Maine Marine Composites LLC: Advanced Engineering Analysis 2 Portland Fish Pier, Suite 211 Portland, ME 04101-4699 Voice: 207.774.9616 Fax: 207.221.1416 Email: info@mainemarinecomposites.com

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

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

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

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

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

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.

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

Creating a Surface Model with Rhino3D

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

“Meshing” for AQWA Analysis

AQWA: Mooring System Analysis

OWC/WEC Analysis Results Resonating OWC: Movie: “ AnsysWBU 2011-08-09 17-54-39-35.avi”

Demonstration Project: Seakeeping Study

Creating a CAD Model Using MultiSurf

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

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

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

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

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

AQWA: Analysis of Research Vessel

AQWA: Mesh of Sportfishing Boat

AQWA Prediction of Wave Forces (Froude-Krylov Forces)

AQWA: Roll Rotation vs. Heading and Wave Frequency

AQWA: Wave Field Oblique Sea, Non-Linear Waves

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

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

Thanks for Listening… Any Questions?