Accession Number : ADA183084

Title :   Computational Methods in Ocean Structural Engineering - A Review.

Descriptive Note : Final rept. Oct 82-Sep 84,

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s) : Shugar,Theodore A. ; Armand,Jean-Louis

Report Date : MAY 1987

Pagination or Media Count : 255

Abstract : This report describes the state-of-the-art in computational methods for ocean structural engineering related to Navy shore and off-shore facilities. It is divided into three main parts: wave loads, structural response, and reliability methods. The basics of fluid mechanics that relate to wave load hydrodynamics are presented so that the technical problems faced by engineers as they seek tractability in the solution of problems governed by the highly nonlinear Navier-Stokes equation are appreciated. The concept of added mass is shown to be a mathematical artifice, but nonetheless remains indispensible to tractability in computing wave loads. Emphasis is given to the derivation and numerical solution of the diffraction boundary value problem for hydrodynamic wave loads on partially or fully submerged, large structures. The Morison equation approach for determining wave loads on small, cylindrically shaped structural members is discussed. Boundary element methods play a large role in numerical situations for ocean wave forces. The structural mechanics of ocean cable systems in the context of finite element technology is discussed. The emphasis is on solution methods for the discrete nonlinear finite element equations. Keywords: Potential flow; Diffraction theory; Towing; Stability; Parametric resonance; Structural reliability.

Descriptors :   *NUMERICAL METHODS AND PROCEDURES, *OCEAN WAVES, *MECHANICAL CABLES, *MARINE ENGINEERING, *STRUCTURAL ENGINEERING, BOUNDARIES, CYLINDRICAL BODIES, SHAPE, STRUCTURAL MEMBERS, EQUATIONS, FLUID MECHANICS, NAVY, SHORES, NUMERICAL ANALYSIS, BOUNDARY VALUE PROBLEMS, DIFFRACTION, FINITE ELEMENT ANALYSIS, HYDRODYNAMICS, LOADS(FORCES), WATER WAVES, NAVIER STOKES EQUATIONS, NONLINEAR DIFFERENTIAL EQUATIONS, SOLUTIONS(GENERAL), NAVAL SHORE FACILITIES, TOWING, RESONANCE, TOWING CABLES, MOORED BODIES, CABLES, OCEANS, OFFSHORE STRUCTURES, STRUCTURAL MECHANICS, UNDERWATER STRUCTURES, POTENTIAL FLOW, PROBLEM SOLVING, STRUCTURAL RESPONSE, TRACTABLE

Subject Categories : Structural Engineering and Building Technology
      Marine Engineering
      Physical and Dynamic Oceanography
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE