FD-WaveLoad

FD-WaveLoad performs hydrodynamic analysis in the frequency domain to accurately predict motion, hull pressure distributions and sea loads for ships moving in waves.

FD-WaveLoad is a potential flow, three-dimensional panel-method code based on the zero-speed Green’s function with forward speed correction in the frequency domain.

Highly accurate and reliable, FD-WaveLoad has been validated through extensive numerical comparison with results from other software and experimental data. FD-WaveLoad is part of TRIDENT, Martec’s integrated software suite for 3D modeling, design and analysis of ship structures.

Key Features:

• Determine ship motion in all six degrees of freedom in regular and irregular waves
• Analyze hydrodynamic pressure distributions on ship hull
• Compute sea loads including shear forces, bending and torsion moments on any hull section
• Model ships with variable forward speed in waves
• Vary water depth and wave heading
• Perform multiple-ship hydrodynamic interaction analysis
• View animations of pressure distributions and actual ship motions
• Import results directly into Martec’s TRIDENT FEA software for FE-based structural analysis of ship

New in the 2004 release

• Updated graphical user interface improves ease-of-use
• Graphical display of result curves including motions and sea loads
• Enhanced panel generator for ships with bulbous bow and barges
• Multi-hull ship models, such as catamarans and trimarans
• Enhanced multiple-ship interaction analysis capability
• Improved link with TRIDENT FEA for detailed stress analysis of ship hull

Technical Specification:

• Frequency-domain analysis for prediction of motions, hydrodynamics, sea loads and pressures on floating bodies
    - Model mono or multi-hull ships of any type
    - Model fixed, moored or floating offshore platforms
    - Panel-method code based on the zero-speed Green function with forward
      speed correction
    - Model hydrodynamic interactions of multiple floating bodies in waves
• Accurately predict motions and hydrodynamics
    - Computation of motions in all six degrees of freedom: surge, sway,
      heave, roll, pitch and yaw
    - Estimation of added mass, damping coefficients and wave exciting forces
    - Model regular or irregular waves and any sea state
    - Model ships with forward speed in waves
    - Options are provided to consider the effect of uncoupled mooring lines
• Compute sea loads
    - Computation of sea loads including shear forces, bending and torsion     moments
    - Computation of irregular response analysis of motions and sea loads with
      different sea states by using Pierson-Moskowitz, ISSC, ITTC,
      JONSWAP, Bretschneider and Ochi-Hubble six parametric wave spectra
    - Computation of added resistance in waves
    - Computation of roll motion with the viscous damping effects due to bilge keel, eddy-making, frictional lifting and appendage
    - Select from Iterative, LU decomposition or Gaussian elimination solver
    - Options are provided to include the effects of m-terms
    - Option to compute sea loads on cross sections
• Analyze hydrodynamic pressure distributions
    - Hydrodynamic pressures include radiated, diffracted and incident wave components, and hydrostatic pressure fluctuation due to ship motions
    - View animations of hydrodynamic pressure distributions
• Perform multiple-body interaction analysis
    - Solve interaction problem of multiple bodies in waves
    - Determine interfering wave heights between the bodies
• Integrated finite element stress analysis
    - Import complete or component models from Martec’s TRIDENT FEA
      software
    - Computation of pressures on the finite-element nodes for structural
      analysis with up to 10,000 points
    - Computation of pressures and inertial force on the finite-element nodes
    - Transfer results directly into TRIDENT FEA and perform detailed stress
      analysis
• Panelization
    - Includes automatic panel generator for simplified input of hull geometry
    - Model various bow shapes including ships with a bulbous bow and barges
    - Optional manual input data file generation
• Post-processing
    - Ability to review results data, including RAO’s, added mass, damping
      coefficients and wave exciting forces
    - Display and print results as 2D or 3D contour plots, including wire frame,
      hidden line, and solid panel fill (with lighting and shading) options
    - View result curves for motions and sea loads
    - View animation of pressure distributions and ship motions

System Requirements:

• Intel® Pentium® processor
• Microsoft® Windows 2000, XP
• 512MB of RAM (recommended minimum)
• 30MB of available hard-disk space (recommended minimum)