MSC Nastran Thermal > Supported Commands > 3.4 Bulk Data Entries
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3.4 Bulk Data Entries
The following MD Nastran Bulk Data entries are supported.
 
Description
CBAR
Defines a simple beam element. (p. 60)
CBEAM
Defines a beam element. (p. 62)
CBEND
Defines a curved beam, curved pipe, or elbow element. (p. 61) (p. 62)
CDAMP1
Defines a scalar damper element. (p. 60)
CELAS1
Defines a scalar spring element. (p. 60)
CHBDYG
Defines a boundary condition surface element without reference to a property entry. (p. 71)
CHBDYP
Defines a boundary condition surface element with reference to a PHBDY entry. (p. 63), (p. 71)
CHEXA
Defines the connections of the six-sided solid element with eight to twenty grid points. (p. 65)
CONROD
Defines a rod element without reference to a property entry.(p. 110)
CONV
Specifies a free convection boundary condition for heat transfer analysis through connection to a surface element (CHBDYi entry). (p. 81), (p. 85), (p. 90)
CONVM
Specifies a forced convection boundary condition for heat transfer analysis through connection to a surface element (CHBDYi entry). (p. 82), (p. 87), (p. 90)
CORD2C
Defines a cylindrical coordinate system using the coordinates of three points. (p. 51)
CORD2R
Defines a rectangular coordinate system using the coordinates of three points. (p. 51)
CORD2S
Defines a spherical coordinate system using the coordinates of three points. (p. 51)
CPENTA
Defines the connections of a five-sided solid element with six to fifteen grid points. (p. 65)
CQUAD4
Defines an isoparametric membrane-bending or plane strain quadrilateral plate element. (p. 64)
CQUAD8
Defines a curved quadrilateral shell or plane strain element with eight grid points. (p. 64)
CROD
Defines a tension-compression-torsion element. (p. 60)
CTETRA
Defines the connections of the four-sided solid element with four to ten grid points. (p. 65)
CTRIA3
Defines an isoparametric membrane-bending or plane strain triangular plate element. (p. 64)
CTRIA6
Defines a curved triangular shell element or plane strain with six grid points. (p. 64)
CTRIAX6
Defines an isoparametric and axisymmetric triangular cross section ring element with midside grid points. (p. 65)
CTUBE
Defines a tension-compression-torsion tube element. (p. 63)
DLOAD
Defines a dynamic loading condition for frequency response or transient response problems as a linear combination of load sets defined via RLOAD1 or RLOAD2 entries for frequency response or TLOAD1 or TLOAD2 entries for transient response. (p. 66)
INCLUDE
Inserts an external file into the input file. The INCLUDE statement may appear anywhere within the input data file. (p. 109)
MAT4
Defines the constant or temperature dependent thermal material properties for conductivity, heat capacity, density, dynamic viscosity, heat generation, reference enthalpy and latent heat associated with a single phase change. (p. 53)
MAT5
Defines the thermal material properties for anisotropic materials. (p. 53)
MATT4
Specifies table references for temperature-dependent MAT4 material properties. (p. 53)
MATT5
Specifies temperature-dependent material properties on MAT5 entry fields via TABLEMi entries. (p. 53)
MPC
Defines a multipoint constraint equation of the form. (p. 50)
NLPARM
Defines a set of parameters for nonlinear static analysis iteration strategy. (p. 123), (p. 133)
PARAM,AUTOSPC
AUTOSPC specifies the action to take when singularities exist in the stiffness matrix [Kgg]. AUTOSPC = YES means that singularities will be constrained automatically. AUTOSPC = NO means that singularities will not be constrained. (p. 114)
PARAM,PRGPST
Controls the printout of singularities. See AUTOSPC. Default = YES. (p. 117)
PARAM,SIGMA
The radiant heat flux is proportional to SIGMA*(Tgrid + TABS)4, where SIGMA is the Stefan-Boltzmann constant. Default = 0.0. (p. 115)
PARAM,TABS
