Project 1
Aim- To clean the geometry, extract mid surface and then generate mesh for the given Instrument Panel dashboard of a car.
Step1- The given component is imported into ANSA. Topology is done to clean up the model, and the model is refined by changing the length of perimeter elements to 1mm. Then the different parts of the component is checked region by region in order to see if there are any errors. After this a geometry check is done to see the quality of the CAD. Several issues such as triple CONS,cracked CONS, single CONS,needle faces are found. Some of these can be auto fixed by the software, but others have to be manually released individually, and then connected to the required surfaces by using 'Topo' function.
Step2- The next step involves extraction of the mid surface of the component. Since the thickness of the component varies at different locations,auto mid surfacing cannot be applied at once. Only for the regions which have uniform thickness throughout, auto mid can be applied. For the other regions, manually thickness measurement is done, and the mid surface is extracted using the 'Offset' command. After extracting the mid surfaces, several operations such as Extend, Join etc have to be performed to ensure that all the surfaces are connected together. For certain regions such as the doghouses and ribs, mid surface has to be done part by part by using the Offset command, and then extended to the adjoining surfaces to create a single joined surface.
Step3- The next step is meshing the component. The mesh parameters and quality criteria are entered as given.
Different meshing algorithms such as Spot mesh and Best mesh are used in different regions to generate the mesh. Several macro cuts have to be removed and several new cuts have to be made in order to improve the quality of the mesh. Reworking is done to ensure the mesh is error free and does not have any quality issues.
Learning Outcomes-
Proper Mid Surface Extraction of complex components
Meshing of different types of Geometry, ensuring quality criteria are met