摘要
向量式有限元法是基于向量式力学和数值计算的一种创新性的结构行为分析方法。文章采用三种弹簧模型模拟海床,将向量式有限元法用于钢悬链线立管触地段与海床土体相互作用研究中,编制相应Matlab求解程序,计算了端部施加一定位移下立管的位形和弯曲应力,并与他人基于有限差分法及ABAQUS的模拟结果进行对比,同时运用该方法分析了弹簧模型、土体刚度、土体吸力系数等参数对立管触地段变形和弯曲应力的影响。结果表明向量式有限元法在模拟静态端部位移加载下的管-土相互作用是准确和可行的,能够直接求解变形和内力,具有相对简洁性,此方法是对立管力学行为的模拟,符合实际运动变形过程。为模拟管-土相互作用提供了新方法,同时为进一步研究实际循环载荷下管-土相互作用奠定了基础。
The vector form intrinsic finite element method(VFIFE)is an innovative method in the structural behavior analysis based on the vector mechanics and numerical calculations.Adopting three spring model to simulate the seabed,seabed interaction with steel catenary riser(SCR)touchdown zone was analyzed based on VFIFE.The corresponding solving program based on VFIFE was compiled with Matlab.Configuration and bending stress were analyzed,when the displacement is applied on the end.The result was compared with the result analyzed by ABAQUS and other’s solving program based on the finite difference method(FDM).Meanwhile parameters such as spring model,soils stiffness and soil suction force coefficient on the effect of the riser/seafloor interaction were analyzed.The result shows that it is accurate and feasible for the modeling scheme based on VFIFE to analyze the riser/seafloor interaction.It can give the internal force and deformation,which is relatively simple.This method simulates pipe mechanics behavior,and can more coincide with the actual deformation and motion.It presents a new method to simulate riser/seafloor interaction.And the research results provide a basis for further studying the riser/seafloor interaction under actual cyclic loading.
作者
王飞
李效民
马芳俊
郭海燕
WANG Fei;LI Xiao-min;MA Fang-jun;GUO Hai-yan(College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China;Shandong Key Laboratory of Civil Engineering Disaster Preventionand Mitigation,Shandong University of Science and Technology Qingdao,266590,China;College of Engineering,Ocean University of China,Qingdao 266100,China)
出处
《船舶力学》
EI
CSCD
北大核心
2019年第4期467-475,共9页
Journal of Ship Mechanics
基金
国家重点研发计划项目(2016YFC0802301)
山东省自然科学基金资助项目(ZR2017BEE041)
山东科技大学人才引进科研启动基金资助(2016RCJJ038)
关键词
向量式有限元法
钢悬链线立管
触地段
管土相互作用
弹簧模型
vector form intrinsic finite element method(VFIFE)
steel catenary riser(SCR)
touchdown zone
riser/seafloor interaction
spring model
