Calculation method for the shock dynamic moment on a ship subjected to underwater explosion load based on the PTTM method and real-scale ship tests

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (22) : 1-7.

YU Fulin1,2，JI Lingling1，LIU Liangtao3，WANG Hui4

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Abstract

A calculation method for the shock dynamic bending moment on a ship subjected to underwater explosion was studied.Based on the discrete time transfer matrix method combined with the non-homogeneous precise integration method, the hull beam was equivalent to a variable cross-section beam, and the precise time transfer matrix (PTTM) of shock dynamic bending moment of the ship beam model subjected to underwater explosion was constructed.In consideration of the boundary conditions, the shock dynamic bending moment was calculated.Meanwhile, shock dynamic bending moment tests of a real-scale ship subjected to underwater explosion were conducted.The calculation results were compared with the full-scale warship underwater explosion test values, and the proposed method was verified.

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precise time transfer matrix (PTTM) method / underwater explosion / shock dynamic bending moment / full-scale ship test

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YU Fulin1,2，JI Lingling1，LIU Liangtao3，WANG Hui4. Calculation method for the shock dynamic moment on a ship subjected to underwater explosion load based on the PTTM method and real-scale ship tests[J]. Journal of Vibration and Shock, 2020, 39(22): 1-7

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