Home / How to Set Body Attribute, Material Property and Boundary Condition / Body Attribute Tabs / Analysis Domain Tab

Analysis Domain Tab

Analysis domains for the body are set up on this tab

It is shown in the [Edit Body Attribute] dialog box. See [How to Set Body Attribute/Material Property].

*If Acoustic analysis is selected, an option here will be displayed as [Acoustic Analysis Setting, □Use directivity calculation method]

Setting Item

Notes

Solver

Selectable for each body attribute.

In the case of the piezoelectric-acoustic coupled analysis, for example, piezoelectric material should not be used in the acoustic analysis,
and the air should not be used in piezoelectric analysis.

An example is in Example 1 Harmonic Analysis at Piezoelectric-Acoustic Analysis.

Birth/Death Setting

Sets body birth and death steps in the stress analysis.

Available for the multi-step analysis/multi-step thermal load analysis in the static analysis.

Refer to [Stress-Static Analysis] of the Technical Notes for detailed birth/death setting.

Prior to the analysis, set up the step analysis on the Step/Thermal Load tab or Step/Thermal Load (Thermal-Stress Coupled) tab.

Click the [Setting in Time Table] button. The Time/Step Table window (Birth/Death tab) will appear.
Enter time, step, initial temperature and reached temperature, and set birth/death status for each step.

"Yes" means "birth. "No" means "death".

There are 3 setting modes as listed below.

Setting mode	Notes
Toggle / Individual setting (default)	Click the state cell of a particular step to toggle the state. This is the default mode.
Toggle / Lump setting	Click the state cell of a particular step to toggle the state. The resulting state will be applied to the subsequent steps as well. To activate this mode, select [Apply the change to the selected step and all the subsequent steps] in the dialog box.
No toggle	The "toggle" function is turned off. That will allow you to copy and paste the states to set repeated birth/death cycles. To activate this mode, select [No state toggle with mouse click. (Allows copy and paste)] in the dialog box.

The Step/Time Table for the birth/death setting can be opened from the Step/Thermal Load tab or Step/Thermal Load tab (Thermal-Stress coupled) too.
The birth/death can be set altogether for the model's body attributes if opened from the Step/Thermal Load tab.
Select [Hide body attributes having no death steps.] to hide the body attributes irrelevant to birth/death setting.

Dead bodies are replaced with low-stiffness material and follow the deformation around them
and the analysis is performed naturally.
Dead bodies can be excluded from the analysis instead of being replaced with low-stiffness dummy material.
Deselect "Replace dead bodies with low-stiffness dummy material" in the nonlinear analysis setting of High-Level Setting tab.

See [Example 10: Multi-Step Thermal Load Analysis for IC Soldering Process] for example.

Meshing Space

Available for creating overlapping meshes when solving contact in the stress analysis (Example 68 of Stress Analysis).

Rigid Body

If [Calculate as a rigid body] is selected, all bodies set to the body attribute will be calculated as one rigid body. If there are multiple body attributes that are regarded as rigid, each body attribute will be treated as an independent rigid body. Available only for the stress analysis.

The rigid body functions similarly when the rigid face is applied to the entire body. See [Mechanical Tab] for the rigid face and see [Example 73] for the usage.

Caution: A Young's modulus input is required, but regardless of the value, the model is treated as a rigid body for the calculation.

Electromagnetic Analysis Setting

If [Correct errors of the electromagnetic field originated in the open boundary] is selected in the Options for electromagnetic analysis of the analysis condition, the electromagnetic field of the body is corrected.

Acoustic Analysis Setting

Selectable for the acoustic analysis or the piezoelectric-acoustic coupled analysis. Not selected as a default setting. The transient analysis is not applicable for this analysis.

If [Use directivity calculation method] is selected, the body field is solved by the directivity calculation instead of the usual FEM. The body must be placed in the opposite side of the driving source across the open boundary.

Material must be specified for the body to analyze but if this item is selected, the specified material is not used for the calculation. This is because the peripheral sound field is obtained assuming the material specified with the open boundary condition spreads around the open boundary covering the body.