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研究了夹克泡沫保温管道在保持钢管、泡沫层和夹克管同步变形时，钢管与泡沫、泡沫与夹克间接触面的剪切力，横截面上各部分轴力、应力以及轴向变形。结果表明，各接触面剪切力略大于管道所处环境与夹克间的摩擦阻力，在实际生产中应保证管道中各种材料间的接触面具有一定的抗剪切强度，工程中应尽量减小环境对管道的约束。且在进行强度和变形计算时，可忽略泡沫和夹克的影响。
The shear stress of the pipe and foam, the interface between the foam and the jacket, the axial force, the stress and the axial deformation of each part in the cross-section were studied when the jacket foam pipe was kept in synchrony deformation of the steel pipe, foam layer and jacket pipe. The results show that the shear force at each contact surface is slightly greater than the frictional resistance between the environment in which the pipeline is located and the jacket. In actual production, the contact surface between various materials in the pipeline should have certain shear strength and should be minimized in the project Small environment on the pipeline constraints. And in the calculation of strength and deformation, can be ignored foam and jacket effects.