CEE 514: Final Project

9. Creating a Surface Model with Rhino3D

10. Building AQWA Model
Import Rhino3D model (IGES) into ANSYS Design Modeler
Create surfaces, waterline cutplane
Calculate hydrodynamic diffraction using AQWA (potential flow theory)

11. “Meshing” for AQWA Analysis

12. AQWA: Mooring System Analysis

13. OWC/WEC Analysis Results
Resonating OWC:
Movie: “ AnsysWBU avi”

14. Demonstration Project: Seakeeping Study

15. Creating a CAD Model Using MultiSurf

16. Building a Model Boat
Create full-size patterns (“lofting”) of frames and keel from CAD model
Cut parts from marine plywood, glue together
Wrap with Kevlar expanded core material
Cover with 24-oz fiberglass/epoxy, sand, paint
Install radios, motors, machinery, ballast

17. Free-Running Radio-Controlled Model
R/C Model of R/V Hugh R. Sharp, Univ. of Delaware
Twin Schottel Rudderprop propulsors
Forced roll mechanism to test seakeeping
Inertial Measurement Unit (IMU) to capture motion

18. Results of Model Tests Tested bilge-keels, fins of various sizes
Conclusion: Require active roll mitigation system

19. Model Test Results Tests in Casco Bay: Movie: “ModelRollOcean1.avi”

20. Using ANSYS AQWA for Seakeeping
Create MultiSurf/Rhino3D model of R/V Hugh R. Sharp

21. AQWA: Analysis of Research Vessel

22. AQWA: Mesh of Sportfishing Boat

23. AQWA Prediction of Wave Forces (Froude-Krylov Forces)

24. AQWA: Roll Rotation vs. Heading and Wave Frequency

25. AQWA: Wave Field
Oblique Sea, Non-Linear Waves

26. AQWA Seakeeping Results
Destroyer in Following Sea
Movie: “ BulbousBowFollowingSea.avi”
Sportfishing Boat in Quartering sea
Movie: “ RegularQuarterBeamHead.avi”

27. Conclusions
ANSYS software tools can be used to solve real-world problems in the marine industry
MMC offers advanced design and analysis services
Experienced with sophisticated analysis tools
Expertise in hydrodynamics, marine design and analysis

28. Thanks for Listening…
Any Questions?