Multi Objective Optimization of a Car's Side View Mirror Design

Shape's predictive models and powerful multi-objective optimization features can be used to find highly innovative and performant designs. Our Korean partners and resellers from CAD-IT used NC Shape to run a multi-objective optimization of a car's side view mirror design, on behalf of an automotive customer. Shape minimized both lift and drag forces while ensuring that the mirror's surface stays unchanged.

At the beginning of the project we had at our disposal a pre-existing dataset of Star CCM + CFD simulations of different mirror designs, that we used to train a model to predict the surface pressure field at a given speed.

Difference between Fixed Volume and Optimized Volume

This dataset was created in a previous phase of the project, and it was made with an old parametrization that was inevitably changing the mirror's surface. However, thanks to the uniqueness of Shape's predictive models, the free morphing used by Shape's optimization algorithm can be totally unrelated to the parametrizations used to generate the training dataset of the predictive model. This made it possible for us to explore totally new, disruptive design spaces, in a matter of a few minutes, without the need of launching any extra simulation.

Once the predictive model was trained, it was used by a genetic algorithm for the design's optimization to obtain the pressure fields of each geometry, which was then integrated to obtain the final objectives: the drag and lift forces. The results are shown in the following figures:

Pareto Front
Difference between Base Geometry and Morphed Geometry

About the author
Thomas von Tschammer
As Neural Concept Director of Operation, he joined the team in 2018 aiming to empower engineers with next a next generation tool dedicated to CAD and CAE.