作　　者： ; ; ; ; (李旭）;

机构地区： 天津大学建筑工程学院天津市港口与海洋工程重点实验室

出　　处： 《天津大学学报》 2011年第4期313-318,共6页

摘　　要： 研究了流作用下的初始位置、缆长和预张力对于深海系泊缆动张力的影响.考虑深水系缆的拉伸和弯曲变形,以及缆变形的几何非线性和水动力影响,取正交坐标和切向量描述任意结点的6个广义位移,基于细长杆理论推导缆索的单元刚度矩阵,引入单元内张力一致假设,得到12×12的非线性刚度矩阵,实现了本文单元与有限元软件的调用对接.同时计算了不同初始位置、缆长和预张力条件下系泊系统的动张力,给出了不同因素对于动张力的影响规律. In this paper,the effects of initial displacement,length of the cable and pretension on cable tension in deep sea were studied.By considering the extension and bending deformation of cable in the deep sea,6 generalized displacements of the nodes were described by rectangular coordinate and their tangent vector.The hypothesis that ten-sion in the element won’t change was adopted.The 12 ×12 nonlinear stiffness matrix was obtained based on the rod theory considering the geometric nonlinearity and the effect of water dynamic and the element can be called by general finite element software.Dynamic tension of mooring system with different initial displacements,lengths of the cable and pretension was calculated,and the effects of different conditions on dynamic tension were given.

关 键 词： 系泊系统 细长杆理论 有限元法 预张力 动张力

领　　域： [天文地球]