Projects

Dynamical caracterisation of brake

Accomplishments

Dynamical characterization of a brake pad is a highly complex process. During braking, vibrations are induced by friction. The contact interface is challenging to control as it constantly evolves. However, certain resonant frequencies that appear much louder are termed "squeal." Generally, squeal is characterized by the modal coupling of the disc and brake pad. In this experimental test, the objective was to characterize the modal shape during squeal using Frequency Domain Decomposition (FDD) and correlate it with a Finite Element Model. By doing this correlation, the goal is to avoid modal coupling during braking.

Metamodeling / Model reduction

Metamodeling of a train component using a neural network involved optimization to reduce the mass and cost of the structure. This optimization was performed using genetic algorithms. The optimization of components achieved a reduction of 30% in the mass and cost of the components studied.

Correlation test/calcul

Optimization of the mechanical properties of a Finite Element Model aimed to correlate the numerical model with experimental modal analysis, which was conducted using a hammer test.