摘要
桩腿耦合缓冲器在应用中主要起减小撞击力和限制上下结构相对位移的作用。在设计时,必须考虑到橡胶材料的大变形、橡胶-钢的接触和摩擦问题,它具有几何、材料和边界的三种非线性。通过结构非线性有限元软件ABAQUS/Explicit建立了桩腿耦合缓冲器的三维体单元模型,用基于中心差分法的准静态法,对其在水平和垂直两种工况下的准静力变形过程进行了数值仿真,从能量、接触、刚度与吸能以及应力应变等各方面对计算结果及其合理性进行了分析,并针对现有结构尺寸提出了改进建议。分析表明使用准静态分析方法是可行的,对桩腿耦合缓冲器的优化设计具有一定参考价值。
The Leg Mating Unit with rubber-metal pads as a buffer is applied in offshore superstructure installation to reduce mating force and accommodate large relative displacement.In design,much attention should be paid to the geometry,material and boundary nonlinearity involved in the LMU structure.In this paper,the 3-D FE model is created and its vertical and horizonrtal load cases are simulated with quasi-static method by ABAQUS/Explicit.The results are interpreted in terms of energy,contact,stiffness,stress and strain,which are reasonable enough to indicate that the LMU structure has strong strength and the simulating method employed here are feasible.Furthermore,some suggestions are given to improve the present structure.The results in the paper are helpful to the design optimization of the leg mating unit.
出处
《海洋工程》
CSCD
北大核心
2011年第2期10-17,共8页
The Ocean Engineering
