Simplified Approach for Assessing the Explosive Residual Strength of Ship Hulls

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Abstract

To evaluate the residual strength of the ship after an explosion, the explosion Smith method is proposed. The innovation of the explosion Smith method mainly lies in two aspects: firstly, it is based on the Baker shock wave and quasi-static pressure model, as well as the Jones critical velocity model, to propose a theoretical method for assessing the range of explosion damage inside cabin and validated through experiments referenced in the literature. Secondly, proposes the strain-stress relationship of the deformation element. In order to verify the feasibility of the explosion Smith method and study the influence of TNT location and mass on the residual strength of ships,16 sets of simulations and theoretical calculations were conducted. The results showed that the residual strength of the ship is most impacted when the TNT is close to the top deck. When TNT is located in the side compartment, the impact of the explosion products discharged from the compartment on the residual strength of the ship is reduced. The trend of residual strength after the explosion calculated by the explosion Smith method and simulation were consistent, but the result obtained from the explosion Smith method was more severe. This is because the strain-stress relationship of the deformation element tends to be more stringent, resulting in the explosion Smith method yielding smaller results than the simulation. However, as the TNT mass increases, the deformation of the ship increases and the error gradually decreases. In the future, more detailed research can be conducted on the mechanical properties of deformed structures under explosive conditions to enhance the accuracy of the explosion Smith method.

Author Biographies

Jiaxin Wu, Liaoning Shock Protection and Damage Assessment Technology Engineering Research Center,Shen Yang university of technology

Jiaxin Wu is a doctoral student at Shenyang University of Technology. My main research direction is the evaluation method of residual strength of ship hulls after explosions and fires.

Ming Yan , Liaoning Shock Protection and Damage Assessment Technology Engineering Research Center,Shenyang University of Technology

Ming Yan is president of the Institute of Science and Technology at the Shen Yang University of technology. He completed his PhD studies mechanical engineering at the Northeastern University, and has been awarded second prize for scientific and technological progress in Liaoning Province. He has published 60 papers in various journals, and serves as a standing director for Liaoning Society of Vibration Engineering. His teaching disciplines include Shock measurement, Damage assessment method, and his interests include Impact protection methods and technologies, Damage assessment method.

Xingwei Sun, Liaoning Shock Protection and Damage Assessment Technology Engineering Research Center,Shenyang University of Technology

Sun Xingwei is professor and doctoral supervisor at the School of Mechanical Engineering, Shenyang University of Technology. She is an academic leader in the field of mechanical engineering and a researcher at the Liaoning Major Equipment Manufacturing Collaborative Innovation Center under the National 2011 Plan. The current director of the Key Laboratory of Complex Surface Numerical Control Manufacturing Technology in Liaoning Province, serving as the Deputy Secretary General of the Machine Tool Professional Committee of the Production Engineering Branch of the Chinese Society of Mechanical Engineering, a member of the China Machinery Industry Excellent Engineer Education Alliance and the Intelligent Manufacturing Professional Committee, and a member of the Online Testing Technology Professional Committee of the China Metrology and Testing Society. Recipient of the State Council Government Special Allowance, honored with titles such as Outstanding Science and Technology Worker in Liaoning Province, Outstanding Teacher in Liaoning Province, Outstanding Science and Technology Worker in Shenyang City, and Outstanding Graduate Supervisor in Shenyang Universities.She Published over 50 academic papers in core journals, including more than 30 papers indexed in SCI and EI; Independently supervised 49 master's students and 5 doctoral students.

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2024-09-04

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