摘要
将损伤力学的相关原理引入到船舶常用加筋板结构的稳定性分析中,建立含损伤结构稳定的有限元分析模型。通过引入损伤位置、损伤程度和损伤面积三个独立的损伤参数来描述结构的受损状况,并分别分析它们的变化对结构临界屈曲载荷和屈曲模态产生的影响。对加筋板结构在各种载荷条件下的屈曲行为作了探讨,并通过对典型算例的数值模拟研究了不同损伤状况和不同屈曲模式下结构稳定特征的变异。
The presence of damage in a structure could considerably affect its behaviors. This paper studied the dynamic stability behavior of a damaged stiffened-plate subjected to an in-plane compressive periodic edge load by the finite element method. The influence of parameters such as extent, size and position of damage was discussed. Considering the coupling effect of vibration and buck- ling, numerical analysis of typical examples was carried out. It shows that the presence of damage had a marked effect on the dynamic instability regions.
出处
《中国舰船研究》
2007年第1期24-29,共6页
Chinese Journal of Ship Research
关键词
加筋板结构
稳定性
损伤
屈曲模态
模态变异
stiffened-plate structure
dynamic stability
damage
buckling model
modal variation
