摘要
给出一种在轴对称载荷作用下非黏合柔性立管响应的理论分析模型.首先基于能量法推导出柔性立管各层的平衡方程并写成矩阵形式,得到其刚度矩阵;然后将各层刚度矩阵进行组装并考虑边界条件得到总刚度矩阵,进而通过迭代求解出所有变量.该方法可自行判断柔性立管各层之间可能发生的分离并相应调整层间的接触压力,因而可以考虑轴向刚度和扭转刚度之间的耦合以及载荷施加的方向.将理论分析结果与实验测试进行了对比,二者符合良好.讨论了二者之间存在偏差的原因,结果显示柔性立管各层之间的初始间隙对此影响较大.
An analytical model was given to determine the structur al behavior of unbonded flexible risers subjected to axisymmetric loads includin g axial force,torque and internal/external pressures.Equilibrium equations fo r flexible pipe components were firstly derived and put into a matrix form based on energy approaches.Then a comprehensive guide for assembling the stiffness m atrices was described.Equations for boundary conditions were incorporated into the stiffness matrix and with small iterations the global equilibrium of the ent ire pipe could be achieved quickly.The analytical procedure outlined could auto matically detect the tendency of layer separation and adjust the interlayer cont act pressures appropriately.Prediction of gap formations allowed the model to a ccount for coupling between the axial and torsional stiffnesses and the directio n of loads.The theoretical results were finally compared with the experimental data from the available literature and encouraging correlations were found.The discrepancy between the analytical prediction and the test data was also discuss ed.The existence of initial gaps between the component layers was considered as an important reason.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第5期122-126,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50921001)
关键词
非黏合柔性立管
轴对称分析
能量法
结构响应
初始间隙
接触压力
unbonded flexible risers
axisymmetric analysi s
energy approach
structural behavior
initial gap
interlayer pressure
