Updating the behavior engineering model

Contact us if you experience any difficulty logging in.摘要: This paper proposes a simplified finite element model to represent a riveted lap joint in structural dynamic analysis field. Several numerical models are studied with different quantities of rivets (1, 3 and 5) and spring-damper elements (4, 6, 8, 12, 16 and 20) per rivet.In parallel, samples of two aluminum material plates connected by different quantities of rivets (1, 3 and 5) are built and tested in order to be known its modal characteristics – natural frequencies and mode shapes.The purpose of the different settings is to get the best numerical riveted lap joint representation relatively to the experimental one.Present research efforts focus to combine finite element analysis and testing in one common framework.

When actual measurements were used to update the beam model it was found that the beam model does not correlate with the measured behavior, making it impossible to update the beam model in a meaningful way.To investigate this a simplified finite element model of the Pioneering Spirit was created using beam elements, this model provides the predicted behavior.Then sensitivity-based finite element model updating was implemented and applied to the beam model.The detailed model does correlate with measured behavior.By assuming that the method will work similarly for the detailed model as it did for the beam model, it can be concluded that the detailed model can be validated using the current sensor setup for a static case.

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