Soeding Marine Computations

The one-persion enterprise was established in 2003 as `Ingenieurbuero Heinrich Soeding' in Hamburg (Germany). It is active primarily in predicting motions and loads of ships in a seaway. Currently, its main activity is distributing computer programs.

The methods applied in the following programs are described in the book by B.O. el Moctar, T.E. Schellin and H. Soeding: 

Numerical methods for seakeeping problems. Springer 2021

 

PDSTRIP: PDSTRIP: Computes motions, loads, drift forces and other responses of single-hull ships and boats
both in regular waves and in a stationary natural seaway. For details see: V. Bertram, H. Soeding,
K.\ Graf, PDSTRIP - A strip method for ship and yacht seakeeping.

 

PANSTEADY: Computes the flow around a symmetrical ship advancing steadily in still water.
The water may be deep or shallow. The program can be used to compute the wave resistance, an
approximation of the viscous resistance, the squat, and the wave field around the ship; however,
primarily it is intended to generate data required by the program PANFDS.

 

PANFDS: Computes motions of and loads on rigid ships in regular waves of arbitrary direction and
frequency. Both deep and shallow water can be dealt with. The program uses a Rankine panel method
to compute the potential flow of the water around the ship. Of viscous effects, only the foil effect
of the hull in oblique flow is taken into account Only linear responses and quadratical drift forces
are determined.

 

ROLLS: Simulates non-linear surge and roll motions coupled with linear sway, heave, pitch and yaw
motions in a stationary seaway. It is extremely fast by using the 'Grim's wave' concept in
combination with pre-computed righting levers depending on draft, trim and heel. One program
version is confined to intact ships, another one to ships containing openings and flooded
compartments. For details see also: H. S"oding, V. Shigunov, T. Zorn, P. Soukup, Method ROLLS for
simulating roll motions of ships, Ship Technology Research 60/2 (2013), and Bor-Chau Chang, On
the survivability of damaged ro-ro ships.

 

SIS: Simulates motions and loads of ships in a stationary seaway. It uses a Rankine source method,
satisfying the fully nonlinear boundary conditions on hull and water surface. Wave-induced vibrations
can be taken into account, modeling the hull as a Timoshenko beam. For details see: H. S"oding,
Nonlinear seakeeping and hydroelasticity of ships using potential flow simulations, Ship Technology
Research 70/3 (2023).

 

RUDDER: Computes lift, drag and shaft moment of spade and horn rudders in a given inhomogeneous
inflow using a panel method.

 

TANK: Computes sloshing in partly filled tanks and swimming pools produced by tank motions and/or
wave flaps. For arbitrarily shaped water surface and bottom topography, but restricted to linear
waves.

 

PLANING: Simulates Motions of a planing boat in head or following regular waves and in a long-crested
natural seaway. For details see: H. Soeding, M. Caponetto, R. Azcueta, Ship Technology Research
50/4, 2003.

 

Publications: See Heinrich Soeding in ResearchGate

Contact: Email h.soeding@gmx.de or Phone +494131 7899 993