Analysis of the resistance of elliptical tip of torpedo anchor by 
plastic limit analysis

YU Lu; YANG Qing; YANG Gang; ZHANG Jin-li

doi:10.16285/j.rsm.2019.1182

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Analysis of the resistance of elliptical tip of torpedo anchor by plastic limit analysis

更新时间：2026-06-25

- Analysis of the resistance of elliptical tip of torpedo anchor by plastic limit analysis
- Vol. 41, Issue 6, Pages: 1953-1962(2020)
- 作者机构：
  
  大连理工大学海岸与近海工程国家重点实验室,辽宁,大连,116023
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2019.1182
  CLC： P75
- Online First：02 August 2020，
  
  Published：2020
- 稿件说明：
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YU Lu, YANG Qing, YANG Gang, et al. Analysis of the resistance of elliptical tip of torpedo anchor by plastic limit analysis[J]. 2020, 41(6): 1953-1962.
DOI：

YU Lu, YANG Qing, YANG Gang, et al. Analysis of the resistance of elliptical tip of torpedo anchor by plastic limit analysis[J]. 2020, 41(6): 1953-1962. DOI： 10.16285/j.rsm.2019.1182.

摘要

鱼雷锚安装过程中，锚尖形状影响尖部贯入阻力进而影响贯入深度。基于塑性极限分析理论下限法分析不同锚尖长径比??的椭圆形锚尖的贯入阻力和贯入阻力系数，并考虑了贯入深度、锚?土界面摩擦对贯入阻力以及贯入阻力系数的影响。结果表明：（1）锚?土界面光滑时，锚尖贯入阻力系数随着锚尖长径比的增大而减小；锚?土界面粗糙时，锚尖贯入阻力系数随着锚尖长径比的增大而增大。（2）摩擦力对贯入阻力系数的影响随着??增大而增大。（3）随着埋置深度增加，贯入阻力系数受? 影响最小时所对应的摩擦系数逐渐减小。（4）当锚?土界面摩擦系数? > 0.75时，工程中可选用?<1的锚尖用以减小端部贯入阻力；当??< 0.26时，??>1的锚尖提供更小的端部贯入阻力。锚尖长径比??= 0和??= 1的下限解与前人研究的桩基和圆形结构的理论解较为一致，进一步验证了所提出的椭圆形锚尖下限法模型的可行性。

Abstract

During installing procedures of torpedo anchors

tip-shape of the torpedo anchor affects penetration resistance and depth. In this study

the lower bound method of the plastic limit analysis theory is used to analyze the penetration resistance and penetration resistance coefficient for different aspect ratios of the elliptical-tip of torpedo anchor (ξ)

embedment depth

and friction coefficient of anchor-soil. A series of results is obtained: 1) If a soil-anchor interface is smooth

the penetration resistance coefficient decreases with increasing the aspect ratio of torpedo anchor tip; for the rough interface of soil-anchor

the penetration resistance coefficient increases with increasing the aspect ratio. 2) The influence of the friction force markedly increases with increasing ξ due to a larger interfacial area. 3) With increasing embedment depth

the friction coefficient reduces gradually

which corresponding penetration resistance coefficient is minimally impacted by various ξ. 4) If the friction coefficient ? is larger than 0.75

the anchor tip with the aspect ratio less than 1 responds to smaller bearing capacity; and while the friction coefficient is less than 0.26

the smaller bearing capacity is provided by the anchor tip following aspect ratios greater than 1. The lower bound results of ξ = 0 and 1 show good consistent with the previous solutions for strip foundation and circular structure

which verify the lower bound method of elliptical-tip of the torpedo anchor is reasonable.

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