Accession Number : ADA955083

Title :   Description and Usage of General Bending Response Code 2 (GBRC2).

Descriptive Note : Technical note,

Corporate Author : NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD APPLIED MATHEMATICS LAB

Personal Author(s) : Henderson,Francis M.

Report Date : AUG 1966

Pagination or Media Count : 148

Abstract : In the GBRC1 code the method of analysis is applied to the set of partial differential equations for torsion-horizontal bending motion of a ship hull as represented by a moderately nonuniform slender beam. The resulting set of time-independent finite-difference equations is formulated in terms of matrices and is generalized for application to systems of beams connected by springs. GBRC2 retains the following basic provisions of GBRC1: specification of various types of damping including Rayleigh (viscous) and hysteretic (structural) damping; automatic calculation of effective mass as a function of frequency; and frequency-proportional exciting forces and moments. The types of tabular output available with GRC2 are the same as for GBRC1. A summary table gives the absolute values of deflection, moment, and twist at five (or fewer) selected beam sections, for all freqeuncies computed. The graphic editing facilities of GBRC1 are extended in GBRC2 to allow the plotting of calculated results (deflection, moment, rotation) assocaited with particular components of the structural system such as the hull, propeller shaft, etc. on separate graph frames. The programming language for GBRC2 is a FORTRAN IV compatible version of FORTRAN II. Keywords: Ship vibration.

Descriptors :   AUTOMATIC, BEAMS(STRUCTURAL), BENDING, COMPUTATIONS, DAMPING, DEFLECTION, EDITING, FACILITIES, FORTRAN, FRAMES, FREQUENCY, FUNCTIONS, GRAPHICS, GRAPHS, MOMENTS, MOTION, NONUNIFORM, OUTPUT, PARTIAL DIFFERENTIAL EQUATIONS, PLOTTING, PROPELLER SHAFTS, SHIP HULLS, SHIPS, SLENDER BODIES, SPRINGS, STRUCTURES, TABLES(DATA), VALUE, VIBRATION, AUTOMATIC, BEAMS(STRUCTURAL), BENDING, COMPUTATIONS, DAMPING, DEFLECTION, EDITING, FACILITIES, FORTRAN, FRAMES, FREQUENCY, FUNCTIONS, GRAPHICS, GRAPHS, MOMENTS, MOTION, NONUNIFORM, OUTPUT, PARTIAL DIFFERENTIAL EQUATIONS, PLOTTING, PROPELLER SHAFTS, SHIP HULLS, SHIPS, SLENDER BODIES, SPRINGS, STRUCTURES, TABLES(DATA), VALUE, VIBRATION

Subject Categories : Marine Engineering
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE