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| Simulation and Experimental Study of Structural Responses of Wedge Grillages with Different Stiffness under Free Drop |
| Received:June 27, 2024 Revised:July 21, 2024 |
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| DOI：10.7643/issn.1672-9242.2024.10.013 |
| KeyWord:stiffened plate wedge grillage fluid structure coupling slamming free drop model test |
| Author | Institution |
| JIANG Caixia |
China Ship Scientific Research Center, Jiangsu Wuxi , China;National Key Laboratory of Ship Structural Safety, Jiangsu Wuxi , China |
| XIA Jinsong |
China Ship Scientific Research Center, Jiangsu Wuxi , China;National Key Laboratory of Ship Structural Safety, Jiangsu Wuxi , China |
| CHEN Zhanyang |
Department of Ocean Engineering, Harbin Institute of Technology at Weihai, Shandong Weihai , China |
| JU Xiaoqun |
Department of Ocean Engineering, Harbin Institute of Technology at Weihai, Shandong Weihai , China |
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| Abstract: |
| To analyze the ultimate bearing capacity of the ship bow under the slamming loads, the bow was simplified to a 2D wedge grillage. Based on the Arbitrary Lagrangian-Eulerian (ALE) fluid structure coupling method, a numerical simulation was carried out for the slamming responses of wedge grillages with two kinds of stiffness, and the variation law of slamming pressure and structural plastic deformation at different positions were predicted. To verify the accuracy of the numerical simulation, free-drop tests were conducted on two types of stiffened plates with angle steel and T-profile, respectively. It was shown that the numerical simulation results were in good agreement with the experimental results. The measuring points with the maximum error of plastic strain between experiments and simulations occurred at the panels and web plates of stiffened plates, which was within 17.06% and 17.50%, respectively. Furthermore, under the same slamming loads, the strain values of both models were in the same order of magnitude. Both experimental and simulation results show that the structural response of the stiffened plate with T-profile are greater. This indicates that the ability of T- profile to resist deformation under slamming loads is stronger than that of angle steel. |
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