Abstract: The main objective of our research is to contribute to the technique of unexploded bomb disposal such as an establishment of evacuation area based on computational mechanics. The computational simulation for undersea explosive problems was designed and demonstrated using Smoothed Particle Hydrodynamics schemes by HyperWorks (Altair®)–RADIOSS® software. The technique was to reveal the fragment behavior such as the amounts of charge and seabed soils. In this report, a study about the effect of a 50 kg general-purpose bomb and sea depth on the shock wave phenomena is presented. As a result, by conducting a series of computational simulations, it was observed and visualized that the fragment behavior significantly depends on charge amounts, depth of sea, and seabed soil.
Key Word:Unexploded Ordnance, Computational Simulation, Seabed Soil, SPH
[1]. Okinawa Unexploded Bomb Disposal Council, The Explosive Ordnance Disposal in Okinawa, Shimatatei, 32 (2005), 6-11. (in Japanese)
[2]. Executive Office of the Governor of Okinawa, The Explosive Ordnance Disposal Results in Fiscal Year 2018, 1st Conference of the Okinawa Unexploded Bomb Disposal Council in 2019, Trans., (2019.6), 1-2. (in Japanese)
[3]. Y. Higa,H. Iyama, T. Tamaki, S. Itoh, A Computational Simulation for Explosive Ordnance Disposal, Mat. Sci. Forum, 767 (2014), 74-79.
[4]. Y. Higa, H. Iyama, K. Shimojima, M. Nishi and S. Itoh, Experimental Study and Computational Simulation for Shock Characteristics Estimation of Okinawa's Soils Jahgaru, The Int. J. Multiphysics, 11(3) (2017), 245-253.
[5]. Y. Higa, H. Iyama, K. Shimojima, O. Higa and S. Itoh, Experimental observation for dynamic characteristics of ShimajiriMahji, The Int. J. Multiphysics, 13(3) (2019), 241-251.
