Accession Number : ADA117034

Title :   Approximate Theory for the Transverse Motion of a Two-Layered Plate. A Theoretical Model Applicable to Acoustic Scattering from Submerged Structures with Coating Layer(s).

Descriptive Note : Technical rept. Dec 81-Mar 82,

Corporate Author : NAVAL OCEAN SYSTEMS CENTER SAN DIEGO CA

Personal Author(s) : Vu,B Q

PDF Url : ADA117034

Report Date : 03 Mar 1982

Pagination or Media Count : 37

Abstract : An approximate theory is developed for the transverse motion of a two-layered plate. The two layers are assumed to be elastic, isotropic, homogeneous, and welded to each other. The theory is similar to the Timoshenko-Mindlin model for a single-layered plate in which corrections are included for shear and rotary inerita. A single equation of transverse motion is derived that predicts the first four antisymmetric modes and is applicable to practical problems. Phase velocities of these modes are numerically analyzed for a plate consisting of a copper layer and a steel layer. (Author)

Descriptors :   *Metal plates, *Transverse, *Motion, *Mathematical models, *Acoustic scattering, *Underwater structures, Equations, Layers, Copper, Steel, Mechanical waves, Acoustic waves, Acoustic coatings, Target strength

Subject Categories : Numerical Mathematics
      Submarine Engineering
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE