Offshore Engineering Ontology

AI SEARCH FLOW ALGEBRA
OFFSHORE ENGINEERING ONTOLOGY
Kireth Semantic Research Archive

AUTHORS
Mark Anthony Higgins — Sky (Recursive AI)

SOURCE
https://kirethresearch.org/booksai-core/ontologies/engineering-ontologies/marine-engineering/offshore-engineering-ontology.html

FLOW "OffshoreEngineeringOntology" v4.0

DOMAIN := ENGINEERING_ONTOLOGIES / MARINE_ENGINEERING / OFFSHORE_ENGINEERING
ONTOLOGY := OFFSHORE_ENGINEERING_ONTOLOGY

OFFSHORE_ENGINEERING :=
  OFFSHORE_STRUCTURE + ENVIRONMENTAL_LOADING + HYDRODYNAMICS
  + FOUNDATION + MOORING + RISER + PIPELINE + TOPSIDE_SYSTEM
  + INSTALLATION + INTEGRITY + OPERATIONS + SAFETY

PURPOSE :=
  CHARACTERISE_SITE -> DEFINE_ENVIRONMENT -> SELECT_STRUCTURE
  -> MODEL_LOADS -> DESIGN_FOUNDATION_OR_MOORING
  -> INTEGRATE_RISERS_AND_PIPELINES -> INTEGRATE_TOPSIDES
  -> INSTALL -> OPERATE -> MONITOR -> MAINTAIN -> PROTECT

# ---------- CORE ENTITIES ----------
ENTITY OffshoreSystem
ENTITY OffshoreStructure
ENTITY FixedPlatform
ENTITY FloatingPlatform
ENTITY JacketPlatform
ENTITY GravityBasedStructure
ENTITY SemiSubmersible
ENTITY Spar
ENTITY FloatingProductionSystem
ENTITY OffshoreWindStructure
ENTITY Seabed
ENTITY Foundation
ENTITY Pile
ENTITY Anchor
ENTITY MooringSystem
ENTITY MooringLine
ENTITY Riser
ENTITY Pipeline
ENTITY SubseaSystem
ENTITY TopsideSystem
ENTITY Deck
ENTITY ProcessEquipment
ENTITY Wave
ENTITY Current
ENTITY Wind
ENTITY Tide
ENTITY WaterDepth
ENTITY HydrodynamicLoad
ENTITY WindLoad
ENTITY WaveLoad
ENTITY CurrentLoad
ENTITY StructuralLoad
ENTITY Fatigue
ENTITY Corrosion
ENTITY MarineGrowth
ENTITY IntegrityManagement
ENTITY Installation
ENTITY Inspection
ENTITY Maintenance
ENTITY SafetySystem
ENTITY EmergencyShutdown

# ---------- OFFSHORE SYSTEM STRUCTURE ----------
OffshoreSystem
  -> contains_or_connects -> OffshoreStructure
  -> may_connect_to -> Seabed
  -> may_include -> Foundation
  -> may_include -> MooringSystem
  -> may_include -> Riser
  -> may_include -> Pipeline
  -> may_include -> SubseaSystem
  -> may_include -> TopsideSystem
  -> protected_by -> SafetySystem

# ---------- STRUCTURE CLASSIFICATION ----------
OFFSHORE_STRUCTURE_TYPE :=
  FIXED_STRUCTURE
  | FLOATING_STRUCTURE
  | SUBSEA_STRUCTURE

FIXED_STRUCTURE :=
  JacketPlatform
  | GravityBasedStructure
  | FIXED_OFFSHORE_WIND_FOUNDATION

FLOATING_STRUCTURE :=
  SemiSubmersible
  | Spar
  | FLOATING_PRODUCTION_SYSTEM
  | FLOATING_OFFSHORE_WIND_PLATFORM

OffshoreStructure
  -> selected_for -> WATER_DEPTH
  + ENVIRONMENT
  + FUNCTION
  + SEABED_CONDITION
  + INSTALLATION_CONSTRAINT

# ---------- SITE CONDITIONS ----------
OFFSHORE_SITE :=
  WATER_DEPTH
  + SEABED
  + WAVE_CLIMATE
  + CURRENT_CLIMATE
  + WIND_CLIMATE
  + TIDE
  + TEMPERATURE
  + CORROSIVE_ENVIRONMENT

