Accession Number : AD0650635

Title :   TECHNIQUES FOR SIMULATING THE HYDRODYNAMIC FORCES ON SONAR DOMES BY STATIC LOADS.

Descriptive Note : Research and development rept.,

Corporate Author : DAVID TAYLOR MODEL BASIN WASHINGTON D C STRUCTURAL MECHANICS LAB

Personal Author(s) : Nott,James A.

Report Date : APR 1961

Pagination or Media Count : 28

Abstract : Techniques were developed by which the nonuniform hydrodynamic pressures on a sonar dome in a seaway can be simulated by multiple static loads. The surface of the dome is divided into separate loading areas, and the delineated areas are loaded with hydraulic rams to simulate both negative and positive hydrodynamic pressures. Stresses can be determined by the influence-coefficient method in which the blocks are loaded individually or by loading all the blocks simultaneously to simulate the hydrodynamic load distribution. Strain and deflection measurements made on a CW-351 sonar dome indicate the feasibility of static test techniques for curved structures. The results of the tests show that influence coefficients can be used to obtain stresses in the dome for nonuniform loading. In general, stresses equivalent to those resulting from steady-state hydrodynamic loads are obtained with good accuracy by the influence-coefficient method. (Author)

Descriptors :   (*SONAR DOMES, TEST METHODS), SIMULATION, FORCE(MECHANICS), LOADS(FORCES), STRESSES, FLUID DYNAMICS, HYDROSTATIC PRESSURE

Subject Categories : Test Facilities, Equipment and Methods
      Acoustic Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE