alps programs with maestro modeler for ultimate limit ... · alps = nonlinear analysis of large...
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ALPS Programs with MAESTRO Modeler ALPS Programs with MAESTRO Modeler for for
Ultimate Limit State Assessment Ultimate Limit State Assessment of of
Ships and Offshore StructuresShips and Offshore Structures
Jeom Kee Jeom Kee PaikPaikPusan Pusan National UniversityNational University
Ship Structural Mechanics Laboratory
MAESTRO ModelerMAESTRO Modeler
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MAESTRO ModelerMAESTRO Modeler
Volume (tank) loads are appliedas a percentage filled or a specificmass or a head.
MAESTRO ModelerMAESTRO Modeler
ALPS = Nonlinear ALPS = Nonlinear AAnalysis of nalysis of LLarge arge PPlatedlatedSStructures tructures
ALPS/ULSAP = ULS of stiffened panelsALPS/ULSAP = ULS of stiffened panelsALPS/HULL = ULS of ship hulls (progressive)ALPS/HULL = ULS of ship hulls (progressive)ALPS/USAS = ULS of ship hulls (peak value)ALPS/USAS = ULS of ship hulls (peak value)ALPS/TRAAS = Risk assessment of ship hullsALPS/TRAAS = Risk assessment of ship hullsALPS/SCOL = Collision analysisALPS/SCOL = Collision analysisALPS/GENERAL = ULS of general plated ALPS/GENERAL = ULS of general plated strustru..
ALPSALPS
Ship Structural Mechanics Laboratory
▪▪ Unstiffened Unstiffened plates, plates, uniuni--axially stiffened panels, grillagesaxially stiffened panels, grillages(cross(cross--stiffened panels)stiffened panels)▪▪ Steel, aluminumSteel, aluminum▪▪ Any combination of longitudinal compression /Any combination of longitudinal compression /tension, transverse compression / tension, edge shear,tension, transverse compression / tension, edge shear,longitudinal longitudinal inplane inplane bending, transverse inbending, transverse in--planeplanebending, lateral pressurebending, lateral pressure▪▪ Impact pressure action arising from sloshing, slamming,Impact pressure action arising from sloshing, slamming,
green seas green seas
▪▪ Aged related damage Aged related damage –– corrosion (general or pitting), cracking,corrosion (general or pitting), cracking,local dentinglocal denting
▪▪ Initial imperfections Initial imperfections –– initial deflection, residual stressinitial deflection, residual stress
ALPS/ULSAPALPS/ULSAP
Ship Structural Mechanics Laboratory
▪▪ Progressive collapse analysis of ship hulls until and after ULSProgressive collapse analysis of ship hulls until and after ULSis reachedis reached
▪▪ Steel, aluminumSteel, aluminum▪▪ Any combination of vertical bending, horizontal bending,Any combination of vertical bending, horizontal bending,
sectional shear, torsionsectional shear, torsion▪▪ Lateral pressure effect on panel levelLateral pressure effect on panel level▪▪ New ship hulls without damageNew ship hulls without damage▪▪ AAged ship hulls with corrosion (general/pitting), crack, dentged ship hulls with corrosion (general/pitting), crack, dent▪▪ Damaged ship hulls after collision, grounding, fire, explosionDamaged ship hulls after collision, grounding, fire, explosion▪▪ Initial imperfections Initial imperfections –– initial deflection, residual stressinitial deflection, residual stress
ALPS/HULLALPS/HULL
Ship Structural Mechanics Laboratory
▪▪ Risk assessment of ship hulls against hull girder breakageRisk assessment of ship hulls against hull girder breakage▪▪ Steel, aluminumSteel, aluminum▪▪ Under vertical bendingUnder vertical bending▪▪ New ship hulls without damageNew ship hulls without damage▪▪ AAged ship hulls with corrosion (general/pitting), crack, dentged ship hulls with corrosion (general/pitting), crack, dent▪▪ Damaged ship hulls in collision, grounding, fire, explosionDamaged ship hulls in collision, grounding, fire, explosion▪▪ ShortShort--term response of hull girder loads as a function ofterm response of hull girder loads as a function ofsea states (sea wave height, storm persistence duration) andsea states (sea wave height, storm persistence duration) andoperational condition (ship operating speed) operational condition (ship operating speed)
ALPS/TRAASALPS/TRAAS
Ship Structural Mechanics Laboratory
ALPS/HULL Application - FrigateALPS/HULL Application - Frigate
Ship Structural Mechanics Laboratory
ALPS/HULL Application – Collapse Mode ChangeALPS/HULL Application – Collapse Mode Change
ALPS/HULL Application – Collapse Mode ChangeALPS/HULL Application – Collapse Mode Change
ALPS/HULL Application – Collapse Mode ChangeALPS/HULL Application – Collapse Mode Change
ALPS/HULL Application – Collapse Mode ChangeALPS/HULL Application – Collapse Mode Change
ALPS/HULL Application – Collapse Mode ChangeALPS/HULL Application – Collapse Mode Change
ALPS/HULL Application - FrigateALPS/HULL Application - Frigate
Ship Structural Mechanics Laboratory -5.0E-006 -4.0E-006 -3.0E-006 -2.0E-006 -1.0E-006 0.0E+000
CURVATURE (1/mm)
-1.2E-002
-1.0E-002
-8.0E-003
-6.0E-003
-4.0E-003
-2.0E-003
0.0E+000
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RTI
CA
L B
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DIN
G M
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T (G
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)British NavyALPS/HULL
1/3 scaled frigate ship model under sagging