船舶静力和振动分析中的双壳有限元(英文)

A new finite element for static and vibrationalanalysis of doublehull structures

基于Ｍｉｎｄｌｉｎ板理论提出双壳船舶结构分析的有限单元，它能反映纵桁和肋板的离散性以及各构件的膜力状态．比正交异性板精度高，比平面单元计算量小．文中给出了板架的静力和振动分析算例，并与正交异性板元和平面单元进行了比较，说明此单元性态良好，进一步发展成壳体单元可用于空间船体结构静力、动力分析．

A new finite element formulation is presented to model the double hull structures. It is based on the Mindlin plate theory and takes into account the discrete character of the distribution of girders and transverse webs. Therefore, errors due to the oversimplification of the composite orthotropic plate theory are eliminated. Numerical examples are given regarding both static and vibrational analyses of double hull structures. Comparisons with the results obtained by orthotropic plate elements and plane elements are made. It is shown that the proposed element is very accurate and has better convergence than the orthotropic plate elements.