中国舰船研究2024，Vol.19Issue(4)：193-201,9.DOI:10.19693/j.issn.1673-3185.03631
融合有限元理论的DMB方法及其在复杂超大型浮体上的应用
Finite element based discrete-module-beam method and its applications in complex VLFS
摘要
Abstract
[Objectives]This paper integrates the finite element method(FEM)with the discrete-module-beam(DMB)method and improves the derivation of the lumped-mass stiffness matrix in order to efficiently apply the DMB method to complex and compound very large floating structures(VLFS).[Methods]First,3D potential flow theory is introduced to the DMB method to establish the hydroelastic equation.FEM theory is then introduced to discretize each macro-submodule into micro beam elements,and the lumped-mass matrix is then derived on the basis of the sub-structure approach and matrix manipulation.In dealing with complex boundary conditions,the cross-zeros-set-one approach or adding an additional constraint into the total stiff-ness matrix is adopted.In dealing with complex interconnections,the node numbering is first altered and then an additional constraint stiffness matrix is added to the total stiffness matrix.[Results]When the FEM+DMB method is applied to VLFS with fixed/spring-damped boundary conditions and hinged/rigid/spring-damped interconnections,good agreement is shown with the results from the direct method.[Conclusions]The proposed FEM+DMB method can analyze the hydroelasticity of VLFS in complex engineering scenarios with enhanced speed and accuracy.关键词
离散模块梁单元/超大型浮体/固定端/弹簧-阻尼端/弹簧阻尼连接Key words
discrete-module-beam(DMB)/very large floating structures(VLFS)/fixed end/spring-damper end/spring-damper connection分类
交通工程引用本文复制引用
陈永强,张显涛..融合有限元理论的DMB方法及其在复杂超大型浮体上的应用[J].中国舰船研究,2024,19(4):193-201,9.基金项目
国家自然科学基金资助项目(42206227) （42206227）
海南省自然科学基金资助项目(520QN290) （520QN290）
海南省科技计划三亚崖州湾科技城自然科学基金联合项目资助(2021JJLH0062) （2021JJLH0062）
重庆市自然科学基金资助项目(CSTB2023NSCQ-MSX0432) （CSTB2023NSCQ-MSX0432）
上海交通大学深蓝基金项目资助(SL2022PT103) （SL2022PT103）
