Accession Number : AD0664764

Title :   EFFECT OF ANTENNA OPERATION ON STRUCTURE AND FOUNDATION BEHAVIOR, AMRAD AND RAMPART RADAR TOWERS WHITE SANDS MISSILE RANGE, NEW MEXICO.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Ballard,Robert F. , Jr. ; Fowler,Jack

Report Date : DEC 1967

Pagination or Media Count : 56

Abstract : The effects of antenna operation on the structure and foundation behavior of AMRAD and RAMPART radar towers were studied. The towers were almost identical except for small differences in foundation diameter and structure height. Displacements, frequencies, phase of movement, and attenuation characteristics of the towers were determined. Transducers were positioned to measure movement in three planes: one vertical, and two horizontal (mutually perpendicular to each other and in the plane of rotation). The greatest displacements occurred near the tops of the structures during the azimuth (torsional) and elevating (rocking) modes of antenna operation, and decreased in magnitude toward the foundation. The average maximum displacements at each instrumented location were plotted from data collected for the azimuth and elevating modes of antenna operation. The AMRAD antenna was operated at twice the velocity of the RAMPART antenna, and AMRAD displacements recorded during the rocking mode were approximately twice those of RAMPART.

Descriptors :   (*GUIDED MISSILE TRACKING SYSTEMS, ANTENNA MASTS), (*ANTENNA MASTS, RADAR ANTENNAS), (*FOUNDATIONS(STRUCTURES), *RADAR STATIONS), SITE SELECTION, SOIL MECHANICS, PERFORMANCE(ENGINEERING), LOADS(FORCES), GUIDED MISSILE RANGES, NEW MEXICO, MOTION, DEFLECTION, DAMPING, RESONANT FREQUENCY, PHASE SHIFT CIRCUITS, PARABOLIC ANTENNAS

Subject Categories : Structural Engineering and Building Technology
      Active & Passive Radar Detection & Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE