Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/151206
Title: Extraction of mode shapes of beam-like structures from the dynamic response of a moving mass
Authors: Zhang, Yao
Wang, Longqi
Zhao, Haisheng
Lie, Seng Tjhen
Keywords: Engineering::Civil engineering
Issue Date: 2019
Source: Zhang, Y., Wang, L., Zhao, H. & Lie, S. T. (2019). Extraction of mode shapes of beam-like structures from the dynamic response of a moving mass. Acta Mechanica Sinica, 35(3), 664-673. https://dx.doi.org/10.1007/s10409-018-0831-7
Journal: Acta Mechanica Sinica
Abstract: This paper proposes an approach to extract the mode shapes of beam-like structures from the dynamic response of a moving mass. When a mass passes through a beam containing several artificially installed humps, its vertical acceleration can be recorded. After applying fast Fourier transformation to the dynamic response, one can extract the mode shapes of the beam. The surface roughness was neglected compared to the humps and its adverse effect on the extraction was reduced. The passing mass performs as both “exciter” and “massage receiver”; therefore, this method requires only one single accelerometer, making it more convenient and time saving in practice. Moreover, to estimate the possible error in extracting mode shapes, a wavenumber domain filtering technique is used to reconstruct the general profiles of mode shapes. Experimental validation of this approach in laboratory scale was conducted. The experimental results show that the proposed method performs well in extracting lower order mode shapes. It should also be noted that the passing mass can not have a very high velocity (e.g. 80 mm/s), otherwise the mass may jump and separate from the beam, and the proposed method may fail to identify mode shapes.
URI: https://hdl.handle.net/10356/151206
ISSN: 0567-7718
DOI: 10.1007/s10409-018-0831-7
Rights: © 2019 The Chinese Society of Theoretical and Applied Mechanics and Springer-Verlag GmbH Germany, part of Springer Nature. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:CEE Journal Articles

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