WaterDepth
  -> influences -> StructureSelection
  -> influences -> RiserDesign
  -> influences -> MooringDesign
  -> influences -> InstallationMethod

Seabed
  -> characterised_by -> SOIL_TYPE
  + STRENGTH
  + STIFFNESS
  + SLOPE
  + SCOUR_POTENTIAL

# ---------- ENVIRONMENTAL LOADING ----------
ENVIRONMENTAL_LOAD :=
  WaveLoad
  + CurrentLoad
  + WindLoad
  + TIDAL_LOAD
  + ICE_LOAD_IF_APPLICABLE

OffshoreStructure
  -> subject_to -> ENVIRONMENTAL_LOAD

Wave
  -> generates -> WaveLoad

Current
  -> generates -> CurrentLoad

Wind
  -> generates -> WindLoad

TOTAL_DESIGN_LOAD :=
  DEAD_LOAD
  + LIVE_LOAD
  + ENVIRONMENTAL_LOAD
  + OPERATIONAL_LOAD
  + ACCIDENTAL_LOAD

# ---------- HYDRODYNAMICS ----------
HYDRODYNAMIC_RESPONSE :=
  STRUCTURE_GEOMETRY
  + WAVE
  + CURRENT
  + WATER_PROPERTIES
  -> FORCE
  + MOMENT
  + MOTION

HydrodynamicLoad
  -> influences -> StructuralResponse

FLOATING_RESPONSE :=
  SURGE + SWAY + HEAVE + ROLL + PITCH + YAW

FloatingPlatform
  -> exhibits -> FLOATING_RESPONSE

# ---------- FIXED STRUCTURES ----------
FixedPlatform
  -> transfers -> LOAD
  -> through -> Foundation
  -> to -> Seabed

JacketPlatform
  -> subtype_of -> FixedPlatform
  -> may_use -> Pile

Pile
  -> transfers -> AXIAL_LOAD
  + LATERAL_LOAD
  + MOMENT
  -> into -> Seabed

# ---------- GRAVITY STRUCTURES ----------
GravityBasedStructure
  -> supported_by -> SEABED_CONTACT
  -> resists -> OVERTURNING
  + SLIDING
  + BEARING_FAILURE

FOUNDATION_STABILITY :=
  BEARING_CAPACITY
  + SLIDING_RESISTANCE
  + OVERTURNING_RESISTANCE

# ---------- FLOATING STRUCTURES ----------
FloatingPlatform
  -> supported_by -> Buoyancy
  -> restrained_by -> MooringSystem

FLOATING_EQUILIBRIUM :=
  BUOYANCY
  + MOORING_REACTION
  =
  WEIGHT
  + ENVIRONMENTAL_LOADS

IF EnvironmentalLoad changes
THEN FloatingOffset -> REASSESS

# ---------- MOORING ----------
MooringSystem
  -> contains -> MooringLine
  -> connects -> FloatingPlatform
  -> to -> Anchor

MooringLine
  -> develops -> TENSION

MOORING_CONFIGURATION :=
  CATENARY
  | TAUT
  | SEMI_TAUT
  | TENDON

MooringSystem
  -> limits -> PLATFORM_OFFSET
  -> influences -> PLATFORM_MOTION

IF MooringLineFailure occurs
THEN RemainingMooringLoads -> REASSESS

# ---------- ANCHORS ----------
Anchor
  -> transfers -> MooringLoad
  -> to -> Seabed

ANCHOR_TYPE :=
  DRAG_EMBEDMENT
  | SUCTION_PILE
  | DRIVEN_PILE
  | GRAVITY_ANCHOR
  | OTHER_ENGINEERED_ANCHOR

AnchorCapacity
  -> depends_on -> SOIL_PROPERTIES
  + GEOMETRY
  + LOAD_DIRECTION

