Topic
Modal testing
About: Modal testing is a research topic. Over the lifetime, 4047 publications have been published within this topic receiving 64772 citations.
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TL;DR: In this paper, a procedure is outlined for obtaining modal information from total acceleration measurements for the case of base excitation using current software capabilities, however, the modal testing procedure remains the same as for the other experimental setups.
48 citations
TL;DR: In this article, the use of modal description as an alternative method is presented and its contribution to biodynamic modelling is discussed and illustrated using apparent mass data of six male individuals of the same mass percentile.
48 citations
TL;DR: In this article, the authors discuss guidelines for specifying the window for both types of response signal and the effect of the exponential window on the measured system, and the correction for this effect on the estimated modal parameters is developed by utilising the shift property of the Laplace transform.
48 citations
01 Jan 2005
TL;DR: Two new methods based on mass change based on small mass changes in two repeated tests allowing to achieve good accuracy are proposed and the effect of the normalization used in the mode shapes and the accuracy of each method are analyzed by simulation.
Abstract: When the modal model is going to be used for structural modification or for structural response simulation, the scaled mode shapes must be known. If natural input modal analysis is performed, only un-scaled mode shapes can be obtained and an extra method is necessary to obtain the scaling factor. In this paper, two new methods based on mass change are proposed. The first method involves small mass changes in two repeated tests allowing to achieve good accuracy. The second method involves only one mass change and enables the scaling factors of both the modified and unmodified mode shapes to be obtained. Finally, the effect of the normalization used in the mode shapes and the accuracy of each method are analyzed by simulation.
48 citations
TL;DR: In this article, the effects of the eccentricity, hole size and boundary condition on vibration modes are investigated systematically through both global and local analyses, and the results reveal good agreement with those obtained by numerical analysis.
48 citations