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CAE Fidesys 9.0 Documentation |
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CAE Fidesys 9.0 Documentation |
Three-dimensional analysis of the natural modes and frequencies of splashing of the free surface of a liquid in a tank.
1. Create a cylinder.
On the command bar, select the module for constructing volume geometry (Mode - Geometry, Entity - Volume, Action - Create).
From the list of geometric primitives, select Cylinder.
Set the following parameters:
Height: 36;
Circular;
Radius: 30.
Click Apply.
2. Create a shell surface.
On the command bar, select the module for constructing surface geometry (Mode - Geometry, Entity - Surface, Action - Create).
Select from the list of geometric primitives Copy and Transform.
Set the following parameters:
Surface ID(s): 1;
Uncheck the "Transform Copied Surfaces" box.
Click Apply.
3. Create a shell surface.
On the command bar, select the module for constructing surface geometry (Mode - Geometry, Entity - Surface, Action - Create).
Select from the list of geometric primitives Copy and Transform.
Set the following parameters:
Surface ID(s): 2;
Uncheck the "Transform Copied Surfaces" box.
Click Apply.
4. Merge the curves of the shells.
On the command bar, select the module for constructing geometry (Mode - Geometry, Entity - Curve, Action - Merge).
From the list that appears, select Merge.
Set the following parameters:
Curve ID(s): 3 5.
Click Apply.
5. Cut the bulk part.
On the command bar, select the module for constructing volume geometry (Mode - Geometry, Entity - Volume, Action - Webcut).
From the list that appears, select Coordinate Plane.
Set the following parameters:
Volume ID(s): 1;
XY;
Offset Value: 8.
Click Apply.
6. Delete the top volume.
On the command bar, select the module for constructing volume geometry (Mode - Geometry, Entity - Volume, Action - Delete).
Set the following parameters:
Volume ID(s): 1.
Click Apply.
1. Create a mesh for the shells.
On the command bar, select the surface mesh module (Mode - Mesh, Entity - Surface, Action - Intervals).
From the list that appears, select Approximate Size.
Set the following parameters:
Select Surfaces: 4 5;
Approximate Size: 2.
Click Apply Size.
Click Mesh.
2. Create a mesh for the volume.
On the command bar, select the volume mesh module (Mode - Mesh, Entity - Volume, Action - Intervals).
From the list that appears, select: Automatic Sizing.
Select Volumes: 4;
Approximate Size: 5.
Click Apply Size.
Click Mesh.
1. Set the material for the plate.
On the command panel, select (Mode — Material, Entity — Materials Management).
In the "Material" column, enter the name of the material material 1.
Click Apply.
In the Material Properties column, select the created material, and then drag the desired properties to it from the left column.
Drag the properties and specify their value:
Young's modulus: 2.06e+11;
Poisson ratio: 0.3;
Density: 7850;
Damping coefficient: 0.05.
Click Apply.
2. Set the material for the acoustic environment.
On the command panel, select (Mode — Material, Entity — Materials Management).
In the "Material" column, enter the name of the material Water.
Click Apply.
In the Material Properties column, select the created material, and then drag the desired properties to it from the left column.
Drag the properties and specify their value:
Density: 1000;
Speed of Sound: 1500.
Click Apply.
Close the Materials management window.
3. Create a block for the metal tank.
On the command bar, select the block management module (Mode — Blocks, Entity— Block, Action — Add).
Set the following parameters:
Block ID: 1;
Entity List: Surface;
Entity ID(s): 4 5.
Click Apply.
4. Create a block for the acoustic environment.
On the command bar, select the block management module (Mode — Blocks, Entity— Block, Action — Add).
Set the following parameters:
Block ID: 2;
Entity List: Volume;
Entity ID(s): 4;
Click Apply.
5. Set the parameters of the first block.
On the command bar, select the block management module (Mode — Blocks, Entity — Block, Action — Block properties/parameters).
Set the following parameters:
Block ID(s): 1;
Category: Shell;
Coordinate System: Global Cartesian;
Order: 1;
Set the shell properties by clicking 
.
Set the following parameters:
Material: material1;
Thickness: 0.03.
Click Apply.
Close the Set Shell Properties window.
Click Apply.
6. Set the parameters of the second block.
On the command bar, select the block management module (Mode — Blocks, Entity — Block, Action — Block properties/parameters).
Set the following parameters:
Block ID(s): 2;
Category: Acoustic;
Material: Water;
Order: 1.
Click Apply.
1. Fix the model firmly on the bottom metal surface.
On the command panel, select the boundary conditions module (Mode — Boundary Conditions, Entity — Displacement, Action — Create).
Set the following parameters:
Entity List: Surface;
Entity ID(s): 2;
Degrees of Freedom: Fix All.
Click Apply.
2. Establish contact between the acoustic medium and the steel tank.
On the command panel, select the boundary conditions module (Mode — Boundary Conditions, Entity — Contact, Action — Create).
Set the following parameters:
Auto Selection;
Entity List: Global;
Type: Tied;
Tolerance: 0.0005;
Method: Auto.
Click Apply.
3. Apply splashing water.
On the command panel, select the boundary conditions module (Mode — Boundary Conditions, Entity — Free Surface, Action — Create).
Set the following parameters:
Entity List: Surface;
Entity ID(s): 8.
Click Apply.
4. Set the gravity.
On the command panel, select the boundary conditions module (Mode — Boundary Conditions, Entity — Gravity, Action — Create).
Set the following parameters:
Entity List: Global;
Directions: Z = -10.
Click Apply.
1. Specify the type of task to be solved.
On the command bar, select the calculation settings module (Mode — Calculation Settings, Calculation Settings — Mode Frequency Analysis, Mode Frequency — General).
Choose:
Dimension: 3D;
Number Of Eigenmodes: 10;
Lowest.
Click Apply.
Click Start Calculation.
2. In the window that appears, select the directory where the result will be saved and enter the file name.
3. In the case of a successful calculation, the console displays the message: Calculation finished successfully at "date" "time".
After that, the natural frequencies will be displayed.
1. Open the file with the results. There are three ways to do that.
Click Ctrl+E.
From the main menu, select Calculation. Click Open Results.
Select Results on Command Panel (Mode - Results). Click Open results.
A window will appear FidesysViewer, in which you can read with the results of the calculation.
2. On the command bar, select Filters — Alphabetical —Threshold.
Specify the settings in the filter properties:
Input Array: Block ID;
Minimum: 2;
Maximum: 2.
In the upper panel, select Mode 1: acoustic velocity potential.
Geometry creating, meshing, setting boundary conditions and materials can be performed using the console interface. Below is a link to the program code that allows you to perform the steps described above manual, you only need to specify the full path and name.