本文从理论上阐明了冻结管应力与冻结管刚度之间的数学关系,确立了降低冻结管刚度或局部接头的刚度、能大大降低易断管接头附近冻结管上应力的理论。介绍了研制的柔性接头刚度曲线,分析了拉应力、弯应力的释放量,柔性接头的主要参数、实物照片。 In this paper, the mathematical relationship between the stress of frozen tubes and the stiffness of frozen tubes is clarified theoretically, and the theory of reducing the stiffness of frozen tubes or local joints and the stress on the frozen tubes near the broken joints is established. The stiffness curve of the flexible joint was introduced. The tensile stress, the release of the bending stress, the main parameters of the flexible joint and the physical photograph were analyzed.