VMA - CFD / Hydrodynamic Response Analysis Codes


listed in alphabetical order!

Boat3D	Boat3D is a software which does 3-degree-of-freedom simulation of planing boat motion, predicting (at planing speeds) boat performance in calm water and waves from hydrodynamic theory. For a given boat design, Boat3D estimates the forces on a hard-chine planing boat using an added-mass analytical approach and solves for the predicted trajectory of motion of the boat. Boat3D lets you estimate the speed you will obtain from a particular design for a given engine/propeller thrust. It also lets you estimate the accelerations imposed on the boat occupants at a particular speed in a particular sea condition, and the amplitude of the pitching response to the sea.

Lamp	LAMP is the SAIC three-dimensional time-domain Large Amplitude Motions Program. It calculates time-domain motions and loads of floating bodies with or without forward speed, and it can be used for the numerical solution of many seakeeping-related problems. Its prediction capabilities include the following: impulse response functions wave resistance of ships in calm water or in waves linear and nonlinear motions of vessels in waves linear and nonlinear hydrodynamic forces linear and nonlinear wave excitation forces pressure distribution over the hull surface linear and nonlinear wave loads impact and whipping loads nonlinear simulation of time-domain ship motions in large-amplitude waves.

PowerSea	Predicts the heave, pitch and surge response of a planing hull as it encounters regular or irregular seas. When the forward velocity or thrust and the shape of the waves or wave spectrum was specified, the hull’s motion including surge, heave and pitch displacements, velocities and accelerations will be calculated. It will help you to predict time dependent effects such as porpoising, deck wetting and boat accelerations.

Seakeeper	A hydrodynamic and seakeeping analysis program that provides fast, reliable calculation for many types of designs in a variety of sea states. Can directly works with maxsurf surface models.

SeaShip	SeaShip simulates motion of a numerical hull model in wind-sea and swell. It animates three-dimensional interactions between the ship and the waves with the graphics card in your personal computer. It shows changes in trim and motion that result from changing load or hull shape. SeaShip needs two inputs, a numerical model of the hull, and a sea and swell spectrum.

Seaway	Seaway is a frequency-domain ship motions program, based on the linear strip theory to calculate the wave- induced loads, motions, added resistance and internal loads for six degrees of freedom of displacement ships and yachts, barges, semi-submersibles or catamarans, sailing in regular and irregular waves. This 2-D potential theory program is suitable for deep water as well as for shallow water. Viscous roll damping, bilge keels, anti-roll tanks, free surface effects and linear springs can be added.

ShipMo	ShipmoPC is a strip theory-based, frequency domain seakeeping code capable of computing the six degree-of-freedom motions of a monohull with forward speeds in regular as well as irregular seas of arbitrary headings.

Shipmo-Marin	Shipmo-Marin is based on the well-known 'strip-theory'. The potential theory underlying Shipmo hinges on the slenderness of the ship's hull and on linearity of the hydrodynamic forces. The program is actually split up into two parts. In the first part the hydrodynamic reaction forces, expressed in added mass, damping and wave forces, are calculated. In the second part of the program the sectional coefficients are integrated over the ship length and the equations of motion are solved. The integration can also be carried out for a segment of the ship, which gives the possibility to calculate the internal loads in the hull, like bending moments, shear forces and torsional moment.

Shipmotions	The Ship Motions Program is a program for predicting regular wave responses and statistical information from an initial hull geometry. The motion can be calculated with five degrees of freedom; heave, sway, roll, yaw and pitch. Different types of spectra may be used to generate the statistics, and wave spreading may be invoked. The wave angles may be from any direction between ahead and astern.

Skip	Skip is a code for the prediction of the seakeeping behaviour for the monohull configuration. The code is based on strip theory assumption and is able to calculate the linear transfer functions of the rigid-body motions in 6 DOF in waves. The hull geometry described by Lewis forms and the vertical motions are evaluated in terms of vertical and lateral shear force, vertical and lateral bending moment and torsional moment. There is also a twin hull configuration version; Twinmot.

Soap	Soap is a code to perform seakeeping operability analysis in the short- and long-term according to the newest criteria related to human factors. The code has an interfacing facility with a generic linear seakeeping code in the frequency domain via a standard format file.

Splash	SPLASH is a fully 3-D nonlinear free-surface potential flow panel code for aero/hydrodynamic design and anlysis of marine vehicles. Applications range from steady and unsteady (seakeeping) performance predictions for America's Cup and other grand prix race sailing yachts, to prediction of unsteady hydrodynamic loadings for structural analysis of oil tankers.

UsAero	USAERO uses potential flow and boundary layer methods with a time-stepping procedure for arbitrary motions assures timely and cost effective assessments of unsteady surface pressures and loads. USAERO calculates the transient aerodynamic characteristics of complex configurations in arbitrary motion. It is based on a time-stepping procedure, which allows relative motions of configuration components. As integral potential flow and boundary layer methods are the basis of this CFD software, the aerodynamics solution is only required on the boundary surfaces for each time step and requires only surface meshing.

VisualSMP	VisualSMP is a suite of tools used in the prediction and analysis of a ship’s seakeeping characteristics. Included in VisualSMP is the SMP95 strip theory based frequency domain seakeeping program, the SEP96 seakeeping analysis program, the STH97 time history program, and the SWMP96 SWATH seakeeping program, all developed by the US Navy. VisualSMP adds a graphical pre- and post-processor, together with tools to simulate and visualize the motion of the ship in a seaway.

Wamit-Hipan	Two hydrodynamics codes developed by M.I.T. that can work with MultiSurf models. AeroHydro has provided geometry support for the WAMIT Joint Industry Project at M.I.T.'s computational Hydrodynamics Facility, and has supplied advanced modeling and panelization capabilities to WAMIT. HIPAN uses B-spline geometry and singularity distributions, and require quite different geometric input from WAMIT.

WaveLoad	WaveLoad is a powerful hydrodynamic analysis tool for ships and offshore structures in the frequency and time domain. By accurately predicting wave loads and structural behavior in various sea states, WaveLoad increases the safety and performance of ships and offshore structures.