Accession Number : AD0721391

Title :   Development and Application of Methods of Experimental Mechanics. Experimental Analysis of Stresses in a Buoy-Cable System Using a Birefringent Fluid,

Corporate Author : CATHOLIC UNIV OF AMERICA WASHINGTON D C SCHOOL OF ENGINEERING AND ARCHITECTURE

Personal Author(s) : Durelli,A. J. ; Clark,J. A.

Report Date : FEB 1971

Pagination or Media Count : 31

Abstract : An extension of the method of photoviscous analysis is presented which permits quantitative studies of strains associated with steady state vibrations of immersed structures. Strains can be determined both in the vibrating structure and in the surrouding fluid. The method is applied in an investigation of one form of behavior of buoy-cable systems loaded by the action of surface waves. Procedures are illustrated for evaluating directly from the strain data parameters useful to the buoy-cable system designer. The analysis performed is two-dimensional. The cable is modeled by a soft rubber strip, and the buoy by a round can floating on the surface of a birefringent fluid. A payload is simulated by a weight attached to the lower end of the strip. Waves of controllable frequency are produced by a device actuated by a shaker. Strains in the fluid and in the strip are determined from isochromatic and isoclinic data and the possible extension of the experimental results obtained to prototypes by means of scaling laws is suggested. (Author)

Descriptors :   (*MECHANICAL CABLES, STRESSES), (*BUOYS, MECHANICAL CABLES), WATER WAVES, INTERACTIONS, TEST METHODS, BIREFRINGENCE, EXPERIMENTAL DATA

Subject Categories : Machinery and Tools
      Marine Engineering
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE