Accession Number : AD0766242

Title :   Passive Test Pad Models.

Descriptive Note : Environmental research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS HANSCOM AFB MA

Personal Author(s) : Thomson, Ker C. ; Kuenzler, Howard W.

Report Date : 16 FEB 1973

Pagination or Media Count : 83

Abstract : Seismic modeling techniques, appropriate to the study of models of test pads for motion sensitive instrumentation, were developed. A transient Rayleigh wave study of two model pads indicated that naively-developed isolation procedures may lead to enhancement of pad motion rather than to its suppression. As a step towards the development of more sophisticated design techniques, a two-dimensional mathematical model of pad motion was developed as a computer program. The test pad designer using this program provides input information consisting of a numerical description of the proposed pad, the substrate to which it is attached, and the nature of the seismic radiation arriving in the vicinity of the test pad. The program predicts the pad motion and, from a computer-controlled oscilloscope, can provide a 16-mm motion picture showing the magnified pad displacement as a function of time. (Modified author abstract)

Descriptors :   *INERTIAL GUIDANCE, *STABILIZED PLATFORMS, STABILIZED PLATFORMS, STABILITY, MATHEMATICAL MODELS, RAYLEIGH WAVES, MOTION, NOISE, EQUATIONS, NUMERICAL METHODS AND PROCEDURES, COMPUTER PROGRAMS, SUBROUTINES.

Subject Categories : Structural Engineering and Building Technology
      Seismology

Distribution Statement : APPROVED FOR PUBLIC RELEASE