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Stiffness Calculation Model of Thread Connection Considering Friction Factors

机译：考虑摩擦系数的螺纹连接刚度计算模型

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摘要

In order to design a reasonable thread connection structure, it is necessary to understand the axial force distribution of threaded connections. For the application of bolted connection in mechanical design, it is necessary to estimate the stiffness of threaded connections. A calculation model for the distribution of axial force and stiffness considering the friction factor of the threaded connection is established in this paper. The method regards the thread as a tapered cantilever beam. Under the action of the thread axial force, in the consideration of friction, the two cantilever beams interact and the beam will be deformed, these deformations include bending deformation, shear deformation, inclination deformation of cantilever beam root, shear deformation of cantilever beam root, radial expansion deformation and radial shrinkage deformation, etc.; calculate each deformation of the thread, respectively, and sum them, that is, the total deformation of the thread. In this paper, on the one hand, the threaded connection stiffness was measured by experiments; on the other hand, the finite element models were established to calculate the thread stiffness; the calculation results of the method of this paper, the test results, and the finite element analysis (FEA) results were compared, respectively; the results were found to be in a reasonable range; therefore, the validity of the calculation of the method of this paper is verified.
机译：为了设计合理的螺纹连接结构，必须了解螺纹连接的轴向力分布。对于螺栓连接在机械设计中的应用，有必要估算螺纹连接的刚度。建立了考虑螺纹连接摩擦系数的轴向力和刚度分布的计算模型。该方法将螺纹视为锥形悬臂梁。在螺纹轴向力的作用下，考虑到摩擦力，两个悬臂梁相互作用而变形，这些变形包括弯曲变形，剪切变形，悬臂梁根的倾斜变形，悬臂梁根的剪切变形，径向膨胀变形和径向收缩变形等；分别计算螺纹的每个变形，并对它们求和，即螺纹的总变形。一方面，通过实验测量了螺纹连接的刚度；另一方面，建立了有限元模型来计算螺纹刚度。比较了本文方法的计算结果，测试结果和有限元分析（FEA）结果。发现结果在合理范围内；因此，验证了本文方法的有效性。

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