Name

adir — Analysis directives block

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.