Accession Number : AD0751332

Title :   Inertial Guide Test Pad Study.

Descriptive Note : Final rept. 1 Jun 71-31 May 72,

Corporate Author : NEW YORK UNIV N Y COURANT INST OF MATHEMATICAL SCIENCES

Personal Author(s) : Burridge,Robert

Report Date : JUN 1972

Pagination or Media Count : 60

Abstract : The report deals with the problem of finding the vibration of a foundation block (test pad) imbedded in, or resting on, an elastic substratum, when seismic waves traveling in the elastic substrate impinge upon the foundation block. Chapter 1 deals with the situation where a rigid block is welded to the surface of an elastic half-space. The problem is set up mathematically as a system of integro-differential equations in one space dimension and time. A numerical scheme is set up to solve the system step-by-step in time for arbitrary, time dependent, incident radiation. In particular the incident field may represent body waves or Rayleigh waves. Computer programs which execute the numerical scheme are listed and their function described in Appendices to Chapter 1. In Chapter 2 an analytical treatment is given for the problem where incident SH waves impinge upon a rigid strip. Asymptotic formulae valid when the width of the strip is small compared with a wavelength are given. (Author)

Descriptors :   (*VIBRATION, EQUATIONS OF MOTION), (*STABILIZED PLATFORMS, CAPTIVE TESTS), (*FOUNDATIONS(STRUCTURES), VIBRATION), SEISMIC WAVES, DIFFRACTION, COMPUTER PROGRAMS, INTEGRAL EQUATIONS, DIFFERENTIAL EQUATIONS, INERTIA, NUMERICAL INTEGRATION, RAYLEIGH WAVES

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE