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co-ordinate modal assurance criterion CoMAC
Definition
measure of the correlation of the a given DOF of two different sets of mode shapes over a number of comparable-paired mode shapesNotes
- NOTE 1 The coordinate modal assurance criterion for DOF j is defined as: where is the mode shape coefficient for DOF j for mode r of set A is the mode shape coefficient for DOF j for mode r of set X r is the index of the correlated mode pairs. For example, mode shapes X and A are test and analysis mode shapes, respectively.
- NOTE 2 CoMAC = 1 indicates perfect correlation.
- NOTE 3 The results can be considered to be meaningful only when the CoMAC is applied to matched modes, i.e. for correlated mode pairs.
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