B2000++ Data Structure

This chapter summarizes the B2000++ data structure hierarchy. As the MemCom dataset structure is flat, a hierarchy is obtained with the dataset naming conventions.

Global Datasets

Top-Level Global Datasets

ELEMENT-PARAMETERS

Global element type properties.

NODE-PARAMETERS

Global node type properties table.

ADIR

Top-level dataset. Descriptor contains cases to be solved for. Set contains active branches.

Other Global Datasets

MATERIAL.<mid>

Element material properties

PROPERTY.<pid> Element properties

Element properties

JCTS

Branch connectivity list

LINC[.<eid>]

Linear constraints list

Global Solution Datasets

Global solution datasets apply to all meshes of the model

Global Solution Datasets

FIELDS

Solution fields parameter list

CASE.<cid>

Analysis case description

SOLUTION.0.0.0.<case>

Solution summary

SOLUTION-STAGE.0.0.0.<cid>.<stageid>

Solution stage summary

SOLUTION-STEP.0.<cycle>.0.<cid>

Solution step summary

Mesh (Branch) Datasets

Finite Element Mesh

Required datasets describing the finite element mesh of any branch <br>. These datasets must be defined for every branch referred to by ADIR.

BDTB.<br>

Branch description table describes the type of mesh, elements used, as well as other global information pertaining to the mesh

COOR.<br>

Mesh node coordinates array

NODA.<br>

Node attributes array. Contains node attributes for every node of mesh

ETAB.<br>

Element description (sparse) table. Contains, for every element in mesh, all element data, such as connectivity, material identifier, etc.

Optional datasets describing the finite element mesh of any branch <br>. Applications will check if they are present.

EDGESET.<br>.0.0.<name>

Element edge sets

ELEMENTSET.<br>.0.0.<name>

Element sets

EPATCH.<eid>

Element patches

FACESET.<br>.0.0.<name>

Element face sets

NODE-NORMALS.<br>

Node normals

NODESET.<br>.0.0.<name>

Node sets

Mesh Solution Datasets

Mesh solution dataset apply to branches.

Mesh Solution Datasets

DOF solution field

Solution fields

DOF_INIT.<br>.0.0.<eid>

Initial conditions (dynamic analysis)

DOFD_INIT.<br>.0.0.<eid>

Derivatives of initial condition with respect time

<gname>.<br>.<cycle>.<subcycle>.<cid>

Sampling point field

Mesh Boundary Conditions and Constraints Datasets

NBC.<br>.0.0.<eid>

Natural boundary conditions

EBC.<br>.0.0.<eid>

Essential boundary conditions (constraints)