Seats in rail vehicles are generally the focus of weight optimization, as there are usually a large number of seats in a rail vehicle. A one-off mass optimization can be multiplied. The seat structure is optimized through an extended topology optimization and a fatigue and vibration analysis, taking into account all technical regulations, in particular fire protection, structural load cases, fatigue and vibrations. Load levels have been implemented and functional integration has been realized. The structural weight has been reduced by approx. 25%.
Solution approaches
- Analysis and optimization of stiffness, structural load paths and stress distribution with regard to the use of materials
- Structural optimization of the seat structure with regard to implemented load levels combined with local reinforcement and global wall thickness reduction, balanced stiffness distribution and reduction of global wall thickness
- Optimization of the structural behavior with regard to fatigue and vibrations using FE simulation/optimization methods to ensure the operational stability of the weight-optimized seat structure with optimized use of materials
- Optimization of the acoustic frequencies on a lightweight seat structure, taking into account all given technical boundary conditions
- Simplification of the seat structure through functional integration and reduction of parts
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