In the development of new vehicles, the PSA Group aimed to detect Squeak and Rattle (S&R) problems before availability of physical testing. This led to a collaboration between PSA’s method development engineering team and Altair’s domain experts.
NUMERICAL OPTIMISATION METHODS
Squeak and Rattle (S&R) prediction using simulation is highly demanding. Numerical optimisation methods did pave the way for technical solutions.
The so called E-Line Method ,  consists of calculating the relative displacement, in time domain, between components and assessing S&R occurrence. Geometrical data like gap and tolerance variations are used for rattle detection, while stick-slip physical testing data is used for squeak detection. In addition to how the E-Line method was applied to real-life projects at PSA, this article will highlight how this simulation process has been integrated into the existing Virtual Development Process (VDP) .