Analysis of Shocks by Numerical Solution of Duhamel's Integral

摘要

The Duhamel's integral computer code was developed to analyze the transient response of test instrumentation and structures for survivability and reliability and to assess damage to human ear caused by nonclassical pressure pulses. The code has been used to assess the relative severity of laboratory test environment with respect to gun environments. The program has been installed on a mainframe, a front-end machine and several microcomputers in BASIC and FORTRAN programming languages so as to make it more accessible to the user. The Duhamel's integral package is now being run on the CRAY 2 supercomputer which, along with the CRAY XMP/48, has replaced the CYBER 7600 at the BRL. This code will be incorporated into the general structural and analysis scheme of the IBD. In addition, the program will be extended to compound response description which include more than one frequency and other nonlinear forms such as hardening and softening stiffness systems. Keywords: Shock survivability; Structural design; Shock pulse spectra; Shock testing; Hearing damage; Structural damage computer program; Duhamels integral. (edc)