Updating the behavior engineering model
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.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.
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.
Present research efforts focus to combine finite element analysis and testing in one common framework.
Experimental and operational modal analysis and simulation make benefit from common databases.
Some applications presented emphasize the advantages of these techniques.
摘要: In this paper, two experimental techniques, Electronic Speckle Pattern Interferometry and Stroboscopic Interferometry, and two different finite element analysis packages are used to measure or to analyze the frequencies and mode shapes of a micromachined, cross-shaped torsion structure.
Four sets of modal data are compared and shown having a significant discrepancy in their frequency values, although their mode shapes are quite consistent.