Project 1 - 2D meshing on the instrumental Panel
AIM :- Write a detailed report on your meshing process undertaken on IP model and also mention which method you used to extract the mid-surface along with the reason.
|
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 |
REASON FOR CHOSING THE METHOD FOR MID SURFACE EXTRACTION:-
1. The method used for the extraction of midsurface is CASTING. since the IP model was observed to be very large therefore manual mid surface was no considered for midsurface generation.
2. The instrumentation Pannel model was not closed from one end therefore SKIN OFFSET was not used to extract mid surface.
3. Considering the size of panel was manual offset was not used for the extraction.
PROCEDURE
1. The model was downloaded from the dashboard. it thoroghly studied. And it was found out that there were few anamoly was peresent in the CAD model.
2. The geometrical and Topological correction were performed on the CAD model.The following are the pictures of the actions undertaken on the model:-
3. After correcting the geometry of the cad model. The mesh data was uplaoded.Post this quality criteria was defined for the subject model.
4. Midsurface generation was undertaken on the model.The method chosen for the same was auto mid surface generation which is CASTING. Following are the results of mid surface generation
5. The Finite Elements created after casting mid surface generation was studied and it was found out that few of the are was not properly alligned.
6. The mis alligned entities was the alligned with the help ALLIGN MANAGER.
7. After alignment the action undertaken was the removal of all empty areas aand elements.There were arround 547 Empty perimeters and 389 empty areas. All of them were alligned with neighbouring entity or were redefined.
8. Post alignment action, correction of failed elements and improving of quality criteria was undertaken.The following are the pics showin the condition of failed element after all the process undertaken as mentioned above.
RESULTS :- Following were the results of the project of meshing the instrumentation panel
1. The mid surgfacef generated on the pannel was done with the help of auto mid generation (CASTING).
2. Total no of mesh generated on the model was 44168 Mesh were generated as per the given quality criteria. Out of which 2673 elements were tria elements 41495 were quads. total 40 OFF elements were retained as per the final model.
LEARNING
The following were lessons learnt from the project:-
1. Type of method to be used for mid surface generation to undertaken post studying the geometry and understanding the time taken alloted for the completion. The manual mid surface generation can be used on the model but it would have taken significant time and effort for the completion.
2. All the empty Areas and Perimeters are supposed to realligned prior completig the model.
3. Care should be take while using align manager such that no overlapping elements are to be formed during the process.
CONCLUSION
1. Few of the places where denser Tripple cons are there, few of the OFF elements werre formed. The same can not be altered if required with geometrical and topological alterations.
2. Mesh flow generated with the help of CASTING method is significantly better that any other method.
3. Time consumption for the completion was very less as compared to any other method.