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RBSDYN is a tool for pre-design, design and expertise of rolling bearings (ball with 2 or 4 contact points, cylindrical and tapered rollers). The software calculates the load distribution between the bearing's rolling elements of whatever its origin such as mechanical, thermal and also the races' fittings inside the housing and onto the shaft. The load distribution is computed according to the mounting features (hard or compliant preload, outer forces, mounting conditions) and also from the rotor, housing and rolling bearings flexibilities. The software implements a 2-D axisymmetric finite element code combined with dedicated rolling bearing program. This association permits mainly to account for the rolling bearings non-linear stiffnesses. This makes it possible to integrate the dynamic behaviour of the bearing by a digital time step algorithm.

The origin of loads can be either mechanical (at nodes, gravity, static acceleration, harmonic vibration, random spectrum and shock) or from a user specified temperature map. The software can also assess the thermal resistance (in K/W) of each bearing balls' row.

RBSDYN also uses skill models issued from the expertise which allows representing the behaviour of some specific parts such as press-fit bushings and spacers. The software enables to import stiffness, mass and damping matrices which are defined over a given number of nodes and also export the matrices built from the model construction, notably the stiffness matrice specified at a given node. It can also model specific parts such as membranes or infinitely stiff bodies.

RBSDYN computes stiffnesses of the rolling bearings, the bearing and the entire model.

The software provides the modal analysis from the linearized model given by the preloaded equilibrium. This stage enables to optimise the whole bearing features with respect to the outer loads and the required rolling bearing life span.

RBSDYN calculates the displacement map either in a linear mode or in a digital time-step integration mode. The outputs are mainly the rolling bearing results such as the contacts' Hertzian pressure, the crushing or gapping of the rolling element and the contact ellipse truncation. It is also possible to specify a set of input parameters and run a series of parametric calculations. All the results can be exported in a spreadsheet file format.

Code language:

C++ and FORTRAN. RBSDYN is delivered through an installer file.


RBSDYN V4.5.1.4. of 18th of january 2022.

Content of downloading:


suivi des modifications


Changes tracking file 


Software installer program


Manuel de l'utilisateur français


User’s manuel in English

ESA Workshop-RBSDYN presentation.pdf


DSO-TB-MS – 2019.0021002-RBSDYN 4.4.3-software validation report.pdf


DSO-TB-MS 2019.0006755-RBSDYN validation.pdf


DSO-TB-MS-2018.0017243-RBSDYN 4.4.2-Latest improvements.pdf



Kee_code valid within the calendar year

Exemple V4.4.4.3.rbd

a model example

WS_03_RBSDYN presentation_CNES.pdf

RBSDYN presentation at CNES

WorkShop MS 13 Sept2012 Rbsdyn EN.pdf

RBSDYN presentation at ESA


Information about training

Operating system:

RBSDYN can be operated on PC fitted with an operating system from Windows XP and upper. (See the user's manual for more details about the required configurations).

Get in touch:

For any further information get in touch with us at: