Number of processors : Specify the number of CPUs used for analysis. For a dual core CPU, input 2 processors and for a quad core CPU, input 4 processors to increase the analysis speed.

Element Formulation : Specify the formula applied to the element.
In terms of speed, a faster solution can be obtained in order of Reduced (Efficiency) > Standard (Stability) > Hybrid (Accuracy). In terms of accuracy, a more accurate solution can be obtained in order of Hybrid (Accuracy) > Reduced (Efficiency) > Standard (Stability).

Equation Solver (Structural) : Specify the method for solving a finite element simultaneous equation. If the setting is automatic, the program automatically determines one of the following methods: Multi-frontal, Dense matrix or AMG (Algebraic Multi-Grid).

2D Element Setting (Structure) : The [Unique Shell Normal Generation] function judges two adjacent shell elements to have two different normal directions when the value between the normal direction vectors are larger than the input value. Because the element size is relatively larger than the curvature, if this value is increased for a rough curved mesh, a smooth contour that considers the curvature of the geometry shape can be calculated.
The [Consider Drilling DOF (degree of freedom)] option calculates the stiffness of the in-plane deformation by considering the rotation about the out-plane axis (drilling degree of freedom).