首页|面内循环载荷下基于弹性安定临界状态的船体加筋板极限强度预测公式

面内循环载荷下基于弹性安定临界状态的船体加筋板极限强度预测公式

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[目的]为准确评估船体结构在循环载荷下的极限承载性能,需考虑载荷的循环属性对船体加筋板极限强度的影响.[方法]采用有限元软件ANSYS,对 200 块T型加筋板和扁钢加筋板开展面内循环载荷下达到弹性安定临界状态的极限强度数值模拟;细致考虑船体加筋板在面内循环载荷下的材料鲍辛格效应、焊接初始变形及残余应力;基于加筋板弹性安定临界状态的非线性有限元数值模拟结果,以加筋板无量纲极限强度作为目标函数,以带板和加强筋的柔度系数作为自变量,提出面内循环载荷下基于弹性安定临界状态的船体加筋板极限强度预测公式.[结果]与非线性有限元模拟结果的比较验证了所提公式的准确性.[结论]所做研究对循环载荷下船体加筋板的极限强度评估具有较好的理论与工程意义.
Hull stiffened plate ultimate strength prediction formula based on elastic shakedown limit state under in-plane cyclic loading
[Objectives]In order to accurately assess the ultimate load-bearing capacity of a hull structure under cyclic loading,it is necessary to consider the effects of the cyclic properties of the load on the ultimate strength of hull stiffened plates.[Methods]Finite element software ANSYS is used to carry out the numer-ical simulation of ultimate strength based on the elastic shakedown limit state under in-plane cyclic loading for 200 T-bar stiffened plates and flat-bar stiffened plates.The material Bauschinger effect,welding initial de-formation and residual stresses of the hull stiffened plates under in-plane cyclic loading are considered in de-tail.Based on the stiffened plate nonlinear finite element numerical simulation results of the elastic shake-down limit state,the dimensionless ultimate strength of the stiffened plates is taken as the objective function,the flexibility coefficients of the plates and stiffeners are taken as the independent variables,and a formula for predicting the ultimate strength of hull stiffened plates under in-plane cyclic loading based on the elastic shakedown limit state is proposed.[Results]The accuracy of the formula is verified through comparison with the nonlinear finite element simulation results.[Conclusions]This study has positive theoretical and engineering significance for the ultimate strength assessment of hull stiffened plates under cyclic loading.

in-plane cyclic loadingelastic shakedownhull stiffened platesultimate strength

崔虎威、陈泽民、丁启印、胡润文

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重庆交通大学 航运与船舶工程学院,重庆 400074

内河航运技术湖北省重点实验室,湖北 武汉 430063

重庆高新开发建设投资集团有限公司,重庆 401329

面内循环载荷 弹性安定 船体加筋板 极限强度

国家自然科学基金青年基金资助项目重庆市自然科学基金面上基金项目资助重庆市教委科学研究青年基金资助项目内河航运技术湖北省重点实验室开放基金资助项目重庆交通大学研究生科研创新项目资助

52001040cstc2021jcyjmsxmX0944KJQN202000712NHHY20210042023S0077

2024

10.19693/j.issn.1673-3185.03380

中国舰船研究
中国舰船研究设计中心

中国舰船研究

CSTPCD北大核心
影响因子：0.496
ISSN：1673-3185
年,卷(期)：2024.19(5)