对于标准线性固体，由于弹性滞后效应，虽然位移分量也随时间而增长，但它将趋于某一极限值。
For standard linear solids, because of the effects of retarded elasticity, although the displacement components will also increase with time, they will tend to their limit values.
光弹性模型中的力学蠕变，伴随着光学效应随时间的变化。
The mechanical creep in photoelastic models is accompanied by a variation with time of the optical effects.
讨论了弹性波多普勒效应的叠加性质，并指出相对论的时间膨胀和长度收缩对弹性波多普勒效应的影响。
The superposition property of elastic wave's Doppler effect and the influence of relativistic time dilation and length contraction on elastic wave's Doppler effect are also discussed.
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