Accession Number : AD0663266
Title : BOUNDS TO TORSIONAL FREQUENCIES OF NON-UNIFORM SHAFTS, AND APPLICATIONS TO MISSILES.
Descriptive Note : Technical memo.,
Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB
Personal Author(s) : Rubinstein,Nathan ; Sigillito,Vincent G. ; Stadter,James T.
Report Date : OCT 1967
Pagination or Media Count : 57
Abstract : Non-uniform shafts can be used as accurate models for the analysis of missile vibrations. Digital programs that can calculate the upper and lower bounds to the torsional vibrations of such free, non-uniform shafts and can accept input data in standard engineering units were developed. How the programs are used (i.e., input/output data packages), underlying theory and its application to the programs, a description of the programs themselves, and the subroutines of the programs are presented. FORTRAN listings for both upper and lower bounds, along with sample printouts of both, are included. Improvements over other existing programs, offered by these programs are that they: (1) give upper and lower bounds that bracket the true frequencies, (2) are computationally fast and accurate, (3) can handle a large number of non-uniformities, and (4) can be easily extended to handle shafts that have more complicated variations of stiffness and mass than those presented. (Author)
Descriptors : (*GUIDED MISSILES, VIBRATION), (*SHAFTS(MACHINE ELEMENTS), FREQUENCY), GUIDED MISSILE MODELS, TORSION, MATHEMATICAL ANALYSIS, COMPUTER PROGRAMS
Subject Categories : Guided Missiles
Distribution Statement : APPROVED FOR PUBLIC RELEASE