When the object is rotating or wiggling, the displacement of Moire fringe indicates the Angle of axis, and the stability of fringe indicates coincidence of the beam axis.
通过试件的旋转或摆动用条纹的移动来反映光束的倾斜，用条纹的稳定性来判断光轴的重合。
2
At present, researches are only limited to the static behavior and geometrically nonlinear stability of cylindrical orthogonal supported on the rigidity roof beam or fringe truss.