Subcases for Different Analysis Types

The default contents of the Subcases branch of the model tree depend on the type of analysis. You can add other subcases as needed and rename the subcases. The default sub-entities for the various analysis types are summarized below. In addition to the listed sub-entities, a Results sub-entity exists for all analysis types.

For Static, Linear Buckling, Prestress Static, Linear Steady State Heat Transfer and Nonlinear Steady State Heat Transfer analyses:

• Subcase 1: Consists of Loads and Constraints sub-entities.

Subcases behave differently between linear and nonlinear solution types. Linear subcases are analogous to completely new and different analyses. Nonlinear solutions use the end of the previous subcase as an initial condition for next subcase.

For Normal Modes analyses:

• Modal Setup: Where you define parameters unique to Normal Modes analyses
• Subcase 1: Consists of Loads and Constraints sub-entities

For Linear Buckling analyses, two subcases are created by default:

• Subcase 1: Initial stress – Linear Static
• Subcase 2: Critical buckling load factor – Linear Buckling

For Prestress Static analyses, two subcases are created by default:

• Subcase 1: Initial stress – Linear Static
• Subcase 2: Stress at operating loads – Linear Static

For Prestress Normal Modes analysis types with two subcases by default:

• Modal Setup: Where you define parameters unique to Normal Modes analyses
• Subcase 1: Prestress condition – Linear Static
• Subcase 2: Normal Modes

For Nonlinear Static analyses:

• Subcase 1: Consists of the Loads and Constraints sub-entities, plus the following:
  • Nonlinear Setup 1: Consists of parameters unique to nonlinear static analysis. A Nonlinear Setup sub-entity also exists in each additional subcase you define.

For Nonlinear Buckling analyses, two subcases are created by default:

• Subcase 1: Initial stress – Nonlinear Static)
  • Nonlinear Setup 1: Consists of parameters unique to nonlinear static analysis
• Subcase 2: Critical buckling load factor – Nonlinear Buckling

For Direct Transient Response analyses:

• Damping 1: Where you define structural, Rayleigh, and Modal damping characteristics
• Subcase 1: Consists of the Loads and Constraints sub-entities, plus the following:
  • Dynamics Setup: Where you define parameters unique to transient response analyses

For Modal Transient Response, Modal Frequency Response, and Random Response analyses:

• Damping 1: Where you define structural, Rayleigh, and Modal damping characteristics
• Modal Setup 1: Where you define parameters unique to modal analyses
• Subcase 1: Consists of the Loads and Constraints sub-entities, plus the following:
  • Dynamics Setup 1: Where you define parameters unique to transient response analyses

For Impact Analysis:

• Impact Setup: In this dialog, you select the projectile body and define the projectile path, initial velocity, and acceleration rate.
• Subcase 1: Consists of Loads and Constraints sub-entities

For Nonlinear Transient Response analyses:

• Damping 1: Where you define structural, Rayleigh, and Modal damping characteristics
• Subcase 1: Consists of the Loads and Constraints sub-entities, plus the following:
  • Dynamics Setup 1: Where you define parameters unique to transient response analyses
  • Nonlinear Setup 1: Consists of parameters unique to nonlinear analyses.

For Direct Frequency Response analyses:

• Damping 1: Where you define structural, Rayleigh, and Modal damping characteristics
• Subcase 1: Consists of the Loads and Constraints sub-entities, plus the following:
  • Dynamics Setup 1: Where you define parameters unique to dynamics analyses

For Multi-Axial Fatigue analysis type:

• Fatigue Setup 1: Where you define parameters unique to fatigue analyses
• Subcase 1: Consists of Loads and Constraints sub-entities. After solving, a Results sub-entity appears with standard linear static stress results.
• Fatigue Results: This second subcase appears after solving the model. It contains a Results sub-entity with the Life Contour and Damage Contour results from the fatigue analysis.

For Vibration Fatigue analysis type:

• Fatigue Setup 1: Where you define parameters unique to fatigue analyses
• Damping 1: Where you define structural, Rayleigh, and Modal damping characteristics
• Modal Setup 1: Where you define parameters unique to modal analyses
• Subcase 1: Consists of the Loads and Constraints sub-entities, plus the following:
  • Dynamics Setup 1: Where you define parameters unique to dynamics analyses

For Nonlinear Transient Heat Transfer analysis type:

• Subcase 1: Consists of the Loads and Constraints sub-entities, plus the following:
  • Time Step 1: Where you define the calculation increments and related parameters for the transient analysis