A NASTRAN Model and Analysis of the Unattended Expendable Jammer (UEJ).

Abstract

The Harry Diamond Laboratories has developed a design and preliminary hardware for an unattended expendable jammer (UEJ) system. Each unit consists of a cylindrical steel sleeve with an integral steel base plate and an ejectable steel cover. Each package contains an electronic jamming network, an antenna, electronic printed circuit boards, and a battery pack. To analyze the stresses in a unit a NASTRAN finite element model was developed. The model consisted of 502 grid points located in a repetitive pattern at each of six levels. Static and dynamic analyses were performed with this model for both launch (setback) and landing conditions. In the static analyses stresses and displacements in the UEJ are presented. In the modal analysis, the ten lowest mode shapes for each load case were determined. Several design recommendations have been made based on this analysis. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
May 01, 1980
Accession Number
ADA085166

Entities

People

  • John T. Young

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Axial Loads
  • Circuit Boards
  • Engineering
  • Explosive Charges
  • Explosives
  • Frequency
  • Frequency Response
  • Materials
  • Mechanical Properties
  • Modal Analysis
  • Moment Of Inertia
  • Printed Circuit Boards
  • Printed Circuits
  • Resonant Frequency
  • Stress Concentration
  • Stresses
  • Walls

Fields of Study

  • Engineering

Readers

  • Aerospace Test and Evaluation
  • Structural Dynamics.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems