Towards Real-time Structural Dynamics Simulation with Graph-based Digital Twin Modelling

TL;DR

This paper introduces a graph-based digital twin framework for real-time structural dynamics simulation, significantly improving accuracy and computational efficiency over traditional methods, and adaptable to various structural topologies.

Contribution

The study presents a novel GDTM framework that enhances physical interpretability and efficiency in simulating diverse structural dynamics using graph models.

Findings

Accurately simulated structural dynamics with NMSE below 0.005 and 0.0015 in numerical and experimental tests.

Achieved over 80-fold speedup compared to finite element methods.

Validated effectiveness across multiple structural topologies.

Abstract

Precise and timely simulation of a structure's dynamic behavior is crucial for evaluating its performance and assessing its health status. Traditional numerical methods are often limited by high computational costs and low efficiency, while deep learning approaches offer a promising alternative. However, these data-driven methods still face challenges, such as limited physical interpretability and difficulty in adapting to diverse structural configurations. To address these issues, this study proposes a graph-based digital twin modelling (GDTM) framework to simulate structural dynamic responses across various spatial topologies. In this framework, the adjacency matrix explicitly represents the spatial relationships between structural vertices, enhancing the model's physical interpretability. The effectiveness of the proposed framework was validated through comprehensive numerical and experimental studies. The results demonstrate that the framework accurately simulated structural dynamics across different topological configurations, with Normalized Mean-Squared Error (NMSE) values consistently below 0.005 in numerical simulations and 0.0015 in experimental validations. Furthermore, the framework achieved over 80-fold improvements in computational efficiency compared to traditional finite element methods (FEM). This research promotes the practical application of graph-based structural dynamics modelling, which has the potential to significantly advance structural performance evaluation and health monitoring.