Structural Analysis

For Structural Static analysis, select the type of solver:

  • Auto

    • Number of Substeps

      Number of substeps to be used for this load step (the time step size or frequency increment).

    • Large Deformation Key

      If Ignore is selected, than it will not include large deflection effects in a static or full transient analysis. For the Include option, it will be incorporated in the analysis.

  • Direct

    Enter the Number of Substeps and select the Large Deformation Key option.

  • PCG

    This is a Pre-conditioned Conjugate Gradient iterative equation solver. It requires less disk space and is faster for large models.

    Enter the Number of Substeps and select the Large Deformation Key option.

    • Tolerance

      Solver tolerance value (defaults to 1.0e-8).

    • Convergence multiplier

      Multiplier user to control the maximum number of iterations performed during a convergence calculation. The recommended range for the multiplier is 1.0 ≤ multiplier ≤ 3.0.

The Structural Modal Analysis, the following parameters can be defined for the Mode Extraction Method.

Block Lanczos

This is a modal analysis method that is supported in the FEA functionality of Ansys ICEM CFD.

Number of Modes to Extract

Number of modes to extract for the analysis.

Beginning (Lower End) Frequency

Beginning or lower end of the range of frequency. It also represents the first shift point for the eigenvalue iterations.

Ending (Upper End) Frequency

Ending or upper end of the range of frequency. The default value is 1.0E8.

Mode Shape Normalization Key

If set to OFF, it normalizes the mode shape to the mass matrix. If set to ON , it normalizes the mode shapes to unity instead of to the mass matrix.

Constraint Equation Processing Key

There are four options for different constraint equations to be used during analysis: Default, Quick Lagrange, Accurate Lagrange, and Direct Elimination.

Element Calculation Key

Number of modes to expand and write for a modal analysis. If OFF is selected, then it will not calculate element results and reaction forces. If ON is selected, along with the nodal degree of freedom, it also calculates element results and reaction forces.