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以一类采用斜直螺栓、不设传力衬垫的盾构管片接头作为分析案例,就interface单元模型与罚函数接触算法以及相关参数对应关系等进行了比较,研究表明:(1)管片接头interface单元模型是罚函数接触算法的一种特殊形式;(2)罚函数接触算法中的接触面法向刚度对应interface单元压缩刚度,而“穿透深度”对应Interface单元法向位移;(3)在线性转动阶段,管片接头的转动弹簧模型(弹性铰)、Interface模型、接触算法等3种模型的转动刚度是等效的;(4)采用罚函数接触算法时,接触面法向刚度的选择必须满足转动刚度等效的条件。
A kind of shield pipe joint with oblique bolts and no force transmission liner is taken as an example to analyze the contact element model, the contact function of penalty function and the correlation of relevant parameters. The results show that: (1) The interface element model is a special form of the penalty function contact algorithm. (2) The normal stiffness of the contact surface in the penalty function contact algorithm corresponds to the compression stiffness of the interface element, while the “penetration depth” corresponds to the normal displacement of the interface element ; (3) In the linear rotation phase, the rotational stiffness of the joint models of the spring model (elastic hinge), Interface model and contact algorithm are equivalent; (4) When using the penalty function contact algorithm, the contact surface The choice of normal stiffness must satisfy the equivalent of rotational stiffness.