TABS is used to convert units of the temperature input (oF or oC) to the absolute temperature (°R or °K). Default = 0.0. (p. 115)
PBAR
Defines the properties of a simple beam element (CBAR entry). (p. 60)
PBEAM
Defines the properties of a beam element (CBEAM entry). This element may be used to model tapered beams. (p. 62)
PBEND
Defines the properties of a curved beam, curved pipe, or elbow element (CBEND entry). (p. 61) (p. 62)
PCONV
Specifies the free convection boundary condition properties of a boundary condition surface element used for heat transfer analysis. (p. 81), (p. 85), (p. 90)
PCONVM
Specifies the forced convection boundary condition properties of a boundary condition surface element used for heat transfer analysis. (p. 82), (p. 87), (p. 90)
PDAMP
Specifies the damping value of a scalar damper element using defined CDAMP1 or CDAMP3 entries. (p. 60)
PELAS
Specifies the stiffness, damping coefficient, and stress coefficient of a scalar elastic (spring) element (CELAS1 or CELAS3 entry). (p. 60)
PHBDY
Referenced by CHBDYP entries to give auxiliary geometric information for boundary condition surface elements. (p. 63), (p. 71)
PROD
Defines the properties of a rod element (CROD entry). (p. 60)
PSHELL
Defines the membrane, bending, transverse shear, and coupling properties of thin shell elements. (p. 64)
PSOLID
Defines the properties of solid elements (CHEXA, CPENTA, and CTETRA entries). (p. 65)
PTUBE
Defines the properties of a thin-walled cylindrical tube element (CTUBE entry). (p. 63)
QBDY2
Defines grid point heat flux into CHBDYi elements. (p. 76)
QBDY3
Defines a uniform heat flux load for a boundary surface. (p. 76)
QHBDY
Defines a uniform heat flux load into a set of grid points. (p. 79)
QVECT
Defines thermal vector flux from a distant source into a face of one or more CHBDYi boundary condition surface elements. (p. 77)
QVOL
Defines a rate of volumetric heat addition in a conduction element. (p. 56), (p. 80)
RADBC
Specifies a CHBDYi element face for application of radiation boundary conditions. (p. 96), (p. 97)
RADCAV
Identifies the characteristics of each radiant enclosure. (p. 98), (p. 115), (p. 115)
RADM
Defines the radiation properties of a boundary element for heat transfer analysis. (p. 77), (p. 96), (p. 97), (p. 98)
RADMT
Specifies table references for temperature dependent RADM entry radiation boundary properties. (p. 71), (p. 77), (p. 96), (p. 97), (p. 98)
RADSET
Specifies which radiation cavities are to be included for radiation enclosure analysis. (p. 98)
SLOAD
Defines concentrated static loads on scalar or grid points. (p. 79)
SPC
Defines a set of single point constraints and enforced displacements. (p. 73)
SPOINT
Defines scalar points. (p. 81), (p. 82), (p. 96)
TABLED1
Defines a tabular function for use in generating frequency-dependent and time-dependent dynamic loads. (p. 71)
TABLEM1
Defines a tabular function for use in generating temperature-dependent material properties. (p. 53), (p. 71)
TEMP
Defines temperature at grid points for determination of thermal loading, temperature-dependent material properties, or stress recovery. (p. 75)
TEMPBC
Defines the temperature boundary conditions for heat transfer analysis. Applies to steady state and transient conditions. (p. 73)
TEMPD
Defines a temperature value for all grid points of the structural model which have not been given a temperature on a TEMP entry. (p. 114), (p. 117)
TLOAD1
Defines a time-dependent dynamic load or enforced motion of the form. (p. 66), (p. 71)
TSTEPNL
Defines parametric controls and data for nonlinear transient structural or heat transfer analysis. TSTEPNL is intended for SOLs 129, 159, and 99. (p. 128), (p. 133)
VIEW
Defines radiation cavity and shadowing for radiation view factor calculations. (p. 98)
VIEW3D
Defines parameters to control and/or request the Gaussian Integration method of view factor calculation for a specified cavity. (p. 115)