Design of an innovative front hood through simplified FEA models for pedestrian protection

Giuseppe Miscia, Andrea Baldini

Università degli Studi di Modena e Reggio Emilia

Sauro Porcu



During the design of a front hood of a vehicle it is necessary to take into account different targets that usually are very hard to optimize as a whole. Generally the required hood performances is achieved through the analysis of structural stiffness, modal analysis, aerodynamic effects, aesthetic, safety and many other. In particular it is important to focus on impact of the pedestrian’s head against the hood. Leaving a suitable distance between hood and compartments hood components, it is possible to provide a good crash response avoiding secondary hits. Therefore designers are often forced to elevate the hood design space compromising other performance required, such as the aerodynamic influences of the vehicles frontal area. The FEA models that simulate the complete frontal part of cars are very expensive in terms of computational time. Starting from a traditional aluminum front hood, it is possible to improve both static and dynamic performances through the creation of streamlined FEA models and implementation of complete FEA analysis at the end of the design process.