Accession Number:

ADA279689

Title:

Equipment Shock Tolerance

Descriptive Note:

Final rept. Feb-Nov 1992

Corporate Author:

APPLIED RESEARCH ASSOCIATES INC ALBUQUERQUE NM

Report Date:

1993-04-01

Pagination or Media Count:

74.0

Abstract:

The objective of this research effort was to assess the accuracy of using the shock response spectrum SRS for defining equipment shock tolerance. The focus of the research was on mission-critical equipment installed in airbase hardened structures, designed to survive the airblast and ground shock effects of a close-in detonation by a modem, nonnuclear weapon. The motivation was the prospect of improving the shock tolerance of such equipment, by first improving equipment shock tolerance characterization, thereby improving knowledge of the factors controlling equipment shock tolerance. Two simple mathematical equipment models were developed to quantify some of the errors introduced by assessing the shock tolerance of equipment via the classic, linear, SDoF shock response spectrum. The effects of waveform dependency of equipment shock response multi- degree-of-freedom MDoF vs. SDoF equipment response multidirectional loading on equipment response and geometric nonlinearity on equipment response were investigated. . This study has proven the inadequacy of the linear, SDoF shock response spectrum for characterizing the shock tolerance of equipment. Complex, nonlinear mechanical equipment subjected to multi-directional support motion cannot be adequately represented by an SDoF SRS. Equipment fragility, Ground shock, Mathematical models, Modal analysis, Shock response spectrum, Structural dynamics

Subject Categories:

  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE