Virtual simulation for the dynamic response of concrete blocks under blast loading

Utilizing advanced visualization techniques to simulate and replicate the response of concrete block under various explosive loads is highly important for investigating and predicting the fragmentation and fracture behaviour of concrete materials. In this paper, a scenario visualization method is introduced that combines virtual simulation and mathematical theoretical modelling, which can vividly characterize the destruction process as well as the damage characteristics of the concrete block subjected to impact. The developed fragmentation theory model, which is based on the theorem of energy conservation, can analyse and predict the fundamental characteristics of secondary fragments of concrete blocks under blast loading, such as the quantity, quality and initial velocity of fragmentation. Furthermore, the movement trajectory and 3D dynamic effects of flying concrete fragments after the explosion were finely simulated in real time via a physics engine, which significantly enhanced the realism and reliability of the visualization. Additionally, to characterize the damage features of the concrete block, a crushing model of the concrete block was established via the Voronoi diagram technique, and the damage levels were given according to the degree of destruction. The developed virtual simulation system not only has the ability to observe the damage process of a concrete block from various perspectives and scales, but also efficiently and accurately analyse and predict the destructive behaviour and dynamic response under impact loads. This system has significant potential applications in architectural engineering design and safety assessment, providing a new perspective for understanding and exploring the mechanisms of destruction and fracture in concrete materials.