.. _auto_lsdyna_parse_parameters_from_text:

*LS-DYNA PARSE PARAMETERS FROM TEXT*
====================================

Parses *PARAMETER keyword entries from an LS-DYNA input file supplied as raw text (accepted extensions: .k, .dyn, .key, .dyna, .inc) and returns a dataset of named parameters with optional percentage-based variation bounds. Use this worker to extract design variables from an LS-DYNA deck before feeding them into a DOE or optimization workflow.

When to use
-----------

Tagged: ``deck``, ``k_file``, ``keyword``, ``lsdyna``, ``parameter_extraction``, ``parameters``, ``text_parsing``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - LSDYNA Input File
     - file_input_text
     - textarea
     - —
     - ✓
     - Full text content of a valid LS-DYNA input file (extensions .k, .dyn, .key, .dyna, .inc) that contains at least one *PARAMETER keyword block; paste or pipe the raw file text here.
   * - Solver Type
     - solver_type
     - select
     - lsdyna
     - ✓
     - Target solver dialect for parameter parsing; currently only 'lsdyna' is supported — leave at default unless additional solver options are added in future.
   * - Constants
     - constants
     - scalar
     - —
     - 
     - Optional comma-separated list of parameter names to treat as constants (i.e., excluded from variation); leave blank to allow all parsed parameters to vary.
   * - Min Percentage
     - min_percentage
     - scalar
     - 50
     - 
     - Lower bound for parameter variation expressed as a percentage offset below the nominal value (e.g., '50' means −50%); default is 50.
   * - Max Percentage
     - max_percentage
     - scalar
     - 50
     - 
     - Upper bound for parameter variation expressed as a percentage offset above the nominal value (e.g., '50' means +50%); default is 50.
   * - Step Percentage
     - step_percentage
     - scalar
     - 20
     - 
     - Step size between min and max variation as a percentage of the nominal value (e.g., '20' means increments of 20%); default is 20.

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - Parameters
     - parameters
     - dataset
     - Tabular dataset of parsed *PARAMETER entries, each row containing the parameter name, nominal value, and computed min/max/step variation bounds derived from the supplied percentage inputs.

Disciplines
-----------

- cae.preprocessing.deck_authoring
- data.io.file
- design_exploration.doe

.. raw:: html

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   <p style="font-size:11px;color:#888">
   Auto-generated from <code>platform</code> schema. Worker id: <code>lsdyna_parse_parameters_from_text</code>. Schema hash: <code>fa88ddd864d4</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
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