Structural strength analysis of removable freight car body using finite element modeling

The paper analyses foreign removable body designs whose technical solutions were adopted in the modelling of the load-bearing elements of a freight car removable body. Virtual models were developed and analysed in SolidWorks Simulation using the finite element method. The simulations enabled identification of stress concentration zones, safety factors, and fatigue resistance indicators under operational loads while considering detailed kinematic boundary conditions and realistic fastening parameters (hinged or rigid). Particular attention was given to the frame as the primary load-bearing element; static analysis showed a maximum von Mises stress of 471 MPa at a permissible value of 473.3 MPa, corresponding to a safety factor of 1.5, while the end walls, crossbeam and sliding doors met applicable technical and regulatory requirements. The results confirm the reliability of the proposed design and provide a basis for further optimisation of metal consumption without compromising strength compliance.