The result shows that the method can find the skeleton lines precisely and provide a new method for achieving the line of equal displacement in the plane displacement field.

结果表明：文中提出的干涉条纹的细化方法可以准确地找到骨架线，为获得面内位移场的等位移线图提供了一种新方法。

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Firstly, the dimensionless governing equations in terms of displacement of solid skeleton are derived; and the boundary conditions are homogenized.

导出了以固体骨架位移表示的无量纲控制方程，并将边界条件齐次化。

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