Abaqus Intelligent Agent: An AI Agent Workflow for Natural Language-Driven Finite Element Simulation

This article introduces the innovative AI Agent project "abaqus-agent", which combines large language models (LLMs) with the Abaqus finite element analysis software to automate the entire workflow from geometric modeling to result extraction. Engineers can complete complex simulation tasks through natural language descriptions, lowering the barrier to using Abaqus, unleashing creativity, and marking a step forward for engineering simulation towards "conversational CAE".

Finite Element Analysis (FEA) is a core tool in modern engineering design, and Abaqus is widely used in aerospace, automotive, civil engineering, and other fields. However, mastering it requires deep professional knowledge and practical experience—operations such as geometric modeling, mesh generation, material definition, and boundary condition setup are complex. The abaqus-agent project introduces AI Agent technology to address these pain points, building an intelligent workflow that understands natural language, executes operations automatically, and repairs errors independently.

Core Functions

Covers the entire simulation lifecycle:

1. Intelligent geometric modeling: Generate/modify models based on natural language, converting vague descriptions into precise CAD operations;
2. Automated mesh generation: Adaptive density (refinement in stress concentration areas), element type selection, quality inspection and repair;
3. Material and section configuration: Call an extensible database to automatically set parameters (e.g., Q235 steel, 6061-T6 aluminum alloy;
4. Boundary conditions and loads: Identify constraints (fixed/symmetric), parse loads (concentrated force/pressure), and plan analysis steps;
5. Job management: Select solvers, parallel optimization, monitor progress and retry on exceptions;
6. Result processing: Extract key data (stress/displacement) and generate visual reports.

Technical Architecture

• Intent understanding layer: LLMs parse instructions, using few-shot prompting to improve accuracy;
• Planning and reasoning layer: ReAct mode decomposes tasks and dynamically adjusts plans;
• Tool calling layer: Encapsulates the Abaqus Python API for interaction;
• Error handling layer: Parses errors, queries knowledge bases, and performs automatic repairs.

Integration and Knowledge Enhancement

Interacts with Abaqus via Python script interfaces, and introduces document retrieval, best practice libraries, and case studies to enhance professionalism.

1. Rapid Proof of Concept: Engineers describe scheme changes, and the Agent automatically updates the model and solves it, shortening the cycle (from hours to minutes);
2. Parametric Design Optimization: Combine algorithms to implement parameter scanning and find the lightest structure that meets strength requirements;
3. Simulation Knowledge Transfer: Encode expert experience into rules to guide junior engineers;
4. Teaching and Training: Act as an intelligent teaching assistant to demonstrate modeling processes, explain principles, and diagnose errors.

1. Complexity of Abaqus API: Build vectorized indexes, Function Calling mechanisms, and code validation layers;
2. Ambiguity in geometric descriptions: Interactive clarification, visual feedback, and common pattern libraries;
3. Complex error handling: Error pattern databases, progressive repair, and retry limits;
4. Resource management: Scale estimation and request confirmation, queue management, and cloud platform integration.

Conclusion

The abaqus-agent achieves a paradigm shift in engineering software interaction, moving from menu operations/script programming to natural language dialogue, lowering the threshold for finite element analysis, and unleashing engineers' creativity.

Future Directions

• Expand multi-physics coupling (thermal-mechanical, fluid-structure interaction);
• Integrate CAD/PLM systems (SolidWorks, CATIA);
• Support digital twins (combining IoT data);
• Collaborative simulation (multi-user interaction); Ultimately, build an engineering intelligent agent ecosystem of "what you say is what you get".