Model Reduction Techniques for Mechanical Systems

This document is a technical report that discusses model reduction techniques used in the simulation and optimization of complex mechanical systems, particularly focusing on the transition from detailed shell structures to simplified beam elements. The report outlines the challenges associated with this reduction process, especially in maintaining structural fidelity while ensuring computational efficiency. It emphasizes the significance of these techniques in the context of battery electric vehicles, where the high-voltage battery system is a critical component. The document details a streamlined approach developed in collaboration with AUDI, utilizing ANSA's functionalities to facilitate the reduction process. Key steps include preparing areas for beam substitution, generating assembly points, and connecting newly created beams to the remaining structure. The results indicate that this innovative substitution method significantly reduces the time required for optimization while preserving necessary mechanical properties. The report concludes with a discussion on the effectiveness of the approach in achieving satisfactory accuracy for development purposes.