Card 9 - EAREAED Edge Area Proportional Conductance

KODE

KODE is the code EAREAED (or 46)

N1

N1 is an element number.

T1

T1 is an edge number, as defined in the diagram associated with the Card 9 - FREEFACE Element Free Face Generation. If the area proportional edge conductance is applied to a beam or axisymmetric shell, then T1 is ignored. If the area proportional edge conductance is applied to a shell or axisymmetric solid, then T1 is the edge number for which the conductance is applied.

T2

T2 is 0.

T3

T3 is the table number referencing TABTYPE and TABDATA Cards that define the temperature distribution of the reference temperature of the conductance.

T4

T4 is 0.

T5

T5 is a length or area proportional nominal convective coefficient or a nominal emissivity for radiative coupling.

For convective coupling, T5 is the nominal convective coefficient divided by the length of the edge of a beam or shell or the revolved area of the edge of an axisymmetric shell or an axisymmetric solid.

For radiative coupling, T5 is the nominal emissivity of the beam, shell, axisymmetric shell or axisymmetric solid element.

T6

T6 = CONVASN convective coupling.

T6 = RADASN radiative coupling.

T7

T7 is the table number referencing TABTYPE and TABDATA cards that defines the variation of the convective coefficient for the CONVASN option, or the variation of emissivity for the RADASN option. T7 is left blank for constant convective coefficient or constant emissivity.

Code example

EAREAED 10 3 0 15 0 2.5 CONVASN
TABTYPE 15 TEMP TIME
TABDATA 15 20.  0.
$ A CONVECTIVE COUPLING OF 2.5 PER UNIT LENGTH IS APPLIED BETWEEN EDGE 3 OF
$ SHELL ELEMENT 10 AND A.  CONSTANT REFERENCE TEMPERATURE OF 20.
EAREAED 20 0 0 25 0 0.5 RADASN 30
TABTYPE 25 TEMP TIME
TABDATA 25 0.   0.
TABDATA 25 10.  1.
TABTYPE 30 COND TEMP
TABDATA 30 0.8  0.
TABDATA 30 1.0  10.
$ A RADIATIVE COUPLING OF NOMINAL EMISSIVITY OF 0.5 IS APPLIED TO BEAM ELEMENT 20.
$ THE EMISSIVITY VARIES FROM 0.8 TO 1.0 AND IS MULTIPLIED BY THE NOMINAL VALUE.
$ THE REFERENCE TEMPERATURE VARIES FROM 0 TO 10.

Notes

When an EAREAED card is specified, a coupling is created from the element to a reference temperature described by table T3. This table can only be expressed as temperature versus time. For constant reference temperature, only one value must be specified in the table.

For the CONVASN option, the convective coefficient is created by multiplying coefficient T5 by the length or area of the element and the interpolated value from table T7 if any. This table can only be expressed as conductance versus temperature.

For the RADASN option, the reference emissivity specified by T5 is multiplied by the interpolated value from table T7 if any. This table can only be expressed as conductance versus temperature.

When a convective or radiative coupling is created at an edge of a shell or an axisymmetric solid, a new beam or axisymmetric shell element is created and used to apply the coupling.