Home / Examples / Piezoelectric Analysis [Rayleigh] / Example 2: Harmonic Analysis

Example 2: Harmonic Analysis

General

• The model is a piezoelectric disc.
  The AC voltage applied across the top and bottom faces generates the spreading vibration.
   

• The device's displacement is solved.
   

• Unless specified in the list below, the default conditions will be applied.
   

• Obtain this session's project file. (Right-click and choose 'Save link as')




• Results will vary depending on Femtet version and the PC environment.

 

Analysis Space

Item	Settings
Analysis Space	3D
Model Unit	mm

Analysis Conditions

 

Item	Settings
Solver	Piezoelectric Analysis [Rayleigh]
Analysis Type	Harmonic Analysis
Options	N/A

 

The harmonic analysis tab is set up as follows.

Tab	Setting Item	Settings
Harmonic Analysis	Frequency	Minimum: 1000 [Hz] Maximum: 1000 [Hz]
	Sweep Type	Select [Linear Step by Division Number] Division: 0

Model

The piezoelectric disc (piezo) is placed on top of the aluminum disc (metal).

The electric potential is specified on the top and bottom faces.

 

Body Attributes and Materials

Body Number/Type	Body Attribute Name	Material Name
0/Solid	metal	001_Al *
1/Solid	piezo	000_P-4 *

* Available from the material DB

Boundary Conditions

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Settings
earth/Face	Electric	Electric Wall	Electric Potential Specified: Electric Potential 0 [V]
hot/Face	Electric	Electric Wall	Electric Potential Specified: Electric Potential 1 [V]

Results

The gradation contour of the displacement is shown below.

The piezoelectric disc's vibration causes the distortion on the aluminum disc.