A Faster Method for Evaluating the Ultimate Strength of Ship Hulls Under Fire Conditions - Fire Idealized Structural Unit Method

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Abstract

An easier and more efficient method is proposed for evaluating the ultimate strength of ship structures under fire conditions. Based on the Ideal Structural Unit Method (ISUM) and experiments from reference literature, a stress and strain formula for stiffened plates under fire conditions, as well as Fire ISUM, are proposed. To verify the effectiveness of the Fire ISUM method, 48 sets of FEA simulations incorporating the Fire ISUM were used to calculate the ultimate strength of different cabin fire positions and temperatures. The results showed that both the simulation and Fire ISUM were able to evaluate the high temperature ultimate strength. However, the Fire ISUM method does not account for initial imperfections due to the use of ideal high-temperature stress-strain curves. As a result, simulation results are lower than those obtained with the Fire ISUM, with a maximum error of 5.24%. To study the influence mechanism of ultimate strength of ship under high temperature conditions, the ultimate strength attenuation factor “IUR” was defined. Simulation results show that the ultimate strength attenuation of different cabins is not only related to the high-temperature width but also to the distance between the deck and the neutral axis. In actual fire rescue processes, when a deck of the same area is subjected to high temperatures, the further the deck is from the neutral axis, the more important its protection.

Author Biographies

Jiaxin Wu, Liaoning Shock Protection and Damage Assessment Technology Engineering Research Center,Shenyang 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

Xingwei Sun 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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2024-12-26

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