Derivation of Mass, Stiffness and Damping Parameters From Experimental Modal Data
نویسنده
چکیده
First, the equations for calculating the full mass, stiffness and damping matrices from modal data are derived. This deviation was first presented in [1]. However, these equations are difficult to solve because the first step of their solution requires matrix inversion of the flexibility matrix to obtain the stiffness matrix. Not only does matrix inversion amplify errors, but the number of linearly independent mode shapes required to yield a non-singular flexibility matrix is beyond the scope of most experimental modal data sets. Further assumptions regarding the modal parameters can simplify the calculations though.
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