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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.
A theoretical analysis model of the response of the non-bonded flexible riser under axisymmetric load is given.First, the equilibrium equation of each layer of the flexible riser is derived based on the energy method and written in the form of matrix to obtain the stiffness matrix. Then, Matrix is assembled and the total stiffness matrix is obtained considering the boundary conditions, and all variables are solved iteratively. This method can judge the possible separation between the flexible riser layers and adjust the contact pressure between layers accordingly, so the axial The coupling between stiffness and torsional stiffness and the direction of load application.The theoretical analysis results are compared with the experimental tests and the two are in good agreement.The reasons for the deviation between the two are discussed.The results show that between the flexible riser layers The initial gap has a greater impact on this.