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A computationally efficient plastic substructure method for multi-scale explosion analysis
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AI
DOI：10.1016/j.ijsolstr.2026.114191.png)
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Abstract
En 中文
Accurate simulation of nonlinear wave propagation in geotechnical media under largescale explosions remains a critical challenge due to the conflicting requirements of mesh resolution and computational cost. To resolve this bottleneck, this study proposes a plastic substructure method that enforces a physical and numerical decoupling between near-field detonation dynamics and far-field propagation. By incorporating an elastic transition layer into the traditional substructure framework, the method effectively isolates the internal path-dependent plastic deformation history from the equivalent load calculation. This innovation permits the truncation boundary of the refined mesh to be significantly contracted from the far-field elastic zone (approximately 120 scaled radii) to the interface of the crushed or plastic zones (approximately 40 scaled radii), thereby drastically enhancing computational efficiency. Comparative validations of 2D crack propagation and 3D wave fields confirm that the proposed method rectifies the severe distortion errors inherent in traditional approaches, capturing complex fracture patterns and nonlinear wave propagation with exceptional fidelity. The established framework offers a theoretically sound and numerically efficient solution for the nonlinear dynamic analysis of large-scale explosions in complex engineering sites under multi-scenario conditions.
Keywords:
Explosion response analysis
Plastic wave field
Explosive source substructure
Equivalent explosive load
Multi-scale analysis
Journal
IF:
3.8
Papers:
1.2W
Citations:
3.3W
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