FAMSNUB, A COMPUTER PROGRAM FOR DETERMINING THE FREQUENCIES AND MODE SHAPES OF NONUNIFORM BEAMS

Abstract

FAMSNUB is a digital computer program, written in single precision FORTRAN IV for the Philco-Ford/GE 265 time-sharing system, to determine the eigenfrequencies and eigenmodes of vibration in pure bending of loaded, piece-wise continuous single-span beams supported in any one of the ten possible combinations of the following end conditions: free, guided, hinged and clamped. Continuously variable beam properties may be accommodated by appropriate subdivision of the span. The distributed mass of the beam itself is taken into account by means of field transfer matrices; this represents an advance over the usual lumped-parameter approach. To preserve numerical accuracy at the higher mode values, a modified transfer matrix method is employed. Verification solutions have been obtained on the IBM 360-50/65 using the double precision facility.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1969
Accession Number
AD0696472

Entities

People

  • John L. Mcfarland

Organizations

  • Tank-automotive and Armaments Command

Tags

Communities of Interest

  • C4I
  • Cyber

DTIC Thesaurus Topics

  • Abstracts
  • Automotive Components
  • Bending Moments
  • Bending Stress
  • Computer Programs
  • Computers
  • Elastic Properties
  • Employment
  • Frequency
  • Materials
  • Materials Laboratories
  • Modulus Of Elasticity
  • Plastic Explosives
  • Precision
  • Shape
  • Shear Stresses
  • Vibration

Fields of Study

  • Physics

Readers

  • Computer Science.
  • Structural Dynamics.