API improvements

In LIRA-FEM 2026, the capabilities of interaction with the system via API have been significantly expanded. To automate routine tasks, generate complex objects, and integrate with external software, LIRA-FEM uses an API based on COM technology.

Key API Features

• Automation of LIRA-CAD: creation of custom nodes for the Generator and development of plugins.
• Input tables: programmatic control of design model data — import, adjustment, and updating via user interface or programmatically using COM technology.
• Reading and visualization: functions for obtaining analysis results and displaying them as mosaic plots, contour plots, and diagrams directly in the model window.
• Versatility: support for any programming languages that work with COM objects: C#, C++, Python, JavaScript (including V8), VBScript, and others.

User Extensions

• The main innovation is loading modules into the address space of the LIRA-FEM process. This gives external developers access to previously closed API functions and allows them to extend the capabilities of the software.

  • Interface customization: embedding custom commands and buttons into the LIRA-FEM ribbon.
  • Calculation cycle management: introducing custom data into the overall task structure and integrating specific algorithms into the calculation “pipeline.”
  • Automated reporting: adding custom sections to the Report Book, including updatable CSV tables and screenshots.
  • Development of new modules: a framework has been created for porting applications as LIRA-FEM extensions.

API LIRA-CAD and LIRA-FEM

• New input tables have been added for setting and adjusting design model data:

  • pile stiffness — FE 57;
  • materials for reinforced concrete structures: bars, plates, concrete, reinforcement;
  • materials for steel sections: material, additional characteristics, selection restrictions;
  • design options;
  • DCF table;
  • structural elements;
  • element unification;
  • soil model: basic, collapsible, swelling, saline, permafrost characteristics, consolidation, creep, boreholes.
• For convenience, a tree-like structure of sections has been added, as well as the ability to simultaneously delete, copy, cut, and paste multiple input tables.