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Training:
Relevant data for this tutorial:
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Step 1: Start MSC Apex Generative Design 2020
The program starts and you can directly create your optimization model
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Step 2: Model generation
You can either create the geometry directly in Apex Gennerative Design or import already existing files. You can import .xb, .step, and .sldprt files into the program.
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Nondesign spaces have to be selected using the Optimization Tools. In this case the four fixation points and two force application points are selected and a nondesign space with an offset of 3 mm is created for each.
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Step 3: Definition of boundary conditions
Go to the Loads & Boundary Condition Tool to enter the loads and fixations. Displacements, Forces, Moments, Gravity and Pressure Loads can be applied using different selection options.
Creation of local coordinate systems to apply forces
Because the importet Jet Engine Bracket CAD-file is shifted and rotated to the global coordinate system, local coordinate systems can be used to apply the forces and moments.
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To apply the forces the Loads & Boundary Condition Tool is needed. Select cells on the left side. By disabling the Thunderbolt (tool execution mode selector) on the top, both nondesign spaces can be selected simultaneously. In the Orientation field an external (local) coordinate system can be selected (coordinate system 1).
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Name | Nondesign space | Force/Moment/Pressure/Gravity | Direction (depending on local coordinate system) | Value |
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Force - Moment 1Lennart | Force | Z (Local coordinate system 1) | 35598,00 N | |
Force - Moment 2Lennart | Force | X (Local coordinate system 1) | 37823,00 N | |
Force - Moment 4 | Lennart | Moment | Z (Local coordinate system 1) | 565000 N mm |
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Force - Moment 3 is also applied on both nondesing spaces in z-drection. Now the orientation is referred to the coordinate system 2.
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NameNondesign space | Force/Moment/Pressure/Gravity | Direction (depending on local coordinate system) | Value |
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Force - Moment 3 | Force | Z (Local coordinate system 2) | -42273,00 N |
Four constraints are created and attached on the nondesign spaces (Nummern Lennart):
Name | Direction |
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Constraint 1 | x, y, z (=0) |
Constraint 2 | x, y, z (=0) |
Constraint 3 | x, y, z (=0) |
Constraint 4 | x, y, z (=0) |
Therefore, the Loads & Boundary Condition Tool is needed. Under Displacement Constraints a “clamped” constraint can be chosen, which locks translations in all three directions. On the left side of the Tool the relevant geometry choice can be selected. In this case cells are selected to attach the constaints on the nondesign spaces.
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Step 4: Definition of load cases
The next steps are defined in the Studies area.
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For each Force - Moment an Event is created including all four Constraints:
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Step 5: Definition of optimization parameters
The optimization parameters are selected in the Studies Area as well.
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Don’t forget to save the project!
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Step 6: Starting the optimization and visualize the results
If all data is correct, the optimization can be started and tracked in the Post Processing. The Analysis Readiness function checks if all information are provided and the optimization can start.
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The optimization is finished after 64 iterations (Shape Quality: Balanced (Calculation type: Optimzing)).
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Generative Design
You can always change the Strut Density (Design Type), Maximum Stress and Complexity (SolverMaxMemory) to influence the results and try out different options
The Complexity (SolverMaxMemory) can be increased to realize a higher resolution (increases calculation time!)
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Step 7: Visualization of Stresses & Displacements
Inside the postprocessing the von Mises stress and the displacements are visible for all iterations
The Scale can be influenced individually
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You might also be interested in these tutorials:
More coming soon!