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Contents
Functions
Index
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Various information are stored in the model.Stack field. If you use a SDT handle refering to a feplot figure, modification of the model and case entries is often easier using cf.Stack calls (see feplot).
Currently supported entries in the stack are
| case | defines a case : boundary conditions, loading, ... |
| curve | curve to be used for simulations (see fe_curve) |
| info | non standard information used by solvers or meshing procedures (see below) |
| mat | defines a material entry |
| SE | defines a superelement entry. |
| sel | defines an element selection |
| seln | defines a node selection. Typically a structure with fields .ID giving the reference number and .data giving either node numbers or a node selection command. |
| set | defines a set. Typical sets are lists of node or element identifiers (structure with fields .ID and .data) or edge/face references (structures with fields .ID giving the reference number and .data with two columns giving EltId and edge number, as detailed in integrules. Sets can be used to define loaded surfaces. The optional field .type can specify the nature of the set: NodeId, EltId, FaceId or DOF. feutil AddSet commands let you define a set from a selection. |
| pro | defines an element property entry |
Currently reserved names for info entries are
| DefaultZeta | value to be used as default modal damping ratio (viscous damping). The default loss factor if needed is taken to be twice that value. |
| EigOpt | gives real eigenvalue solver options (see fe_eig). |
| FluidEta | Default loss factor for use in vibroacoustic fluid computations |
| Freq | Frequencies given as a structure with field .X with frequency values and .ID a integer identifier. |
| NewNodeFrom | integer giving the next NodeId to be used when adding nodes to the model (used by some commands of feutil). |
| Omega | rotation vector used for rotating machinery computations (see fe_cyclic). |
| OrigNumbering | original node numbering (associated with feutil Renumber command). Two int32 columns giving original and new node numbers. |
| Rayleigh | defines a Rayleigh damping entry |
| MifDes | defines the list of desired response output |
| NasJobOpt | structure with options to be used for automated job runs by the NASTRAN job handler |
| NastranJobEdit | cell array giving a list of job editing commands to be used through a naswrite EditBulk call. |
| TimeOpt | gives time solver options (see fe_time). |
A case defines finite element boundary conditions, applied loads, physical parameters, ... The associated information is stored in a case data structure with fields
| Case.Stack | list of boundary conditions, constraints, parametric design point, and loading cases that need to be considered. A table of accepted entries is given under fe_case. Each row gives {Type,Name,data}. |
| Case.T | basis of subspace verifying fixed boundary conditions and constraints. |
| Case.DOF | DOF definition vector describing the columns of T, the rows of T are described by the .DOF field of the model. |
The various cases are then stored in the .Stack field of the model data structure (this is done by a call to fe_case). If you use a SDT handle refering to a feplot figure, modification of the case entries is often easier using cf.CStack calls (see feplot).
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