以黏弹性流变模型理论为基础，建立软岩层、水泥环和套管流变耦合的力学模型。
Based on the theory of the viscoelastic rheological model, the coupled mechanical model of the soft rocks, the concrete sheath and the casing is developed.
作为其特例，本文还研究了环杆线与环结构的耦合阻抗。
The expressions of power and coupling impedance of the ring-loop structure are derived.
当微定位台的结构是多环、多自由度时，由于空间的限制，通常其运动方程是耦合的，需对它进行综合分析和解耦。
Due to space limit, the motion equations are often coupled when the micro positioning stage has multiple links and freedoms. Thus, synthesis and decouple are necessary.
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