Getting Started
Get a first look at LS-OPTui and the basic procedure of an optimization process.
Info
Info
The info (main) panel has fields for entering problem description and author information.

Solvers
Solvers
The Solver Panel allows the user to define:
- Pre-Processor Package
- Change of input files by a parametric Pre-Processor controlled by design variables from LS-OPT (ANSA, HyperMorph, DEP-Morpher, TrueGrid, User-Defined).
- Solver Package
- Solver Command: LS-DYNA or others (User-Defined)
- Input File: Will be appended to the Command in the Command Line

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Dist
Dist
The probabilistic component of a design variable is described using a probabilistic distribution. The distributions are created without referring to a variable. Many design variables can refer to a single distribution. As statistical distribution you can choose between these types:
Normal, Uniform, Lognormal, Weibull, Beta, User PDF (probability density function), User CDF (cumulative distribution function), Binomial
Add a Distribution

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Var.
Var.
In the Variables Panel you can define or modify variables and choose between different types:
Variable, Constant, Dependent, Noise Variable, Discrete Variable
Add a Variable
Variable means a standard design variable which will be integrated in the optimization process.

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Add a Constant
Constants are used:
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Sampling
Sampling
In the sampling panel you can choose between these metamodels:
Polynomial, Sensitivity, Feedforward Neural Network, Radial Basis Function Network
Furthermore several options and point selections can be selected.

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Histories
Histories
In the Histories panel you can specify time history curves to be extracted from the solver database.

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Responses
Responses
Create a response in the Responses Panel. A response can be a result of a mathematical operation applied to a time history curve, or can be directly extracted using the standard LS-DYNA interface or a user-defined interface.

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Objective
Objective
Specification of the objective (function to minimize) for the optimization problem.

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Constraints
Constraints
Soecitication of constraints (functions to satisfy) of the optimization problem.

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Run
Run
In the Run panel you can start the optimization, specify the number of concurrent jobs or adjust the convergence criteria. The state of completion is monitored.

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View
View
The View panel starts the LS-OPT Viewer for the visualization of the optimization results. For example meta model plots, accuracy evaluation (computed vs predicted), optimization history, ANOVA results (variable screening)....

Fig.1 - Progress of a variable during the optimization process
Stats
Stats
In the DYNA stats panel you can compute various statistics of the LS-DYNA d3plot results and LS-OPT history data for viewing in LS-PREPOST on the FE model. These statistics show:
- The variation of the LS-DYNA results due to the variation of the design parameters.
- The variation of the LS-DYNA results due to bifurcations and other stochastic process events.

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Fringe Plot of the z-displacement of a steel tube being crushed
