法向承力锚安装过程的动力研究  

Research on Dynamic Installation Model of Vertically Loaded Anchor

作　　者：冯倩[1] 孙克俐[2] 

机构地区：[1]国核电力规划设计研究院,北京100095 [2]天津大学港口海岸及近海工程系,天津300072

出　　处：《华北水利水电学院学报》2013年第3期102-105,共4页North China Institute of Water Conservancy and Hydroelectric Power

摘　　要：法向承力锚是一种适用于深海的新型系泊基础.为研究其安装过程中外界因素的影响,采用显式动力分析软件ANSYS/LS-DYNA建立了法向承力锚嵌入土体动力模型,对嵌入过程进行了仿真计算分析.结果表明:拖曳速度增大到0.8 m/s之后,嵌入海床面以下2.5 m时,所需拖曳力将趋于稳定;设计锚径角最大不能超过60°,推荐采用45°～55°的锚径角.仿真结果反映了法向承力锚的基本特性,整个安装过程的模拟实现对法向承力锚的结构优化起到了重要作用.Vertically loaded anchor （VLA） is a new type of mooring system for deep water offshore engineering. Based on the explicit dynamics finite element software ANSYS/LS - DYNA, dynamic installation model of VLA is established. The results show that when the towing speed is increased to 0.8 m/s and the anchor is embedded to 2.5 m below the sea-bed surface, the required towing force be- comes steady. The shank angle will be designed not to exceed a maximum of 60°, and 45°-55° is recommended. The results reflect the basic characteristics of VLA, and simulation implementation of the entire installation process plays an important role in structure op-timization of VLA.

关 键 词：法向承力锚 ALE 嵌入轨迹 极限嵌入深度 

分 类 号：TV223[水利工程—水工结构工程]