Abstract:

A design optimization method was established for engine hood with multidisciplinary automatic calculation process including structure rigidity, NVH (noise-vibration-harshness) performances and pedestrian protection performances. An engine hood parametric model was built to optimize globally the engine hood
by using a SFE Concept software with an implicit parametric method, with taking the position of the inner longitudinal beam of the engine hood and others as variables, using an iSight software platform, and with calling a simulation queue, based on the result of multidisciplinary Design Of Experiment (DOE) sample calculation. The results show that the improved engine hood improves pedestrian protection performance score from 7.42 to 7.72 according to the China New Car Assessment Program(C-NCAP) due to some small structural adjustments to obtain obvious optimization. Therefore, the design optimization method can be applied to due to the engine hood forward multidiscipline design optimization

Key words: engine hood, pedestrian protection, multidiscipline design optimization, structure rigidity , NVH (noise-vibration-harshness), SFE Concept, iSight soft wear