Dynamic Structural Flexible-Beam Response to a Moving Barge Train Impact Force Time-History Using Impact_Beam

Abstract

To design simply-supported, flexible impact beams spanning between cells or bents for lock approach walls, a dynamic structural analysis of the beam under impact time-history loads for design- specific barge trains is required. At several locks, this flexible structural feature is the primary structural member resisting the glancing-blow impact event of a barge train as it aligns itself with a lock. This technical report describes an engineering methodology used to conduct this dynamic structural analysis and visualize the resulting deflections, moments, and shears. This engineering methodology is implemented with a PC-based FORTRAN program and visual modeler named Impact_Beam. The engineering formulation for Impact_Beam uses time-history force data that are scaled for design specific barge trains to perform a dynamic structural response analysis for either a single degree of freedom system or a modal timehistory analysis for the simply supported beam subjected to a impact load that is travelling along the beam. Time-history force data has been collected from the interpretation of the results from the 1997 full-scale barge train impact prototype experiments conducted at Old Lock and Dam 2 just north of Pittsburgh, PA, and of the 2008 full-scale barge train impact experiments conducted at Winfield Lock and Dam, Winfield, WV. This database of pulse time-history can be scaled for site specific design barge trains with approach angle and velocity using the companion software Impact_Force. It is also possible to use force time-histories from other impact simulation software (e.g., dBEAS). The engineering formulation for Impact_Beam is verified against the original Winfield experiments using modal time-history analysis and dBEAS simulations using single degree of freedom analysis.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2011
Accession Number
ADA548303

Entities

People

  • Abdul N. Mohamed
  • Barry C. White
  • Bruce C. Barker
  • Jose R. Arroyo
  • Ralph W. Strom
  • Robert M. Ebeling

Organizations

  • Engineer Research and Development Center

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Compressive Strength
  • Computational Science
  • Computer Programs
  • Construction
  • Differential Equations
  • Dynamic Loads
  • Dynamic Response
  • Elastomers
  • Graphical User Interface
  • Impact Loads
  • Load Cells
  • Measurement
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Momentum
  • Static Loads

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Materials Science.
  • Structural Dynamics.