SDTbase Contents Functions PDF Index 
Various information are stored in the model.Stack field. If you use a SDT handle referring to a feplot figure, modification of the model and case entries is often easier using cf.Stack calls (see feplot).
Currently supported entry types 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). 
info,map  used to define a normal MAP, see feutil GetNormal for format 
mat  defines a material entry. 
pro  defines an element property entry. 
SE  defines a superelement entry. 
sel  defines a 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 that is a structure with fields

set  metaset is the most recent set format. This structure defines a list of subsets gathered in a main set. The structure has fields

The feutil AddSet commands let you define a set from a selection. metaset is accessible with the Append command option. 
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.' Default damping is only used when no other damping information is available. 
DefaultEta  (discontinued) value to be used as default loss factor should be replaced by DefaultZeta=eta/2. 
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 .data with frequency values. Optional fields are .ID a integer identifier, .unit field giving rad/s,Hz,rev/mn,RPM, .urn giving a text specification of the vector such as @ll{10,100,5000}. f=fe_def('DefFreq',model) is used to obtain the frequency vector in Hz. 
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) can be specified as a structure for unit selection. For example r1=struct('data',250,'unit','RPM');f_hz=fe_def('deffreq',r1) 
OrigNumbering  original node numbering (associated with feutil Renumber command). Two int32 columns giving original and new node numbers. 
StressCritFcn  string to be evaluated for a specific stress criterion, see fe_stress. 
Rayleigh  defines a Rayleigh damping entry. 
MifDes  defines the list of desired response output (see fe2xf). 
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). 
TimeOptStat  gives nonlinear static solver options (see fe_time). 
Currently reserved names for curve entries are
A case type 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 referring to a feplot figure, modification of the case entries is often easier using cf.CStack calls (see feplot).