脆性冰与加筋板接触的近场动力学模拟

摘要

A meshfree method called 'peridynamics' is applied to simulate the progress of interac-tion between level-ice and strengthened plate. The basic theory of bond-based peridynamics and nu-merical methods are briefly introduced.In order to describe structures in both continuous and discon-tinuous areas, the uniform time differential and spatial integral equations were used in peridynamics. A short-range repulsive force was employed to describe interaction force between material points be-longing to different bodies. The elastic-brittle constitutive model was implemented in numerical mod-el considering different compressive and tensile strength of ice. To determine the feasibility and ac-curacy of applying peridynamic method on ice-structure interaction, the results of peridynamic sim-ulation are compared with experiments. The numerical results, including ice force and ice load dis-tribution,agree well with experimental data and ship design assumption.%文章应用了一种被称为近场动力学的无网格方法来模拟层冰与加强板的接触过程.介绍了键型近场动力学的基本理论和数值方法.为了描述物体连续或不连续区域,近场动力学采用了统一空间积分—时间微分方程.短程排斥力用来描述属于不同物体内的物质点之间的相互作用力.考虑到冰的拉伸压缩强度的不同,数值模型中采用了一种弹脆性的本构模型.通过将近场动力学模拟结果与实验对比来确定应用近场动力学方法模拟冰—结构相互作用的可行性与准确性.数值模拟的冰力与冰载荷分布与实验数据和船舶设计假定一致.