Nastran Analysis Interface Module (AIM)
Natran Analysis Interface Module (AIM)
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AIM Outputs

The following list outlines the Nastran outputs available through the AIM interface.

  • EigenValue = List of Eigen-Values ( $ \lambda$) after a modal solve.
  • EigenRadian = List of Eigen-Values in terms of radians ( $ \omega = \sqrt{\lambda}$ ) after a modal solve.
  • EigenFrequency = List of Eigen-Values in terms of frequencies ( $ f = \frac{\omega}{2\pi}$) after a modal solve.
  • EigenGeneralMass = List of generalized masses for the Eigen-Values.
  • EigenGeneralStiffness = List of generalized stiffness for the Eigen-Values.
  • Objective = Final objective value for a design optimization case.
  • ObjectiveHistory = List of objective value for the history of a design optimization case.
  • Mass = Total mass of the model.
  • CG = Center of gravity of the model.
  • Ixx = Moment of inertia
  • Iyy = Moment of inertia
  • Izz = Moment of inertia
  • Ixy = Moment of inertia
  • Izy = Moment of inertia
  • Iyz = Moment of inertia
  • I_Vector = Moment of inertia vector

    \[
   \vec{I} = \begin{bmatrix} I_{xx} & I_{yy} & I_{zz} & I_{xy} & I_{xz} & I_{yz} \end{bmatrix}
 \]

  • I_Lower = Moment of inertia lower triangular tensor

    \[
 \vec{I}_{lower} = \begin{bmatrix} I_{xx} & -I_{xy} & I_{yy} & -I_{xz} & -I_{yz} & I_{zz} \end{bmatrix},
\]

  • I_Upper = Moment of inertia upper triangular tensor

    \[
 \vec{I}_{upper} = \begin{bmatrix} I_{xx} & -I_{xy} & -I_{xz} & I_{yy} & -I_{yz} & I_{zz} \end{bmatrix},
\]

  • I_Tensor = Moment of inertia tensor

    \[
\bar{\bar{I}} =
 \begin{bmatrix}
   I_{xx} & -I_{xy} & -I_{xz} \\
  -I_{xy} &  I_{yy} & -I_{yz} \\
  -I_{xz} & -I_{yz} &  I_{zz}
 \end{bmatrix}
\]

  • MassProp = JSON String Mass Properties
  • MassPropLink = Mass Properties Mass properties that can be linked to analysis input MassPropLink