View by the Directivity Calculation Methodexamples|products|Murata Software Co., Ltd.

Example8 View by the Directivity Calculation Method

General

 

  • View the analysis results by the directivity calculation method.

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

Analysis Space

Item

Settings

Analysis Space

3D

Model unit

mm

 

 

Analysis Conditions

 

Item

Settings

Solver

Acoustic Analysis [Mach]

Analysis Type

Static analysis

Options

N/A

 

 

Tab

Setting Item

Settings

Harmonic Analysis

Frequency

Minimum: 5[KHz]

Maximum: 5[KHz]

 

Graphical Objects

The model is to observe how the speaker’s sound travels for 1-meter distance in the air.

 

An area is extracted from the spherical ambient air for a speaker’s domain. Therefore, a body of speaker does not exist. The driving source is set at the pressure of 1 [Pa]. For easy viewing of the inside of the model, the open boundary condition is hidden. The directivity domain consists of two sheet bodies.

 

 

 

Body Attributes and Materials

Body Number/Type

Body Attribute Name

Material Name

2/Solid

Air

000_Air(*)

5/Solid

Air

000_Air(*)

6/Solid

Air

000_Air(*)

9/Sheet

OUTSIDE

000_Air(*)

10/Sheet

OUTSIDE

000_Air(*)

* Available from the Material DB

 

 

Body Attribute Name

Analysis Domain

OUTSIDE

Select “Use directivity calculation method”

  • If “Use directivity calculation method” is selected, such body will be recognized as the domain for the directivity calculation. The material “000_Air” is specified for this body but not used for the calculation. The simulation is performed assuming that the body material with open boundary condition exists in the outside of the boundary.

 

Boundary Conditions

Boundary Condition Name/Topology

Tab

Boundary Condition Type

Settings

F/Face

Acoustic

Pressure

1[Pa]

Open/Face

Acoustic

Open boundary

 

 

 

Results

The contour of the directivity domain has been made.

The sound pressure distribution in the wide space can be observed by using the directivity domain.