Dynamic Analysis of the P and H 6250 Truck Crane Employing the 150 Foot Boom Stick Model

Abstract

The Civil Engineering Laboratory was requested by the Naval Facilities Engineering Command to develop an analytical procedure for determining performance limits for mobile cranes operating from floating platforms moored in the open sea. The mobile lift cranes commonly used in the construction industry being considered range from 300 to 600 ton rated capacity. The floating platform supporting the lift crane can be a sea going barge or a ship that has been modified to support the crane on its deck. There are four basic components that make up the lift crane according to the Power Crane and Shovel Association [1]. These components are: the mobile mounting, the revolving superstructure, the power plant, and the front end operating equipment. These components will be explained in further detail in ensuing paragraphs. The mobile mounting provides a fixed foundation from which the crane can operate and it also provides a means to transport the machine. One of the two types of mobile mountings is the crawler mounting. This mounting has two continuous, parallel crawler belts that provide the forward and reverse mobility In much the same way as a common bulldozer. The second type of mobile mounting is rubber tire carrier mounting. The truck type of mounting usually has separate engines for the carrier and the superstructure, whereas the self-propelled mounting generally has a common engine for the carrier and superstructure. In addition to transportability the mobile mounting provides the basic operating foundation for the machine. This foundation is enhanced to withstand overturning by using outriggers extending from both sides of the carrier. Another type enhancement employs the use of a circular ring, or ringer, that encircles the carrier to increase the machines stability.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1976
Accession Number
AD1074679

Entities

People

  • Frank Jr R. Johnson

Organizations

  • Naval Facilities Engineering Service Center

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Cargo Handling
  • Center Of Gravity
  • Civil Engineering
  • Coordinate Systems
  • Dynamic Loads
  • Dynamic Response
  • Engineering
  • Floating Platforms
  • Frequency
  • Heavy Duty
  • Machines
  • Nonlinear Analysis
  • Platforms
  • Structural Analysis
  • Structural Loads
  • Transient Response Analysis
  • Waves

Readers

  • Electrical Engineering
  • Facility/Structural Engineering.
  • Robotics and Automation.