Abstract
Nowadays, due to the market concurrence in the automotive field and the high customers standards, the acoustic comfort have become the one of the most important engineering require. This paper deals with the NVH test-calculation correlation, the finite element (FE) model updating of an engine and the vibration level (low and medium frequency range) on the engine/body interface points . The main objective for this approach is to obtain the absolutes values of the vibration level (low and medium frequency range) on the interface points using an updated FE model. Experimental and theoretical analysis used for this work, have allowed us to understand the real vibratory behavior and to obtain a new FE model more closed by reality.The final updating, the test-calculation correlation results and also the operational simulation and measurements level are presented within this paper.
Keywords: finite element, automotive engine, NVH, modal analysis, correlation, updating, optimization.