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Berthing Energy Calc

Calculates characteristic and design berthing energy for a vessel from displacement, approach velocity, hydrodynamic and berth coefficients, and an explicit safety factor. The template applies the kinetic energy relationship E = 0.5 M V^2 and multiplies by the provided marine design coefficients.

inputs

7 fields

context

2 archetypes

engine

with-tool

outputs

4 scored fields

contract fields

Parameter Map

7 inputs to 4 scored outputs

  • vessel_displacement_t

    float

    Vessel displacement mass

    100 to 250000t

  • approach_velocity_m_s

    float

    Vessel approach velocity normal to berth

    0.02 to 0.5m/s

  • added_mass_coefficient

    float

    Added mass coefficient CM

    1 to 2.2

  • eccentricity_coefficient

    float

    Eccentricity coefficient CE

    0.3 to 1

  • berth_configuration_coefficient

    float

    Berth configuration coefficient CC

    0.8 to 1.2

  • softness_coefficient

    float

    Berth and fender softness coefficient CS

    0.8 to 1.1

  • safety_factor

    float

    Design safety factor applied to characteristic energy

    1 to 2
kinetic_energy_knmtol 0.03

Unmodified vessel kinetic energy

characteristic_energy_knmtol 0.03

Characteristic berthing energy after coefficient product

design_energy_knmtol 0.03

Design berthing energy

coefficient_producttol 0.03

Product of berthing energy coefficients

visibility contract

Difficulty Ladder

all_giveneasy

All parameters given for a small sheltered vessel

all fields visible
all_givenmedium

All parameters given across small and bulk vessels

all fields visible
all_givenhard

All parameters given for larger industrial berth cases

all fields visible

scenario bands

Archetype Atlas

small_service_vessel

2 contexts

Small service vessel berthing at a sheltered wharf

vessel_displacement_t200 to 3000
approach_velocity_m_s0.08 to 0.25
added_mass_coefficient1.2 to 1.8
eccentricity_coefficient0.6 to 1

service-wharf / ferry-terminal

bulk_carrier_berth

2 contexts

Bulk carrier berthing at an open industrial wharf

vessel_displacement_t30000 to 180000
approach_velocity_m_s0.06 to 0.2
added_mass_coefficient1.4 to 2
eccentricity_coefficient0.4 to 0.8

bulk-export-berth / industrial-port-wharf

rendered task

Generation Preview

bulk-export-berth-bulk-carrier-berth-preview

difficulty
hard
visibility
all_given
archetype
bulk_carrier_berth
site context
bulk-export-berth
instruction excerptberthing-energy-calc_calc.py

visible fields

  • vessel_displacement_t30000 to 180000 t
  • approach_velocity_m_s0.06 to 0.2 m/s
  • added_mass_coefficient1.4 to 2
  • eccentricity_coefficient0.4 to 0.8
  • berth_configuration_coefficient0.9 to 1.2
  • softness_coefficient0.85 to 1
  • safety_factor1.2 to 1.8

withheld schema

kinetic_energy_knmcharacteristic_energy_knmdesign_energy_knmcoefficient_product
Bulk carrier berthing at an open industrial wharf. bulk-export-berth. Required outputs: kinetic_energy_knm, characteristic_energy_knm, design_energy_knm, coefficient_product