Accession Number : AD0626412

Title :   DASHER I: A PROGRAM FOR THE DYNAMIC ANALYSIS OF SHELLS OF REVOLUTION,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE AEROELASTIC AND STRUCTURES RESEARCH LAB

Personal Author(s) : Wolf,Joseph A. ,Jr. ; Mack,Evelyn

Report Date : OCT 1965

Pagination or Media Count : 88

Abstract : This report presents an analysis and a computer program which permits determining the transient deformation of an undamped system which contains both inertial and elastic coupling by a timewise step-by-step computational process. The program is developed for the purpose of Dynamic Analysis of Shells of Revolution (DASHER). The input to the program consists of the stiffness and consistent-mass matrices which are derived from a finite-element representation of the structure. Three examples are presented to illustrate the application of this program. One of these concerns the dynamic deformations of a simply-supported beam subjected to a uniform step-function loading; the second concerns the dynamic deformations of a circular cylindrical shell under a uniformly distributed external pressure having a half-sine shape time history; and the third is similar to the second except that the axisymmetric pressure loading on the cylinder has a sin (Pi z)/L longitudinal distribution. Guidance for the selection of an appropriate time interval for this type of step-by-step calculation is provided. (Author)

Descriptors :   (*COMPUTER PROGRAMMING, DYNAMICS), (*DYNAMICS, BODIES OF REVOLUTION), (*REENTRY VEHICLES, AERODYNAMIC LOADING), DEFORMATION, SHELLS(STRUCTURAL FORMS), CYLINDRICAL BODIES

Subject Categories : Computer Programming and Software
      Mechanics
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE