Simulation and Computer Programs

For many decades, computer programs have been developed at FZG for many research topics. Computer programs allow a comfortable application of the developed methods and research results by the experts in practice.

Some exemplary programs are specified in the following passages.

The program GAP allows a first design of gears.

Individual gear geometry can be realised with the Flank Generator.

The gear geometry and the load-carrying capacity of cylindrical gears according to DIN/ISO 6336, AGMA and many other calculation methods, can be calculated in STplus.

The bevel gear standard program KNplus allows a calculation of bevel gear load-carrying capacity according to DIN 3991 and further methods.


The program LAGER2 calculates the rolling element bearing stiffness (internal load and stresses) as well as the fatigue life of bearings according to DIN ISO 281.

RIKOR allows the calculation of shaft deformation, bearing deflection, tooth flank modifications, load sharing in the tooth contact, damage-related stresses and contact pattern of spur, helical and double-helical gears.

WTplus is used to calculate the efficiency and the heat management of any manual, automatic and industrial gearboxes.

TriboMesh allows the numerical calculation of fluid-free and elastohydrodynamically (EHL) lubricated rolling-sliding contacts of spur and helical gears. Current projects deal with the extension of TriboMesh to bevel, hypoid and worm gears.

DZP calculates transmission errors, force excitation, Eigen frequencies and dynamic forces in spur and helical gears.

RIKOR2DYN allows a dynamic gear analysis.

With ANPLA dynamic force excitation of planetary gears can be identified.

SNESYS includes different programs for design and calculation of worm gears.

SYNTEM calculates the temperature development in gearbox synchronization during a shift. Internal, external, double or triple cone synchronization in a largely free choice of friction surface construction / geometry can be calculated.

KUPSIM calculates the temperature balance in multidisc clutches / brakes for individual friction and cooling phases with regard to heat dissipation through the oil.

In addition, computational studies are conducted by using finite element method (FEM) and computational fluid dynamics (CFD).

With funds of the Forschungsvereinigung Antriebstechnik e.V. (FVA) the FVA IT center was established at the FZG. This center serves the member companies as a partner and as a center of excellence in the field of computer application in drive technology. Many FVA computer programs for design and simulation of driveline elements are integrated into the FVAWorkbench and are checked and distributed by the FZG.