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盐水柱状模型冰弯曲强度数值计算分析

刚旭皓 田于逵 余朝歌 季少鹏 寇莹

刚旭皓, 田于逵, 余朝歌, 等. 盐水柱状模型冰弯曲强度数值计算分析[J]. 中国舰船研究, 2021, 16(5): 1–7 doi: 10.19693/j.issn.1673-3185.02195
引用本文: 刚旭皓, 田于逵, 余朝歌, 等. 盐水柱状模型冰弯曲强度数值计算分析[J]. 中国舰船研究, 2021, 16(5): 1–7 doi: 10.19693/j.issn.1673-3185.02195
GANG X H, TIAN Y K, YU C G, et al. Numerical simulation analysis of flexural strength of columnar saline ice model[J]. Chinese Journal of Ship Research, 2021, 16(5): 1–7 doi: 10.19693/j.issn.1673-3185.02195
Citation: GANG X H, TIAN Y K, YU C G, et al. Numerical simulation analysis of flexural strength of columnar saline ice model[J]. Chinese Journal of Ship Research, 2021, 16(5): 1–7 doi: 10.19693/j.issn.1673-3185.02195

盐水柱状模型冰弯曲强度数值计算分析

doi: 10.19693/j.issn.1673-3185.02195
基金项目: 工信部高技术船舶科研计划资助项目(2017-614)
详细信息
    作者简介:

    刚旭皓,男,1994年生,助理工程师

    田于逵,男,1968年生,研究员

    通信作者:

    田于逵

  • 中图分类号: U674.21

Numerical simulation analysis of flexural strength of columnar saline ice model

  • 摘要:   目的  冰区航行船舶在平整冰层中破冰航行时,弯曲破坏是主要的破坏形式之一,因而对弯曲强度进行研究具有重要的工程实践意义。为针对CSSRC冰水池的模型冰开展数值预报计算,  方法  首先,采用离散元方法(DEM),利用冰力学试验获得计算参数;然后,应用矩形单元对冰层进行离散,引用元胞数组控制力的传递对柱状模型冰的弯曲强度进行数值计算研究,并利用盐水柱状模型冰弯曲强度试验数据对计算结果进行校核,以确保数值计算模型的可靠性。  结果  通过该数值模型计算得到了弯曲强度随速度、宽厚比、长厚比改变的变化规律,由计算结果的误差分析得到了冰样弯曲强度的基本范围。  结论  所提方法可为模型冰力学特性的预报提供参考。
  • 图  1  单元之间的平行粘结模型

    Figure  1.  Parallel bonding model between elements

    图  2  冰单元的编号方式

    Figure  2.  Numbering of ice units

    图  3  用弯曲强度测试悬臂梁的方法示意图

    Figure  3.  Schematic diagram of a test method for cantilever beams using flexure strength

    图  4  弯曲强度计算时历曲线

    Figure  4.  Time history curve of flexure strength calculation

    图  5  小型冰水池内景

    Figure  5.  The interior view of small ice tank

    图  6  弯曲强度试验加载过程及时历曲线

    Figure  6.  Loading process and the time history curve of flexure strength test

    图  7  数值计算与模型试验时历曲线对比

    Figure  7.  Comparison of time history curves between numerical calculation and model test

    图  8  不同加载速率下的计算结果比较

    Figure  8.  Comparison of calculation results at different loading rates

    图  9  冰样长厚比变化时计算结果比较

    Figure  9.  Comparison of calculation results when the ice sample's length-to-thickness ratio changes

    图  10  冰样宽厚比变化时计算结果比较

    Figure  10.  Comparison of calculation results when the ice sample width-thickness ratio changes

    表  1  数值计算参数

    Table  1.   Numerical calculation parameters

    参数数值
    离散单元尺寸/m0.03×0.001×0.03
    弹性模量/GPa0.10
    密度/(kg·m−3)920
    法向接触刚度/(N·m−1)$ 7.8\times {10}^{6} $
    切向接触刚度/(N·m−1)$ 1.6\times {10}^{7} $
    法向粘结强度/Pa$ 6\times {10}^{5} $
    切向粘结强度/Pa$ 6\times {10}^{5} $
    阻尼系数0.375
    单元间摩擦系数0.20
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-11-20
  • 修回日期:  2021-02-18
  • 网络出版日期:  2021-07-15

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