Study on equivalent method of unidirectional stiffened plate under implosion load

DOI:	10.11809/bqzbgcxb2023.11.011
Keywords:	stiffened plate; equivalent theory; correction factor; implosion load
Abstract:	To solve complex environment theory calculation method in solving reinforcement bulkhead equivalent thickness accuracy problem. Firstly, based on the numerical results verified by experiments, the accuracy of the theory of mass equivalent and energy equivalent is analyzed by taking the deflection of target plate under the same load as the cut in point. Then, considering the mass equivalent theory and the energy equivalent theory, the correction standard is given to fit the correction coefficient. The results show that the mass equivalent thickness is smaller than the actual equivalent thickness of the stiffened plate, and the deflection error of the mass equivalent thickness is about 12.98%~43.9%, and the energy equivalent thickness is larger than the actual equivalent thickness of the stiffened plate, the deflection error is about 5.73%~18.9% under the working condition. The risk of underestimating or exaggerating the anti explosion performance of stiffened plate is existed when the thickness is solved by these two theories. The results show that the actual equivalent thickness of stiffened plate is between the mass equivalent and the energy equivalent, and the unmodified method has a large error compared with the actual equivalent thickness of stiffened plate. The modified method can be used to calculate the equivalent thickness of stiffened bulkhead quickly.
Issue:	Vol. 44 No. 11 (2023)
Published:	2023-11-28
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