摘要
由于对物理模型做了大量假设,经验公式在计算船冰碰撞过程中的冰力时存在很多缺点,而且因为没有考虑船舶自身的非线性现象,导致计算结果与真实值存在较大误差。随着有限元技术的发展,使得利用有限元技术模拟海冰与船舶碰撞问题成为可能。海冰本构模型是影响船冰碰撞过程中计算精度的最重要因素,利用MSC.DYTRAN强大的非线性计算功能对海冰的弹塑性模型、弹脆性模型以及Derradji-Aouat多重失效面模型进行模拟,并且对计算结果和相关本构模型进行分析,认为基于应变率和温度并且考虑了静水压力对海冰失效的影响的多重失效面准则更加适合计算高应变率作用下的船冰碰撞问题。
Because of a mass of assumes,there are a lot of disadvantages using empirical formulations to calculate ice loads on ship-ice interaction.Besides,lost sight of the strong nonlinear phenomenon on ship hull,the validity of using existing ice load formulation is surrounded by very high level of uncertainty.The development of finite element method （FEM） made it possible to simulate ship-ice crashing phenomenon.Constitutive modeling of ice behavior plays the most important role in calculation.Numerical simulations of the elastic-plastic criterion,elastic-brittle criterion and Derradji-Aouat multisurface criterion were carried out by using MSC.DYTRAN.Based on the results,the advantages and disadvantages were analysed between different constitutive modeling.Considering the effect of strain rate,temperature and hydrostatic,multi-surface failure criterion is more suitable in numerical simulations of shipice interaction.
出处
《舰船科学技术》
北大核心
2014年第6期20-25,共6页
Ship Science and Technology
基金
国家自然科学基金资助项目(51109046)
国家973发展基金资助项目(2011CB013703)
关键词
海冰
本构模型
船舶
数值模拟
碰撞
sea ice
constitutive modeling
ship
numerical simulation
crash
