With the combination of many years of experience and state-of-the-art software tools, PJM achieves extreme lightweight construction with maximum operational reliability.

Structural analysis using FEA leads to a better understanding of the mechanical relationships in particularly complex geometries. With our extensive know-how in the evaluation of calculation results and in-depth understanding of the relevant standards, we create the highest level of innovative strength.

Our highlights:

Classic strength verification (for approvals in accordance with TSI)
We carry out arithmetical strength verifications for a wide range of components, including passenger and freight wagon bodies (EN12663-1/-2, VDV152), bogie frames and bearing housings (EN13749), wheelset shafts (EN13103-1) and wheels (EN13979-1). The strength calculations are carried out as accredited testing laboratory.

Weld seam assessments according to all common methods and regulations

• Nominal stress, structural stress and notch stress concept
• IIW, Eurocode, FKM guideline, DVS1608 and DVS1612, EN17149, EN15085, BS7608, etc.

Topology optimization
PJM pioneered the use of innovative approaches to topology optimization in lightweight freight wagon construction. Following a comprehensive design space study, a bionic structure was developed which served as the basis for the construction design. Finally, this was implemented in the series design.

Creation of DMS plan and comparison with test results

Fatigue strength verification of structural parts of electrical components
Computational validation of the vibration test according to EN61373 in product development

Bolt calculation in accordance with VDI2230 and EN17976
PJM takes cutting loads or bolt stresses from the FEA into account in the analytical assessment of bolted joints.

Highly complex static calculations
Consideration of non-linear material behavior (elastic-plastic), contact non-linearities and geometric non-linearities (large deformations).

• Thermo-mechanical calculation of block-braked wheels and brake discs
• Strength verification of wheels according to AAR S-660 and S-669 with consideration of the quenching process

Highly complex dynamic calculations

• Explicit crash calculation in accordance with EN15227 as part of the accredited testing body
• Implicit calculation of natural frequencies and forced vibration
• Sound radiation of wheels using Vibratec-Stardamp