Research on design method of high-stability spoke-type elastic ring and its static/dynamic stiffness characteristics

YANG Tingzhao; WANG Yongfeng; DENG Wangqun; YANG Hai; LIU Wenkui; HONG Jie

doi:10.16579/j.issn.1001.9669.2026.06.002

Abstract：[Objective]Aiming at the problems of stiffness nonlinearity and large circumferential stiffness fluctuation of the traditional boss-type elastic ring support structure for aero-engines under large loads,the design method and static/dynamic stiffness characteristics of a novel spoke-type elastic ring with high mechanical stability were studied,to solve the engineering pain point of insufficient support stability of the traditional structure.[Methods]Firstly,a structural scheme and mechanical model of the novel spoke-type elastic ring were proposed,the key design parameters were identified,and a standardized design process was established to support the structural scheme design.Secondly,a static/dynamic stiffness simulation method for the elastic ring based on Ansys software was established,the influence law of key structural parameters on stiffness characteristics was mastered,and the optimal selection of parameters was realized.Finally,a static stiffness test system was built,and multi-condition stiffness characteristic tests were carried out to verify the structural performance and the accuracy of the simulation method.[Results]The results show that the circumferential stiffness fluctuation of the novel spoke-type elastic ring is no more than 1.7％,and its circumferential uniformity is much better than that of the traditional structure;under the dynamic load excitation of 0-500 Hz,the variation of dynamic stiffness can be controlled within 1.5％without sudden stiffness change;no stiffness nonlinearity occurs under large load conditions,and the relative error between the stiffness simulation and test results is less than 5％,which can provide a reference for the design of aero-engine rotor support systems.