Rail transport

Lightweight construction, comfort and safety requirements play an important role in the development of railway vehicles. Users of public transport expect trouble-free operation, air-conditioned carriages and comfortable interiors. We draw on our many years of experience in the transport sector to develop innovative solutions for railway transportation. Another benefit for customers is the shorter development periods and the reduction in costs thanks to virtual product development. Our range of services focuses on the needs of our customers and includes simulations and calculations in the fields of acoustics, aero- and thermo-dynamics and minimisation of material use.

Our core expertise for the rail transport

Crash Simulation

TECOSIM simulates crash scenarios involving railway vehicles and components. In doing so, it calculates, analyses and simulates the energies and deformations produced by a crash and their effects on the structure. This delivers invaluable knowledge for the development of new trains, saves on costs and the number of prototypes for real crash tests and reduces impact on the environment.


Numerical computational fluid dynamics (CFD)

Numerical computational fluid dynamics (CFD) calculates phenomena which occur as gases and fluids flow over surfaces. Typical fields of application in rail transportation include air conditioning, external aerodynamics, cross-wind analysis and air pressure phenomena when travelling through tunnels. 



During the early stages of structural component development, long before elaborate, expensive testing is possible, durability analyses are used to evaluate and enhance designs with regard to structural strength and, above all, cyclic resistance. This allows weak points to be identified and eliminated from a design at an early stage. This process often also reveals weight potential and minimises the number of necessary laboratory tests. Typical fields of application include parts of the sub-frame, doors, fasteners, couplers and ancillary units.

NVH (Noise, Vibration, Harshness)

NVH calculations allow conclusions to be drawn on how to implement improvements regarding acoustics, vibrations and comfort. Typical fields of application include reduction of carriage noise for greater travelling comfort, optimisation of vibration states for all attachment parts, displacement of vibration amplitudes and optimisation of damping measures
(reduction in weight).



Different mathematical calculation methods enable our engineers to identify optimisation potential for individual components or component groups with regard to weight or mechanical properties. Analysis results are incorporated into the development process just the once or as part of a continuous improvement process. Typical fields of application in rail transportation include component optimisation, multi-physics problems and stability studies.

Multi-body system simulation

Multi-body system simulation is primarily used for rigid body calculation for powertrains and running gear components as well as kinematic simulation of articulated joints and drives. The speed of multi-body system simulation enables complex modules such as entire chassis to be easily mapped and integrated into control circuits.


System simulation

System simulation is used to examine highly complex overall systems in which many sub-systems interact. Mapping and simulating such a system is a supreme discipline: the physical properties of all components and sub-systems which are interconnected with each other and exert influence on one another must be described in a mathematically correct way and their behaviour evaluated. It is essential not to lose sight of the overall system as a sum of all parts for all details. TECOSIM has specialised in 1D simulation.

Coupled or multi-physics simulation

Sometimes it is simply not sufficient to examine the physical properties of components in isolation. Whenever several physical phenomena are to be examined regarding their interaction with one another, this is referred to as multi-physics simulation. Findings established in this way often present a truer picture than separate studies of individual phenomena. Multi-physics simulations play an increasingly important role in all stages of a product’s life cycle, from the analysis of new material properties, their mapping in virtual material models and parameters, through to production process simulation and calculation of product resistance under the effect of flow.