Abstract: In order to study stiffness characteristics of folded squirrel cage elastic support (SCES)，the radial and angular stiffness and its key influence factors were analyzed by adopting numerical simulation and experimental methods. The results showed that the clearance between SCES and loading ring had significant effect on SCES stiffness，compared with interference fit，when the clearance increased to 1 mm，the stiffness was reduced by 37.3%. The smaller loading ring thickness was，the smaller elastic support stiffness was. Displacement gauging point had great impact on stiffness，good stability was showed at the retrace point，where the variation range was 2% in different loading positions，while variation range of stiffness in the tail of folded sleeve reached to 27.3%. The loading position had also great effect on angular stiffness，and the variation range reached to 85.2%.

Key words: Folded squirrel cage elastic support；Stiffness characteristics；Angular stiffness；Test；Numerical simulation

摘要： 为了研究折返式鼠笼弹性支承的刚度特性，采用数值仿真与试验研究相结合的方法，对鼠笼弹支径向刚度和角刚度的特性及其关键影响参数进行了分析。结果表明，鼠笼弹支与加力环之间的间隙对弹支刚度影响明显，与过盈配合相比，当间隙增加到1mm时刚度降低了37.3%；加力环厚度越小，弹支刚度越小；位移测点位置对刚度结果影响较大，折返处刚度稳定性好，不同力施加位置下，其变化幅度仅为2%，而折返套尾部刚度的变化幅度达到了27.3%；角刚度受力施加位置影响巨大，变化幅度达到了85.2%。

关键词: 折返式鼠笼弹支；刚度特性；角刚度；试验；数值模拟