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Import cdb II File

A second converter for Ansys CDB files has been added (CDB II). Now, when using File – Import – and selecting the *.cdb format, you can choose between available converter options.

I – the CDB converter from previous versions.

II – the new converter developed for version 8.0.

The CDB II Converter expands the list of supported surface loads and analysis types. It uses a different approach to data processing and serves as an alternative to the existing Ansys CDB I converter.

Table 1 - Conversion of Analysis Types
Analysis Name Ansys Analysis Command CAE Fidesys Conversion Result
Static Analysis Antype,Static Static Calculation
Modal Analysis Antype,Modal Modal Analysis
Harmonic (Frequency) Analysis Antype, Harmic Frequency Analysis
Spectral Analysis Antype, Spectr Spectral Analysis
Buckling Analysis Antype, Buckle Buckling Calculation

 

Table 2 - Conversion of Finite Element Types
Element Type Ansys Element Name CAE Fidesys Conversion Result
Solid Element solid185 First-order solid body
Node count and corresponding element type:
4: tetra4
5: pyr5
6: wedge 6
8: hex8
Solid Element solid186 Second-order solid body
Node count and corresponding element type:
10: tetra10
13: pyr13
15: wedge15
20: hex20
Solid Element solid187 Second-order solid body
Node count and corresponding element type:
10: tetra10
Shell Element shell181 First-order shell
Node count and corresponding element type:
3: mitc3
4: mitc4
Shell Element shell281 Second-order shell
Node count and corresponding element type:
3: mitc3
4: mitc4
Beam Element beam188 First-order beam
Node count and corresponding element type:
2: beam 2
Beam Element beam 189 Second-order beam
Node count and corresponding element type:
3: beam3
Linear Spring combin14 Spring (type: linear spring)
Zero-Length Spring combin14 Boundary condition: DOF constraint with defined stiffness
Combined spring combin40 Spring (type: combined spring)
Lumped Mass Element mass21 Lumped Mass

 

Table 3 - Conversion of Boundary Conditions (hereafter referred to as BCs)
BC Name APDL Command in Ansys CAE Fidesys Conversion Result
Displacements D Перемещения (список сущностей - узлы )
Nodal Forces and Moments F Force, Moment (entity list – Node)
Gravity, Acceleration ACEL Gravity (entity list – Global)
Angular Velocity CGOMEGA Angular Velocity (entity list – Global)
Angular Acceleration DCGOMG Angular Acceleration (entity list – Global)
DOF Coupling (CP) CP Degree-of-Freedom Constraint
DOF Coupling (CE) CE Distance Constraint between entities
Pressure SFERBLOCK Pressure (entity list – triangle, quadrilateral)

 

Table 4 - Conversion of Contact Types
Ansys Contact Type CAE Fidesys Conversion Result
Standard - Rough General contact type
Bonded:
  • Bonded (always)
  • Bonded (initial contact)
Tied contact type
  • No separation (sliding permitted)
  • No separation (always)
Tied Normal contact type

 

Table 5 - Conversion of Contact Calculation Methods
  • Augmented Lagrangian (default)
  • Penalty function
  • Lagrange multiplier on contact normal and penalty on tangent
  • Pure Lagrange multiplier on
  • Contact normal and tangent
 Penalty
Multipoint constraint (MPC) MPC

 

Table 6 - Conversion of Material Physical Properties
Property Name Ansys Property Name CAE Fidesys Conversion Result
Linear elastic isotropic material (Young’s modulus, Poisson’s ratio) Linear Isotropic Material Properties(EX,PRXY) Isotropic Material (Young’s modulus, Poisson’s ratio)
Mass density Density Density
Thermal expansion coefficient Isotropic thermal Secant Coefficient Thermal expansion coefficient