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原文提出了一个实用计算方法,其计算较为简单,也能反映出次时间效应的某些性质。笔者认为从这个途径来计算次时间效应,确具有很大实用价值。但认为还存在以下几个问题,值得商榷。(一)原文中将垂直变位分做两项,一项由平均法向应力σ_(ii)所产生,另一项由应力偏量 S_(ij)所产生。在公式推导中,式(6a)假定 K 是常数,式(8)假定 v 是常数,在式(10)中却假定了 G 是算符δ/δt 的函数,这三个假定是互不相容的。我们知道在弹性理论中,四个常数 K,G,v,E 是相互关联的,当知道其中两
The original proposes a practical calculation method, which is relatively simple to calculate and can also reflect some properties of the secondary time effect. The author believes that calculating the sub-time effect from this approach is indeed of great practical value. However, there are still the following issues that are worth discussing. (a) In the original text, the vertical displacement is divided into two items, one is derived from the average normal stress σ_(ii), and the other is derived from the stress bias quantity S_(ij). In formula derivation, Equation (6a) assumes that K is a constant, Equation (8) assumes that v is a constant, and in Equation (10) it is assumed that G is a function of the operator δ/δt. These three assumptions are mutually exclusive. Tolerable. We know that in the theory of elasticity, the four constants K, G, v, E are related to each other,