Dynamic Vertical Forces on a Crane Loading (Unloading) a Floating Platform

Abstract

Marine cranes operate in the demanding and ever changing dynamic environment imposed by the sea. Some of the most severe loads occur when the crane is ship mounted and is on/off loading an adjacent barge or ship. The wave induced relative motion between the crane and the load, as the load leaves the barge platform, can produce severe dynamic stresses in the crane boom. The lifting line can become slack and then suddenly taut. But even with a continuous load in the hoist line, just the transfer of load from the moving platform to the crane will produce oscillations in the load. It is these oscillations which are treated in this paper.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1976
Accession Number
AD1073482

Entities

People

  • Carley C. Ward

Organizations

  • Naval Facilities Engineering Service Center

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Angular Acceleration
  • Cargo Handling
  • Containers
  • Coordinate Systems
  • Differential Equations
  • Displacement
  • Dynamic Loads
  • Engineering
  • Equations
  • Floating Platforms
  • Lepidoptera
  • Oscillation
  • Platforms
  • Relative Motion
  • Ship Decks
  • Square Roots
  • Stiffness

Fields of Study

  • Engineering

Readers

  • Logistics and Supply Chain Management.
  • Structural Dynamics.