Method For Improving Determination Of Mode Shapes For A Mechanical Structure And Applications Hereof
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United States of America Patent
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Issued Date -
Nov 7, 2013
app pub date -
Mar 13, 2012
filing date -
Mar 30, 2011
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Abandoned
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Abstract
A method for improving determination of mode shapes for a mechanical structure where each mode shape is a vector that consist of a number of components and each vector corresponds to a natural frequency of the structure is based on measurements performed on the structure using signals from a limited number of sensors placed on the structure defining the number of components of each of the mode shape vectors. The measured signals are used to determine a number of mode shapes that are improved by a linear combination of mode shapes comprised of a limited number of the mode shape with frequencies around the frequency of the corresponding mode shape of the model. This allows the modified mode shapes to be accurately expanded to all degrees of freedom in the model. The invention further includes applications of the method on mechanical structures such as wind turbines and bridges.
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