Project 1 - 2D meshing on the instrumental Panel
AIM
PERFORM GEOMETRY CLEANUP AND TOPOLOGY OPERATION TO PROPERLY DEFINE SHAPE ,SIZE AND FEATURES OF MODEL IN ANSA WINDOW.
PERFORM MID SURFACE EXTRATION BY MANUAL OFFSET METHOD TO SIMPLYFY THE MODEL FOR FINITE ELEMENT ANALYSIS PROCESS.
GENERATE MESH ON EXTRACTED MID SURFACE OF MODEL WITH REQUIRED MESH GENERATION METHOD.
MODEL INTRODUCTION
The instrument panel of a vehicle is the panel where the dials and switches are located. The trip computer readout is mounted on the instrument panel of the car. The instrument panel is a cluster of gauges and switches that is mounted on the driver's side of the dashboard.
A dashboard (also called dash, instrument panel (IP), or fascia) is a control panel set within the central console of a vehicle or small aircraft. Usually located directly ahead of the driver (or pilot), it displays instrumentation and controls for the vehicle's operation.
OBJECTIVE
- GEOMETRY CLEANUP UNTIL NO TOPOLOGICAL ERROR IN ANSA WINDOW.
- GENERATING MID SURFACE BY OFFSET METHOD AFTER MESURING ALL THICKNESS OF COMPONENTS.
- MESH GENERATION ON MID SURFACE BY BATCH MESH METHOD,SPOT MESH and MANUAL METHOD.
- ALIGNING UNIFORM MESS DISTRIBUTION AND FIX QUALITY.
MESH QUALITY PARAMETERS.
|
S.No |
Quality Criteria |
Value |
|
1 |
Target/Average length |
4 |
|
2 |
Minimum Length |
2 |
|
3 |
Maximum Length |
6 |
|
4 |
Aspect |
3 |
|
5 |
Warpage |
15 |
|
6 |
Skewness |
45 |
|
7 |
Jacobian |
0.7 |
|
8 |
Minimum Quad Angle |
45 |
|
9 |
Maximum Quad Angle |
135 |
|
10 |
Minimum Tria Angle |
30 |
|
11 |
Maximum Tria Angle |
120 |
|
10 |
Tria Percentage |
15 |
PROCEDURE
STEP 1:
Perform geometry clean-up and topology operation.
Single cons are represented as RED lines.
Double cons are represented as YELLOW lines.
Tripple cons are represented as BLUE lines.
Therefore, status of model shows yellow lines which reflects information of stiched surfaces.
STEP 2:
EXTRACTING MID SURFACE BY MANUAL OFFSET METHOD.
Measuring thickness of all components.
Using OFFSET Command for mid surface extraction.
Topo module>>offset>> faces
Performing mid surface extration of dog houses.
Extracting mid surface of sliding ribs.
We can offset faces to middle of its thickness value by Middle command too.
Similarly, we can extract mid surface each component of model by manual offset method.
MID SURFACE OF MODEL.
Assign PID.
Assign Pshell PID to mid surface.
Midsurface meshing is opted for components where the geometry thickness is small when compared with the span length of the components, so if we see most of the automotive structures are of sheet metal and plastics, where the length of the component is large when compared to the thickness, hence for this reason we opt for mid surface extraction and assign the thickness of the component to the elements through properties on components method.
STEP 3:
MESH GENERATION PROCESS
Before mesh generation process we have reset nodal perimeter and macros to average target length of element.
AND, Also reset mesh parameters and quality to generate required discretization of FE model.
Spot Mesh- Meshing algorithm adequate for macro area that have weld spot nodes on surfaces.
Reconstructing new generated mesh with previous improved mesh bounderies to integrate mess flow distributation uniformly to entire components of model.
Batch Mesh Generation:
Batch mesh option can perform variety of geometry cleanup and auto mesh generation automatically in Batch mesh mode by batch mesh manager algorathim.
RESULT OF FE MODEL.
Learning outcome:
- Develops speed and accuracy in performing FEM operations.
- Clear understanding of algorathim of ANSA with respect to accuracy and precision of performing operation.
Conclusion:
FE Model is successfully extracted from CAD model.