安装缆绳对板锚旋转特性影响的大变形有限元分析  

Large Deformation Finite Element Analysis on Influence of Installation Line on Keying Characteristics of Plate Anchors

作　　者：闫玮 赵燕兵 赵云轩 李雪 YAN Wei;ZHAO Yanbing;ZHAO Yunxuan;LI Xue(College of Water Resources Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学水利科学与工程学院,太原030024

出　　处：《船舶工程》2024年第7期166-174,共9页Ship Engineering

基　　金：国家自然科学基金项目(51741909);山西省应用基础研究计划项目(202303021211067,202103021223113)。

摘　　要：为了分析安装缆绳对吸力嵌入式板锚旋转特性的影响,基于大变形有限元分析技术耦合的欧拉-拉格朗日法,通过用户子程序VUAMP引入缆绳方程,建立板锚-缆绳-海床土三者耦合作用的有限元模型。分析模型土体网格尺寸、摩擦系数和缆绳子程序参数等,确定参数取值,并进行对比验证模型的可行性。在考虑安装缆绳的影响下,分析安装角、偏心比、土体强度和缆绳方程参数等对板锚旋转特性的影响。结果表明:安装角越大,板锚埋深损失越大,板锚的最终方位角越小,且最终方位角与安装角互余;随着偏心比的增大,板锚的埋深损失在减小;偏心比一定时,板锚的埋深损失随着安装角的增大而线性增大;随着土体强度的增大,板锚的埋深损失逐渐增大;当安装角为15°~45°时,板锚埋深损失随着缆绳方程参数增大而增大;安装角大于45°,板锚埋深损失不受缆绳方程参数的影响;安装角不变的情况下,锚板最终方位角随着缆绳方程参数的增大而逐渐减小。研究成果可为海洋系泊系统的发展提供参考。In order to analyze the influence of installation line on the keying characteristics of suction embedded plate anchors,based on the coupled Eulerian-Lagrangian method,a large deformation finite element analysis technology,the chain equation is introduced through the user subroutine VUAMP to establish a plate anchor-chain-seabed interactional finite element model.The mesh size of soil model,frictional coefficient and parameters of chain equation are examined to determine the values of the parameters and compared to verify the efficiency of the model.The effects of installation angle,eccentricity ratio,soil strength and parameters of chain equation on the keying characteristics of the plate anchor are investigated taking into account the effect of the installation line.The results show that the larger the installation angle,the larger the embedment loss of the plate anchor,the smaller the final inclination angle of the plate anchor,and the final inclination angle is reciprocal with the installation angle;the embedment loss of the plate anchor decreases as the eccentricity ratio increases.For the same eccentricity ratio,the embedment loss of the plate anchor increases linearly with the increase of the installation angle;as the strength of the soil increases,the embedment loss of the plate anchor increases;when the installation angle is 15°-45°,the plate-anchor embedment loss increases with increasing parameters of chain equation;when the installation angle is greater than 45°,the embedment loss of plate anchor is not affected by parameters of chain equation.For the same installation angle,the final inclination angle of the anchor plate decreases gradually with the increase of parameters of chain equation.The research results can provide certain references for the development of offshore mooring systems.

关 键 词：板锚 安装缆绳 旋转特性 大变形有限元分析 

分 类 号：TU476[建筑科学—结构工程] P75[建筑科学—土工工程]