Validation of finite element modeling approach for a rubber sealed structure by performing experimental modal analysis

摘要

Adhesive bonding usage like rubber seal to assemble the glass in automotive sector is very common to use. However, creating finite element (FE) model of the structures assembled using such rubber seal is still quite difficult due to non-linear behavior of the bonding material. To build a reliable FE model of a vehicle such as Concept V1, which has a unique glazed roof structure, is became necessary. This paper aims to determine whether an acceptable linear FE model can be built for correlating and adjusting the FE models using the measured modal properties of structures. Verification of the FE modeling technique is performed progressively in three step to secure FE models in every steps forward. First of all, it is done by validating the properties of a simple welded structure. Secondly, experimental modal analyses are performed on test body without glass. Finally whole test body is tested to obtain the modal properties. The measured modal data are also used to adjust the properties of effective rubber seal model of the glass in order to minimize the error between the predicted and the measured natural frequencies and mode shapes.