Analysis method of ultimate hull girder strength under combined loads
Analysis method of ultimate hull girder strength under combined loads
复制标题
DOI：
10.1080/17445302.2015.1045271
复制
发表时间：
2015-07
影响因子：
2.1
通讯作者：
Yoshiteru Tanaka;Hiroaki Ogawa;Akira Tatsumi;M. Fujikubo
中科院分区：
文献类型：
--
作者：
Yoshiteru Tanaka;Hiroaki Ogawa;Akira Tatsumi;M. Fujikubo
本研究旨在提出一种弯扭复合作用下船体梁极限强度的分析方法。船体梁采用一系列薄壁梁单元模拟，在梁单元中实现了考虑剪应力影响的板单元和加筋板单元在轴向载荷作用下的平均应力-平均应变关系。首先，在弹性范围内对整个模型的梁模型施加扭矩。在此基础上，采用考虑翘曲应力和剪应力的Smith梁单元法，计算了截面的极限抗弯强度。将该简化方法应用于组合荷载作用下缩尺模型的连续倒塌试验。另一方面，采用非线性显式有限元法（FEM）对试验模型进行了分析。通过与试验和有限元分析结果的比较，讨论了该简化方法的有效性。
The objective of this study is to propose an analysis method of ultimate hull girder strength under combined bending and torsion. The hull girder is modelled by a series of thin-walled beam elements and the average stress–average strain relationship of plate and stiffened panel elements under axial loads considering the effect of shear stress is implemented in the beam elements. First, a torsional moment is applied to the beam model for a whole model within the elastic range. Then, the ultimate bending strength of cross-sections is calculated applying Smith's method to beam elements considering the warping and shear stresses. The proposed simplified method is applied to the progressive collapse tests of scale models under combined loads. On the other hand, nonlinear explicit finite element method (FEM) is adopted for the analysis of the test models. The effectiveness of the simplified method is discussed comparing with the results of experiments and FEM analysis.