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What is the significance of the displacement magnitudes in a FREQUENCY analysis ie eigenmode analysis?

April 26, 2017analysis displacement Frequency magnitudes significance

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What is the significance of the displacement magnitudes in a FREQUENCY analysis ie eigenmode analysis?

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They have no special significance. The displacements in a mode shape are not absolute values. These ape not associated with any loading. These represent the shape distribution. Therefore instead of representing some arbitrary scale the shape is normalised. The displacements are normalised to give the largest displacement or rotation to be unity.