位移函数中应有四个未定常数。

These should be four undetermined constants in the displacement function.

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对于线粘弹性裂纹体，当外应力是常数时，各位移分量均是时间相依的，且是材料流变常数的函数。

For linear viscoelastic cracked bodies, when the applied stresses are constant, the displacement components are time dependent and are functions of rheological constants of materials.

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文中还讨论了弹性常数取用值误差对位移反分析计算成果的影响和地下厂房稳定性研究等问题。

This paper also discusses the influence on the results of back analysis due to the error of fetched value of elasticity constant and the stability study of underground powerhouse.

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So the meaning of the constant is where was the object at the initial time.

常数的含义是,物体的初位移

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So I realize that the constant, c, is the initial location of the object, and it's very common to denote that by x0.

所以我发现常数c,就是物体的初位移,我们习惯用x0表示

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