ABSTRACT This paper presents how a linear transformation between two set of mode shapes can be used to predict and expand the measured response of a structure. The method is known as the Local Correspondence Principle and states that a set of mode shapes can be described as another set of mode shapes, as long as there only exists a minor difference between the two set of mode shapes. This if often the case when comparing mode shapes obtained from experiments on a structure with mode shapes from a finite element of the same structure. The method is validated by tests performed on a scaled model of a 4-storey building made of aluminum bars and plates bolted together. The first part of the validation shows how the experimental mode shapes can be expanded, using a combination of the finite element mode shapes. The second part of the validation focus on how the measured response can be calculated in a large amount of DOF´s using the expanded mode shapes.
Conference Proceedings of the Society for Experimental Mechanics Series: Proceedings of the 31st Imac, a Conference on Structural Dynamics, 2013, 2013, p. 347-353
IMAC XXXI A Conference and Exposition on Structural Dynamics, 2013