Axial pressure stiffened plate ultimate strength prediction method

Abstract

The invention relates to the technical field of hull beam ultimate bearing capacity prediction, in particular to an axial pressure stiffened plate ultimate strength prediction method, which comprisesfour stages including a linear deformation stage, a buckling instability stage, a nonlinear large deformation stage and a failure stage in the deformation process of an axial pressure stiffened plate,for the four stages, respectively calculating a similarity criterion corresponding to each stage; constructing a model of the stiffened plate according to the parameters of the prototype of the stiffened plate to be predicted and the similarity criterion of the four stages; and predicting the ultimate strength of the prototype according to the model. According to the method, the stiffened plate can be predicted according to the whole deformation process of the stiffened plate under the axial compression condition, so that the similarity prediction precision is improved.

Description

technical field [0001] The invention relates to the technical field of forecasting the ultimate bearing capacity of hull girders, and more specifically, to a method for predicting the ultimate strength of an axially-compressed stiffened plate. Background technique [0002] The buckling failure mechanism of the hull girder is quite complicated, because the stiffened plate frame constituting the hull girder has multiple buckling collapse forms, and there are both geometric nonlinearity and material nonlinearity from the beginning of buckling to the final complete collapse stage, so Until today, with the rapid development of computer technology, a single solution method cannot accurately evaluate the ultimate bearing capacity of the hull girder. Therefore, in order to save costs and study the buckling failure mechanism and deformation history of hull structures more deeply, how to use scaled model tests to predict the ultimate bearing capacity of prototype structures has attrac...

AI Technical Summary

Problems solved by technology

This method can obtain ideal results in engineering, but since these similar conditions are based on the theory of elastic mechanics, the designed scale model can only be similar to the prototype in the stage of small linear elastic deformation; when the structure is in the In the nonlinear large deformation stage, the model cannot fundamentally reflect the buckling failure history of the prototype, which largely limits the accuracy of similar predictions

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