Accessing the MemCom Database

The chapter describes how to access data stored on a B2000++ model database. Each section contains Python and in some case C++ API example code. All C/C++ and Python functions can be consulted in the respective manuals. Python database access is described in the MemCom Python module documentation. C and C++ database access functions are described in the MemCom Reference Manual

A MemCom data base (see Introduction) contains datasets describing

• Mesh

• Materials

• Boundary conditions

• Solutions

• Administrative data

Open and Close a MemCom Database

Open the MemCom database ‘scordelis_lo-roof.b2m’ in read-only mode, the memcom.db object giving back the database handle object db:

import memcom
name = 'scordelis_lo-roof.b2m'
db = memcom.db(name + '/archives.mc', 'r')

Close the MemCom database (note that the database handle object db is still there but not anymore accessible):

...
db.close()

Save the current content of the MemCom database (“snapshot”):

...
db.save()

Mesh

To create or load the mesh from the database, get at least the following datasets:

Content of a B2000++ database directory

Name	Type	Description
ADIR	int array	Active branch identifier list.
COOR.<br>	float array	Node coordinates
NODA.<br>	int array	Node parameters.
ETAB.<br>	Array of dict	Element connectivites and attributes.
NLCS.<br> Node-local transformations	int array	Optional local coordinate systems.
TRANSFORMATIONS	float array	Optional transformations (DOF transformations).