Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Study on the damage effect of concrete pile under air and underwater explosion
| DOI: | 10.11809/bqzbgcxb2025.03.001 |
| Keywords: | concrete pile; air blast; underwater explosion; dynamic response; damage threshold |
| Abstract: | AUTODYN is used to establish a numerical model for the explosion of concrete pile in different media. The effects of blast shock waves on the dynamic response of concrete pile in air and underwater are studied, and the effects of different amounts of explosives on the dynamic response of concrete pile in air and underwater are compared. The results show that there is a great difference between the propagation characteristics of blast wave in air and underwater in the near detonation area. The propagation speed and attenuation speed of detonation wave in air are faster than that of water. However, the peak value of shock wave pressure of underwater explosion is much larger than that of air explosion, which has stronger potential damage capacity to the concrete pile. The larger the TNT equivalent, the higher the degree of fragmentation generated by the structure, with a threshold of 15 kg TNT equivalent for rail abatis constructed of C30 concrete. The research results can provide a basis for the design of offshore defense and a reference for the formulation of accurate offshore barrier breaking schemes. |
| Issue: | Vol. 46 No. 3 (2025) |
| Published: | 2025-03-31 |