TD-WaveLoad

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

TD-WaveLoad is based on the three-dimensional panel method and the time-domain Green‘s function. The radiation and diffraction forces are computed on the mean wetted surface. The non-linear Froude-Krylov forces and restoring forces are computed on the instantaneous wetted surface under the incident wave profile. Also taken into account are other non-linear forces such as viscous damping forces and maneuvering forces.

Results from TD-WaveLoad have been validated by direct comparison with measured data for various hull shapes including frigates and container vessels.

Key Features:

• Perform non-linear hydrodynamic analysis in the time-domain
• Determine ship motions with time series of displacements, velocities and accelerations
• Analyze hydrodynamic pressure distributions over the wetted ship hull surface
• Compute sea loads including shear forces, bending and torsion moments on any section
• Incident waves can be regular or irregular
• Import complete or component models from TRIDENT FEA
• Transfer results directly into TRIDENT FEA for further structural analysis
• Display results as contour plots or animations of pressure distributions and ship motions

Technical Specification:

• Non-linear hydrodynamic analysis in the time-domain for prediction of motions, sea loads and pressures on floating bodies
    - Model mono or multi-hull ships of any type
    - Based on the three-dimensional panel method and the time-domain
      Green’s function
    - Radiation and diffraction forces are computed on the mean wetted surface
    - Non-linear Froude-Krylov forces and restoring forces are computed on
      the instantaneous wetted ship hull surface under the incident wave profile
    - Also taken into account are other non-linear forces such as viscous
      damping forces and maneuvering forces
  
• Accurately predict motions
    - Determine ship motions with time series of displacements, velocities
      and accelerations
    - Computation of motions in all six degrees of freedom: surge, sway,
      heave, roll, pitch and yaw
    - Model ship motions in regular or irregular waves
    - Model ships with forward speed
• 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 viscous roll damping coefficients due to bilge keel,
      eddy-making, frictional lifting and appendage
    - Options are provided to accurately compute m-terms
    - Option to compute sea loads on cross sections
• Analyze hydrodynamic pressure distributions
    - Analyze hydrodynamic pressure distributions over the wetted surface
    - Hydrodynamic pressures include radiated, diffracted and incident wave
      components, and hydrostatic pressure fluctuation due to ship motions
    - View animations of hydrodynamic pressure distributions
• Panelization
    - Includes automatic panel generator for simplified input of hull geometry
    - Model various bow shapes including bulbous bows and barge-type bows
    - Optional manual input data file generation
• Post-processing
    - Ability to review results data, including ship motions with time series
      of displacements, velocities and accelerations
    - Display results as 2D or 3D contour plots, including wire frame, hidden
      line, and solid panel fill (with lighting and shading) options
    - View time-history curves for motions and sea loads
    - View animation of pressure distributions and ship motions

System Requirements:

• Intel® Pentium® processor
• Microsoft® Windows 2000, XP
• 1GB of RAM (recommended minimum)
• 30MB of available hard-disk space (recommended minimum)