ABAQUS Keywords Reference Manual  

*DECHARGE
Input distributed electric charges for piezoelectric analysis.

This option is used to input distributed electric charges on piezoelectric elements.

Product: ABAQUS/Standard  

Type: History data

Level: Step  

Reference:

Optional parameters:

AMPLITUDE

Set this parameter equal to the name of the amplitude curve that defines the magnitude of the distributed electric charge during the step. If this parameter is omitted, the reference magnitude is applied immediately at the beginning of the step or linearly over the step, depending on the value assigned to the AMPLITUDE parameter on the *STEP option (“Procedures: overview,” Section 6.1.1 of the ABAQUS Analysis User's Manual).

LOAD CASE

Set this parameter equal to the load case number. This parameter is used only in a *STEADY STATE DYNAMICS, DIRECT analysis; it is ignored in all other procedures. LOAD CASE=1 (default) defines the real (in-phase) part of the loading, and LOAD CASE=2 defines the imaginary (out-of-phase) part of the loading.

OP

Set OP=MOD (default) for existing *DECHARGEs to remain, with this option defining electric charges to be added or modified. Set OP=NEW if all existing *DECHARGEs applied to the model should be removed.

Data lines to define distributed electric charges: 

First line:

  1. Element number or element set label.

  2. Distributed electric charge type label (see Part V, “Elements,” of the ABAQUS Analysis User's Manual).

  3. Reference electric charge magnitude. (Units of CL–2 for surface charges and CL–3 for body charges.)

Repeat this data line as often as necessary to define distributed electric charges for various elements or element sets.