Generally speaking, while output from a simulation model can vary, quantities of interest will occur in the same place with relation to labels (or “key text”) that describe those quantities. You will be presented with the Response Location dialog, which gives you several controls for identifying a quantity of interest: To get started, click on the Add Response button and define a response: For the cantilever example problem, we will only expect console output to be generated. You can use either template output files (which will provide more of a guideline) or expected console output (in which case you need to know in advance what you’re looking for). To do this, you can define simple expressions that tell the Dakota GUI what to look for. The Responses page is used for defining your simulation model’s responses based on expected text output. If you make a mistake while defining parameters, click on the parameter in this table and then click Remove Parameter to start over. You will notice that a new parameter definition has been added to the table on the right: Provide a name and default value for your parameter and click OK. Highlight the text that you want to have replaced by Dakota (in this case, “10.0”) and click “Add Parameter.” At runtime, we would want Dakota to replace “10.0” with whatever value it is currently using. You can see “length = 10.0” in the input file. For instance, suppose you want to define a “length” parameter for this model. The Parameters page is used for defining your simulation model’s parameters according to text replacements in the input file template. When you are ready to proceed, click Next. If you are using the provided cantilever example files, this is what the wizard should look like once populated: Console Syntax for This Model – The exact command-line text that should be executed in order to launch your simulation model.You may specify that a generated file should be expected after the simulation has finished running, or that console output should be expected instead of a file.
Simulation definition how to#
This will be needed by the Responses page of the wizard to know how to parse your output and extract quantities of interest from the text. Output – Provide one (or more) template output files for your simulation model.This will be needed by the Parameters page of the wizard to identify which portions of text will be replaced by Dakota in your template input file at runtime. Input – Provide one (or more) template input files for your simulation model.Simulation Model Executable – Provide the path to your external simulation model that Dakota will run.Simulation Model Name – Provide a custom name for your simulation model to identify it later.The controls on this wizard page are as follows: The general idea behind this wizard is to tell the Dakota GUI how to communicate with your simulation model executable. This will cause the Simulation Model Wizard to appear. To get started, click on the New Simulation Model link underneath the Simulation Models table: After creating a blank Dakota project, generally the first step is to define the simulation model that Dakota will be studying.
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