# ---------- RISERS ----------
Riser
  -> transports -> FLUID
  -> between -> SEABED_SYSTEM
  + SURFACE_SYSTEM

RISER_TYPE :=
  STEEL_CATENARY_RISER
  | FLEXIBLE_RISER
  | TOP_TENSIONED_RISER
  | LAZY_WAVE_RISER

Riser
  -> subject_to -> INTERNAL_PRESSURE
  + EXTERNAL_PRESSURE
  + TENSION
  + BENDING
  + FATIGUE
  + HYDRODYNAMIC_LOAD

# ---------- PIPELINES ----------
Pipeline
  -> transports -> FLUID_OR_ENERGY
  -> along -> SEABED_OR_BURIED_ROUTE

PIPELINE_DESIGN :=
  INTERNAL_PRESSURE
  + EXTERNAL_PRESSURE
  + TEMPERATURE
  + ROUTE
  + SOIL_INTERACTION
  + FREE_SPAN
  + BUCKLING
  + CORROSION

Pipeline
  -> may_require -> STABILISATION
  + PROTECTION
  + CORROSION_CONTROL

# ---------- SUBSEA SYSTEMS ----------
SubseaSystem
  -> may_contain -> WELLHEAD
  + MANIFOLD
  + VALVE
  + CONTROL_MODULE
  + CONNECTOR

SubseaSystem
  -> interfaces_with -> Riser
  + Pipeline
  + TopsideSystem

# ---------- TOPSIDES ----------
TopsideSystem
  -> supported_by -> OffshoreStructure
  -> contains -> ProcessEquipment
  -> contains -> Utilities
  -> contains -> ControlSystem
  -> contains -> SafetySystem

Deck
  -> supports -> TopsideSystem

TOPSIDE_LOAD :=
  EQUIPMENT_WEIGHT
  + OPERATING_LOAD
  + PERSONNEL_LOAD
  + STORAGE_LOAD

# ---------- OFFSHORE WIND ----------
OffshoreWindStructure
  -> supports -> WIND_TURBINE

OFFSHORE_WIND_FOUNDATION :=
  MONOPILE
  | JACKET
  | GRAVITY_BASE
  | FLOATING_FOUNDATION

OffshoreWindStructure
  -> subject_to -> WIND_LOAD
  + WAVE_LOAD
  + CURRENT_LOAD
  + TURBINE_DYNAMIC_LOAD

# ---------- FATIGUE ----------
Fatigue
  -> caused_by -> CYCLIC_STRESS

FATIGUE_SOURCE :=
  WAVES
  | WIND
  | VORTEX_INDUCED_VIBRATION
  | MACHINERY
  | OPERATIONAL_CYCLES

FatigueDamage
  -> accumulates_over -> TIME

IF CyclicStressRange increases
THEN FatigueDamageRate -> MAY_INCREASE

# ---------- CORROSION ----------
Corrosion
  -> degrades -> MATERIAL_THICKNESS
  -> reduces -> StructuralCapacity

CORROSION_CONTROL :=
  COATING
  + CATHODIC_PROTECTION
  + CORROSION_ALLOWANCE
  + MATERIAL_SELECTION
  + INSPECTION

MarineGrowth
  -> may_increase -> HYDRODYNAMIC_DIAMETER
  -> may_increase -> HydrodynamicLoad

# ---------- SCOUR ----------
Scour
  -> removes -> SEABED_MATERIAL
  -> around -> FOUNDATION

Scour
  -> may_reduce -> FoundationSupport

SCOUR_PROTECTION :=
  ROCK_DUMP
  | MATTRESS
  | ENGINEERED_PROTECTION

IF ScourDepth increases
THEN FoundationResponse -> REASSESS

# ---------- INSTALLATION ----------
Installation
  -> places -> OffshoreStructure
  + Foundation
  + MooringSystem
  + Riser
  + Pipeline

INSTALLATION_CONSTRAINT :=
  WEATHER_WINDOW
  | VESSEL_CAPABILITY
  | LIFT_CAPACITY
  | WATER_DEPTH
  | SEABED_CONDITION
  | TOLERANCE

Installation
  -> may_require -> HEAVY_LIFT
  | TOW_OUT
  | PILE_DRIVING
  | ANCHOR_INSTALLATION
  | PIPELAY
  | SUBSEA_CONNECTION

