位移变量 meaning in English

offset variable

For this problem , compatible displacement method of different mesh is presented in the paper . on the interface of different mesh , nodes belonging to structure or foundation are regarded as basic nodes , and nodes belonging to the other side are regarded as subordinate nodes . the linear interpolation relation between basic nodes and subordinate nodes is founded on the interface
该方法以交界面上结构或地基相连一侧节点的位移变量作为基本变量，而另一侧节点的位移变量作为从变量，通过线性插值建立从变量与基本变量之间的线性关系，导出以基本变量作为未知量的总体线性方程组，从而在两者交界面处建立位移协调关系。