## Synopsis

adir
attributes
end

## Description

The command adir specifies the analysis cases to be processed and commands that apply to all analysis cases. The adir command may only be defined once in a MDL file.

## Required Attributes

case id

Specifies the analysis case to be processed. The identifier id refers to an analysis cases, see the case command.

## General Attributes

add_ssc_elements

Automatically add shell-to-solid coupling (SSC) elements on interfaces between shell and solid elements. See also Shell-to-solid Coupling Elements.

Note that the shell intersection detection algorithm is inhibited if the -iponly option is specified in calling the B2000++ input processor b2ip++.

drills v

The drills factor is used by the MITC shell elements to stabilize the 6th degree-of-freedom (RZ). The default value is 1e-8. See Section 6 for more details.

shell_intersection_angle v

MITC shell elements only: The node type (5 or 6 degrees-of-freedom) is determined in function of topological and geometric properties of the Finite Element mesh, as well as from the essential boundary conditions. The shell_intersection_angle specifies the minimum angle in degrees (default is 30.0) at which elements meet. Thus, nodes of elements joining at an angle greater than v will have 6 degrees-of-freedom. See Section 6 for more details.

Note that the shell intersection detection algorithm is inhibited if the -iponly option is specified in calling the B2000++ input processor b2ip++.

symmetry_plane px py pz nx ny nz

Specifies a symmetry plane by specifying a point (px py pz) of the plane and the normal of the symmetry plane (nx ny nz). Up to 6 symmetry planes can be defined. Note that defining symmetry planes does not entail that the symmetry planes will be used by B2000++. Specific solvers, such as the heat analysis radiation solver, will check for symmetry planes.