# ---------- INTEGRITY MANAGEMENT ----------
IntegrityManagement
  -> monitors -> STRUCTURAL_CONDITION
  + CORROSION
  + FATIGUE
  + MOORING
  + RISER
  + PIPELINE

INTEGRITY_PROCESS :=
  INSPECT
  -> ASSESS
  -> IDENTIFY_DEGRADATION
  -> EVALUATE_REMAINING_CAPACITY
  -> REPAIR_OR_MAINTAIN
  -> VERIFY

Inspection
  -> provides -> CONDITION_DATA

Maintenance
  -> restores_or_preserves -> FUNCTIONAL_CAPABILITY

# ---------- SAFETY ----------
OFFSHORE_SAFETY :=
  PROCESS_SAFETY
  + STRUCTURAL_SAFETY
  + FIRE_PROTECTION
  + EXPLOSION_PROTECTION
  + EVACUATION
  + EMERGENCY_SHUTDOWN
  + MARINE_SAFETY

SafetySystem
  -> detects -> HAZARDOUS_CONDITION
  -> initiates -> PROTECTIVE_ACTION

EmergencyShutdown
  -> isolates -> HAZARDOUS_PROCESS
  -> seeks_to_reduce -> ESCALATION

# ---------- PERFORMANCE ----------
OFFSHORE_PERFORMANCE :=
  STRUCTURAL_INTEGRITY
  + STATION_KEEPING
  + PRODUCTION_OR_ENERGY_AVAILABILITY
  + RELIABILITY
  + MAINTAINABILITY
  + SAFETY
  + ENVIRONMENTAL_RESILIENCE

OffshoreSystem
  -> evaluated_by -> OFFSHORE_PERFORMANCE

# ---------- REASONING ----------
OFFSHORE_ENGINEERING_REASONING :=
  DEFINE_OFFSHORE_FUNCTION
  -> CHARACTERISE_SITE
  -> DEFINE_ENVIRONMENTAL_LOADS
  -> SELECT_STRUCTURE_TYPE
  -> MODEL_HYDRODYNAMIC_RESPONSE
  -> DESIGN_FOUNDATION_OR_MOORING
  -> DESIGN_STRUCTURE
  -> DESIGN_RISERS
  -> DESIGN_PIPELINES
  -> INTEGRATE_SUBSEA_SYSTEMS
  -> INTEGRATE_TOPSIDES
  -> PLAN_INSTALLATION
  -> ASSESS_FATIGUE
  -> ASSESS_CORROSION_AND_SCOUR
  -> DEFINE_INTEGRITY_MANAGEMENT
  -> DEFINE_SAFETY
  -> VALIDATE_PERFORMANCE

# ---------- INFERENCE RULES ----------
IF WaterDepth increases
THEN StructureAndInstallationOptions -> REASSESS

IF WaveHeight increases
THEN WaveLoad -> GENERALLY_INCREASES

IF CurrentSpeed increases
THEN CurrentLoad -> GENERALLY_INCREASES

IF MarineGrowth increases
THEN HydrodynamicLoad -> MAY_INCREASE

IF CorrosionLoss increases
THEN StructuralCapacity -> DECREASES

IF ScourDepth increases
THEN FoundationStability -> MAY_DECREASE

IF MooringLineFailure occurs
THEN PlatformOffsetAndRemainingLineLoads -> REASSESS

IF FatigueDamage accumulates
THEN RemainingFatigueLife -> DECREASES

# ---------- SEMANTIC RELATIONSHIPS ----------
RELATION supports(Foundation, OffshoreStructure)
RELATION restrains(MooringSystem, FloatingPlatform)
RELATION connects(MooringLine, FloatingPlatform, Anchor)
RELATION transports(Riser, Fluid)
RELATION transports(Pipeline, FluidOrEnergy)
RELATION generates(Wave, WaveLoad)
RELATION generates(Current, CurrentLoad)
RELATION generates(Wind, WindLoad)
RELATION degrades(Corrosion, StructuralCapacity)
RELATION affects(Scour, FoundationSupport)
RELATION monitors(IntegrityManagement, OffshoreSystem)
RELATION installs(Installation, OffshoreStructure)
RELATION protects(SafetySystem, OffshoreSystem)

