Variable Utilities
You can add Variable Utilities () from the Definitions node under the Component (local) nodes. If Group by Type is active, the variable utility nodes appear in the Variable Utilities ( branch.
Right-click Variable Utilities and, or right-click Definitions and, from the Variable Utilities submenu, choose from the following variable utility nodes:
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Matrix: for defining a matrix variable by entering the components of the matrix. See Matrix.
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Matrix Inverse: for computing a matrix inverse from an input matrix. See Matrix Inverse.
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Matrix Diagonalization: for diagonalization of a matrix, computing the eigenvalues and eigenvectors of a symmetric 3x3 matrix from an input matrix. See Matrix Diagonalization.
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Matrix Decomposition (SVD): for computing a matrix decomposition using SVD (singular value decomposition) from an input matrix. This node computes singular values, singular vectors, a rotation matrix, and a stretch matrix from a general 1x1 to 9x9 matrix. See Matrix Decomposition (SVD).
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Participation Factors: for computing modal participation factors. See Participation Factors below.
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Response Spectrum: for computing modal participation factors and setting up data for a response spectrum analysis. See Response Spectrum below.
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Mass Properties: for computing mass properties such as mass, volume, and center of mass. See Mass Properties.