摘要
在对结构防爆能力的数值分析中,考虑所有迎爆加强筋的耦合,会大大增加建模工作量及计算时间。为提高计算效率,对局部板架结构中处于迎爆状态的纵向加强筋采用全耦合、不耦合及部分耦合等多种耦合程度的建模。并基于MSC.Dytran有限元分析软件,计算迎爆加强筋的耦合程度对结构响应及计算时间的影响,得到迎爆加强筋对耦合程度问题的简化。研究结果表明:在适当的情况下,一些耦合程度较低的建模方式仍可以保证计算精度,同时减少建模工作量和提高数值计算效率。
In numerical analysis of hull structure＇s anti-explosion capability, if coupling of all stiffeners facing blast load is considered, the workload of model-building and computational efficiency, the longitudinal stiffeners in local computing time will increase severely. In Order to improve grillage structures facing blast load were modeled with different coupling level, such as, entirely coupled, uncoupled and partially coupled. Based on MSC. Dytran, the influence of coupling level on structure response and computational time was analyzed, and the feasible way of simplified coupling level was acquired. The results indicated that under proper situations, models with lower coupling level can ensure computational accuracy, and reduce the workload of model-building, and increase computational efficiency simultaneously.
出处
《振动与冲击》
EI
CSCD
北大核心
2012年第23期12-15,31,共5页
Journal of Vibration and Shock
关键词
耦合程度
耦合面
加强筋
迎爆
可行性
coupling level
coupling surface
stiffener
facing blast load
feasibility
