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Optimization

Crashworthiness optimization, shape optimization

Crashworthiness Optimization

The problem is of a simplified vehicle moving at a constant velocity and crashing into a pole. It illustrates the following features: a simple single iteration optimization, dealing with an infeasible design formulation, use of composite functions, specifying an appended file for the simulation input, trade-off study, use of the LS-DYNA result interface, updating response surface approximations using the Repair feature, and discrete-continuous optimization.

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Coupling ANSA

This example presents the coupling of LS-OPT with a pre-processor (ANSA). A front rail will be tested in crash simulation. The target is to find the best arrangement of its embosses in order to minimize the acceleration that appears in the test. Following features are illustrated: model definition (morphing boxes/parameters), Task Manager sequence definition and the LS-OPT setup.

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Import User Results

The purpose of this example is to import a user-defined table of results into the GUI and to enable an optimization to be conducted using these results. We have the table of results stored in the file AnalysisResults.csv, in which header and data cells are separated by commas. Two header lines are required. The first header line contains the variable names. The second header line contains the variable types. The following lines contain the variable and response values for each design point.

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Full Vehicle MDO

This example illustrates a realistic application of Multidisciplinary Design Optimization (MDO) and concerns the coupling of the crash performance of a full vehicle with torsional stiffness and mode frequency. LS-DYNA is used for explicit crash and implicit NVH and eigenvalue simulations.

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Metal Forming Optimization

This example illustrates an optimization on a metal forming process with LS-OPT.

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Direct Optimization

This example illustrates an optimization on a metal forming process with LS-OPT.

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Multiobjective Optimization

This example illustrates an optimization on a metal forming process with LS-OPT.

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