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Published byPrimrose Rosalind Paul Modified over 7 years ago
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Lagouge TARTIBU KWANDA Mechanical Engineering
ON THE USE OF PARAMETRIC OPTIMIZATION OF A ROBOT BASE ASSEMBLY MODEL USING FEA Lagouge TARTIBU KWANDA Mechanical Engineering
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Outline Introduction The Phases or Processes of Design
Finite element analysis (FEA) Robot base assembly optimization Results
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Introduction
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Engineering design: Car design
Customers: Maximum reliability at lower cost Designers: Maximum reliability results in higher cost Engineering design: Car design Conflicting criteria
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The worst case scenario is used to dimension the structure
Structural analysis The worst case scenario is used to dimension the structure Load 1 Load 2 Load 3 Multiple scenario
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The Phases or Processes of Design
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Analysis and Optimization
This is the breakdown and improvement stage of the design solution. The analysis may reveal that the system is not an optimum solution. If the design fails the tests, the synthesis procedure must begin again, hence becoming an iterative process.
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Finite Element Analysis
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Finite Element Analysis (FEA)
CAD models 3D models Design specifications Materials Loads Constraints Meshing Results Von Mises Stress Displacement Finite Element Analysis (FEA)
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AUTODESK INVENTOR Dynamic simulation: Dynamic characteristics
Optimization: Optimum solution Modal analysis: Natural frequencies Stress analysis: Von Mises stress Displacement
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Robot base assembly optimization
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Objective: optimization of members width
Base plate Members Robot base
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Problem formulation Minimize the mass of the structure while keeping stress and displacement within allowable values.
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(2) FEA steps (3) (1) (4) (5)
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Results
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Convergence results Convergence rate Von Mises Stress Solution steps
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Design configurations 1
Von Mises Stress Displacement
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Design configurations 2
Von Mises Stress Displacement
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Design configurations 3
Von Mises Stress Displacement
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Solutions comparison: Von Mises Stress
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Solutions comparison: Displacement
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Selection of the best solution
1 2 3
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Looking Ahead: FEA as a design aid...
In this illustration, FEA is used to: Create a simulation. Specify materials, constraints, and forces. Specify parametric dimensions and generate configurations. View different configurations as 3D colour plots and XY plots.
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Thank you!
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