[1]张金利,郝佳伟.鱼雷锚贯入土体过程数值分析[J].水利与建筑工程学报,2015,(04):33-39.
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鱼雷锚贯入土体过程数值分析()
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《水利与建筑工程学报》[ISSN:1672-1144/CN:61-1404/TV]

卷:
期数:
2015年04期
页码:
33-39
栏目:
出版日期:
2015-08-30

文章信息/Info

作者:
张金利; 郝佳伟;
大连理工大学海岸和近海工程国家重点实验室;
关键词:
鱼雷锚长径比冲击速度贯入深度强度参数
摘要:
鱼雷锚主要应用于采用紧绷式锚泊系统的浮动式采油平台中。采用LS-DYNA软件针对质量为40 t的鱼雷锚以一定冲击速度贯入海床土体的过程进行了数值分析。主要考虑鱼雷锚长径比(L/D)、冲击速度、海床土体的c、φ等参数变化对鱼雷锚贯入过程影响。计算结果表明,鱼雷锚贯入海床土体的过程为快速过程,总历时极短(秒级),贯入过程可分为加速与减速两个阶段,其中减速阶段历时较长。贯入阻力随贯入深度增加而增大至峰值,当速度接近零时,贯入阻力出现陡降,最终贯入阻力(静阻力)与鱼雷锚重力平衡。随着冲击速度增加,贯入深度相应增大,且两者具有较好的线性关系。当冲击速度不变时,贯入深度随L/D增加而增大。海床土体强度参数c、φ的变化对鱼雷锚的贯入过程具有重要影响,随强度参数增加,贯入深度相应减小。更多还原

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更新日期/Last Update: 1900-01-01