Abstract: A theoretical calculation method is proposed for calculating the radial force on the joint surface of interference fit for balance blocks with non-uniform thickness, based on the thick-walled cylinder theory. The effectiveness of this theoretical calculation method is demonstrated by comparison with finite element simulation results. Subsequently, the theoretical calculation method and simulation are used to explore the influence of key design parameters such as amount of interference, coupling length, coupling diameter, and thickness of the containment component on the radial force of the joint surface of the balance block, which is a containment component with non-uniform thickness. The results show that the radial force is positively correlated with the interference amount and the length of the bond, the negative correlation is nonlinear with the diameter of the bond, and the thickness of the inclusion is positively correlated. On the basis of this theoretical calculation method, a calculation tool is developed to greatly improve the computational efficiency.

Key words: Balance block, Interference fit, Radial force, Finite element