Global and Local Structural Analysis and Design using MAESTRO

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Global and Local Structural Analysis and Design
using MAESTRO

• Anteon Corporation - Proteus Engineering Division
• 345 Pier One Road
• Stevensville, MD 21666
• 410-643-7496
• www.proteusengineering.com

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MAESTRO
METHOD for ANALYSIS EVALUATION
and STRUCTURAL
OPTIMIZATION
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MAESTROs Main Capabilities
MAESTRO is a complete ship structural design
system

• Rapid Structural Modeling
• Finite Element Analysis
• Structural Evaluation
• Optimization
• Detailed Stress Analysis

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Rapid Structural Modeling
Modeling is easy and interactive.
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Rapid Structural Modeling
Endpoints are either imported from Fast Ship or
defined in the modeler, the mesh is generated
automatically.
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Rapid Structural Modeling
The structure is easily defined by using the
scantlings, e.g., plate thickness, breadth
between stiffeners, stiffener web flange sizes.
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Rapid Structural Modeling
Virtually all of the structure is easily modeled.
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Rapid Structural Modeling
Individual modules are joined interactively to
create the complete model.
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Finite Element Analysis
MAESTROs finite element analysis will determine
the stresses for the entire ship.
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Structural Evaluation
and then evaluate the entire ship for all of
the different possible failure modes for all
loadcases
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Structural Evaluation
Only those members who have failed can be shown
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Structural Evaluation
And the individual members can then be queried to
determine their adequacy parameters and stresses
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Optimization Tanker midbody
Scantlings x3
Standard Shapes 8664 Cost Units, 11 savings
Cost Units
ABS Scantlings 9708 Cost Units
8477 Cost Units
MAESTRO can then optimize the structure for any
combination of least weight, cost, or vertical
center of gravity
Cycles
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Detailed Stress Analysis
Detailed stress analysis, including both modeling
and loads, is directly linked to the whole ship
model and solution
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Detailed Stress Analysis
allowing the rapid and accurate analysis of
local stress concentrations.
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MAESTRO
Additional Capabilities

• Underwater Shock and Whipping
• Interface with USA shock code
• Collapse Load of Cylinders
• Using APIs Bulletin 2U
• Ultimate Longitudinal Bending Strength
• Using Adamchaks ULTSTR method
• Overall Structure Vibration

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Specification of Loads in MAESTRO

• Lightship mass distribution
• Selfweight, actual or scaled
• Distributed masses (e.g., weight curve)
• Large selected masses (e.g., engines)
• Hydrostatic loads stillwater and waves
• Internal tank fluid mass loads
• Cargo masses (containers bulk cargo)
• Accelerations (6 d.o.f.)
• Pressure loads, actual and design
• Point loads (forces and/or moments)
• External bending moment and shear force at ends
  of partial models

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Overall Failure Modes

• OVERALL STRUCTURE
• Progressive collapse
• Fatigue
• Bending deflection limit
• Bending stress limit
• Static
• Low frequency
• waves, live loads
• Medium frequency
• vibration
• whipping
• slamming
• Transient (via USA)
• U/W shock

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Individual Member Failure Modes

• PANELS
• Collapse
• stiffener flexure
• combined buckling
• membrane yield
• stiffener buckling
• Stiffener yield
• compression, plate flange
• tension, plate flange
• Plate unserviceability
• yield
• transverse bending
• longitudinal bending
• local buckling
• allowable permanent set
• pressure loads
• concentrated loads

• GIRDER
• Collapse
• torsional buckling
• plastic buckling, flange
• plastic buckling, plate
• Yield
• compression, plate flange
• tension, plate flange
• FRAME
• Collapse, plastic hinge
• Yield
• compression, plate flange
• tension, plate flange

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Evaluation of CylindersFailure modes checked
as per API Bulletin 2U
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Examples of MAESTRO Users

• CLASSIFICATION SOCIETIES SAFETY ORGANIZATIONS
• American Bureau of Shipping
• Bureau Veritas
• Canadian Coast Guard
• China Classification Society
• Croatian Register
• Lloyds Register of Shipping
• Polish Register of Shipping
• Registro Italiano Navale (RINa)
• U.S. Coast Guard
• NAVIES
• Australia, Brazil, Canada
• Colombia, Germany,
• India, Italy, Mexico,
• Netherlands, Portugal,
• Turkey, United Kingdom,
• United States

• DESIGNERS RESEARCH ORGANIZATIONS
• CETENA SpA, Italy
• C.R. Cushing, USA
• Designers Planners, USA
• Glosten Associates, USA
• JJMA, USA
• MIT, USA
• MTG, Germany
• Rodriquez, Italy
• VUYK, Netherlands
• SHIPYARDS
• Bath Iron Works
• IZAR
• Fincantieri
• Northrop Grumman

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Applications of MAESTRO

• High Speed Ferries
• Warships
• SWATH Vessels
• Containerships
• Cruise Ships
• High Speed Mega-Yachts
• Bulk Carriers
• Tankers
• Floating Dry Docks
• Barges

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100m Fast Ferry
Photo and model courtesy of Rodriquez
Engineering, Genova, Italy
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Canadian Patrol Frigate
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U.S. Navy AEGIS Cruisers
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Patrol Craft USCG Island Class
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SWATH VesselsCracking Investigation
Y
Y
Z
Z
X
X
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5500 TEU Containership
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Project America - global analysis
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Project America local analyses
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Bulk Carrier Midbody
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44,000 dwt Tanker
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Floating Dry Dockforensic analysis - dock
failed at less than design load
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Single Skin Oil Barge
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• For more information please contact
• Anteon Corporation, Proteus Engineering Division
  345 Pier One Road, Suite 200Stevensville, MD
  21666
• tel [phone]
• fax [phone]
• email maestro_at_anteon.com
• website www.proteusengineering.com