Abstract
Keywords: frequency response functions based substructuring, optimization, design of experiments, response surface modeling
The goal of this paper is to optimize the acceleration level at the driver and passenger seats by optimization on FRF Based Substructuring (FBS) -Transfer Path Analysis (TPA). Three components will be coupled: a trimmed body (vehicle), a frontcradle and a rearcradle. A forced response solution is computed based on the overall FRF of the assembled system. The acceleration levels at the seats of the driver and passenger are too high and it focuses to optimize them by modifying the connection properties. In order to see the effect of the modification of the bushings on the response values, some sensors on the force response solution are included in the model. It follows the parameterization of the optimization analysis. Design Of Experiments (DOE) it performes to explore the design space. Models (Response Surface Modeling) will be created to predict the response for a combination of parameters. The design is optimized using the prediction surface. The best point of the global optimization is used as the starting point for the local methods to perform a refinement of the optimum.