Due to the small scale of the short superstructure of the ship,the normal stress distribution along the height of the cross-section does not meet the plane cross-section assumption,and the stress distribution is different from that of the general ship-type superstructure.However,there is no targeted design basis in the specification.Based on a typical short su-perstructure oil tanker,this paper designs a variety of short superstructure schemes to study the normal stress distribution law of the deck of the short superstructure with the help of the finite element method,discusses the influence of the length,height and location of the superstructure,and compares the finite element results with the calculation results of the theoretical for-mula of Шиманский and Кудюмов shows that the two formulas cannot be well applied to the calculation of the deck stress of the short superstructure.Furthermore,a new formula for the normal stress distribution law of short superstructure deck is proposed on the basis of the finite element results and theoretical formulas of each scheme.The exponential function model is used to fit the normal stress of the short superstructure to obtain the formula of the normal stress along the height distribu-tion law of the short superstructure ship type,and the verification results show that the new formula is better applicable,which can provide a theoretical basis for the early design of the strength design of the short superstructure ship type.
关键词
短上层建筑/强度计算/正应力分布规律/指数拟合
Key words
short superstructure/intensity calculation/normal stress distribution law/exponential fitting
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