轴向循环载荷下船体板极限强度研究

Investigations on Ultimate Strength of Ship Plates Under Axial Cyclic Loads

运用7个系列方柱模型模拟船体板构件,对其在轴向循环压缩下的极限强度进行实验研究,并运用非线性有限元方法对实验模型进行了数值分析.研究表明,船体板一次性崩溃压缩极限强度是循环压缩载荷下船体板极限强度的最大值,基于一次性崩溃方法的船体梁极限强度评估体系实际上可能偏于危险.

This paper carried out a series of tests for the ultimate strengths of seven square column models under the loads of cyclic axial compression,which are used to simulate the ship plates.In addition,it conducts numerical analysis to these models by the nonlinear finite element method.The results from the research indicate that ship plate’s compressive ultimate strength based on one-time collapse is the maximum of ship plates’ ultimate strength under the load of cyclic axial compression,and the assessment criteria of hull girder’s ultimate strength based on one-time collapse may overestimate the load bearing capability of actual ship hull structures.