CEETRON Access from Tech Soft 3D is a toolkit designed to provide a comprehensive mechanism for accessing data from the model and solution results data files of many important commercial finite element analysis (FEA) software systems used in the fields of mechanical computer aided engineering (MCAE) and computational fluid dynamics (CFD).
A data model consisting of the notion of a library - dataset - attribute hierarchy is mapped onto the data structure of all model and solution results data files (libraries). The net result being that CEETRON Access allows a consistent interface to finite element data from many sources. CEETRON Access also provides a “native” library which supports both read and write operations. All library formats, whether native or “external” may be accessed through CEETRON Access in an identical manner. The basic features of CEETRON Access are summarized below.
Direct access to the following input model and output results filesABAQUS input fileABAQUS .fil and .odb data fileAFLR (Mississippi State) grid fileANSYS input (CDWRITE) fileANSYS .rst, .rth and .rfl results filesAUTODYN results filesAltair Engineering HyperMesh ASCII file and H3D fileCEI/EnSight Casefile formatCFX result fileCGNS data baseCOMSOL sectionwise and mph fileCore Technologies CT Core interfaceESI/PAM-CRASH DAISY and ERF filesFEMAP neutral fileFIDAP neutral fileFLUENT Case and data fileGMV fileLSTC LS-DYNA input fileLSTC State and time history databasesMSC/Adams filesMSC/MARC results filesMSC/NASTRAN bulk data input fileMSC/NASTRAN OUTPUT2, XDB, HDF5 output fileMSC/Patran neutral filesNASA/PLOT3D grid, solution and function filesOBJ tesselation filesOpenFOAM databasesPERMAS result filePOLYFLOW mesh and solution filesPTC/Mechanica design study and FEM Neutral FormatIDEAS universal fileSiemens SAMCEF des filesSTAR-CCM results fileTecplot file format3D Systems/STL ASCII text and binary filesVtk legacy file format
Model data consists of node, element and coordinate system information. Element data includes connectivity and type, material and property ids and user element id. Node data includes coordinates and user node id.
Supported finite elements include lines, triangles, quadrilaterals, tetrahedra, pyramids, pentahedra or hexahedra which may be represented by linear, parabolic or cubic shape functions. P-elements are supported as arbitrarily sized cell arrays. Polygons and polyhedra are also supported.
Auxiliary model information such as load and constraint cases, element material and physical properties are available if resident on the external library.
Results data may be maintained at node points, element centroids or element nodes. Scalar, vector and symmetric tensor (stress) data is supported.
All libraries are treated as direct access even if written as sequential binary files (eg using Fortran sequential I/O). Data is accessed and coerced to memory resident data structures only upon request. This eliminates the need for global translation and data duplication and maximizes I/O operations.
Object oriented architecture, written in C.