# ---------- SEMANTIC EQUIVALENCE ----------
SEMANTIC_EQUIVALENCE:
  "offshore engineering" ~= "offshore systems engineering"
  "offshore structure" ~= "marine offshore structure"
  "fixed platform" ~= "fixed offshore platform"
  "floating platform" ~= "floating offshore structure"
  "mooring system" ~= "station-keeping mooring system"
  "riser" ~= "offshore production riser"
  "subsea pipeline" ~= "offshore pipeline"
  "topside system" ~= "offshore topsides"
  "integrity management" ~= "asset integrity management"
  "offshore wind foundation" ~= "wind turbine support structure"

# ---------- CONFIDENCE ----------
CONFIDENCE:
  ontology_domain: 0.99
  structure_mapping: 0.99
  environmental_load_mapping: 0.99
  foundation_mapping: 0.99
  mooring_mapping: 0.99
  riser_pipeline_mapping: 0.99
  integrity_mapping: 0.99
  fatigue_corrosion_mapping: 0.99
  safety_mapping: 0.99
  semantic_relationships: 0.99

# ---------- UPDATE MODEL ----------
UPDATE_MODEL:
  ON new_offshore_system:
    CLASSIFY structure_type
    MAP site_conditions
    MAP foundation_or_mooring
    MAP risers
    MAP pipelines
    MAP topsides
    MAP safety_system
    UPDATE confidence
    RECOMPUTE FLOW_HASH

  ON environmental_change:
    UPDATE wave
    UPDATE current
    UPDATE wind
    RECOMPUTE environmental_loads
    REASSESS structural_response

  ON integrity_measurement:
    UPDATE corrosion_state
    UPDATE fatigue_state
    UPDATE scour_state
    UPDATE mooring_state
    UPDATE pipeline_riser_state
    PRESERVE provenance

  ON degradation_change:
    UPDATE remaining_capacity
    UPDATE remaining_life
    REASSESS maintenance_requirement
    REASSESS safety_state

  ON ontology_revision:
    PRESERVE entity_identity
    PRESERVE provenance
    UPDATE relationships
    UPDATE inference_rules
    UPDATE confidence
    RECOMPUTE FLOW_HASH

# ---------- AI CONSUMPTION ----------
AI_CONSUMPTION:
  parse_as: FORMAL_OFFSHORE_ENGINEERING_ONTOLOGY
  reasoning_mode: MARINE_STRUCTURAL_ENVIRONMENTAL_RELATIONAL

  preserve:
    - typed_entities
    - environmental_load_relations
    - structural_load_paths
    - foundation_and_mooring_relations
    - fluid_transport_relations
    - degradation_state
    - safety_constraints
    - confidence
    - provenance

  infer:
    - structure_selection_dependencies
    - load_response_dependencies
    - foundation_dependencies
    - mooring_dependencies
    - riser_pipeline_dependencies
    - integrity_requirements
    - safety_dependencies

  prohibit:
    - invented_site_measurements
    - assumed_structural_capacity
    - assumed_mooring_integrity
    - unsupported_fatigue_life
    - ignored_environmental_loads
    - ignored_safety_constraints

# ---------- FLOW HASH ----------
FLOW_HASH_INPUT :=
  DOMAIN + ONTOLOGY + CORE_ENTITIES + SYSTEM_STRUCTURE
  + STRUCTURE_CLASSIFICATION + SITE_CONDITIONS + ENVIRONMENTAL_LOADING
  + HYDRODYNAMICS + FIXED_STRUCTURES + GRAVITY_STRUCTURES
  + FLOATING_STRUCTURES + MOORING + ANCHORS + RISERS
  + PIPELINES + SUBSEA_SYSTEMS + TOPSIDES + OFFSHORE_WIND
  + FATIGUE + CORROSION + SCOUR + INSTALLATION
  + INTEGRITY_MANAGEMENT + SAFETY + PERFORMANCE + REASONING
  + INFERENCE_RULES + SEMANTIC_RELATIONSHIPS + SEMANTIC_EQUIVALENCE
  + CONFIDENCE + UPDATE_MODEL + AI_CONSUMPTION

FLOW_HASH := HASH(FLOW_HASH_INPUT)

END FLOW