Determination of Contact Stiffness and Damping of a Tie-Bolt Rotor with Interference Fits Using Model Updating with Thin-Layer Elements
Determination of Contact Stiffness and Damping of a Tie-Bolt Rotor with Interference Fits Using Model Updating with Thin-Layer Elements
复制标题
使用薄层单元模型更新确定过盈配合拉杆螺栓转子的接触刚度和阻尼
DOI：
10.1155/2020/8872401
复制
发表时间：
2020-11-19
影响因子：
1.6
通讯作者：
Yuan, Qi
中科院分区：
文献类型：
--
作者：
Li, Pu;Yuan, Qi
航空发动机和燃气轮机中普遍使用螺栓联接转子，过盈配合确保了轮盘装配的准确定位。本文对具有过盈配合的系杆转子在不同预紧力下的刚度和阻尼特性进行了实验和数值研究。采用包含薄层单元的有限元模型进行模型修正，以预测接触刚度和阻尼特性。提出了一种基于响应面优化的系杆转子两步模型修正方法。最后，对干涉配合和灵敏度分析进行了准静态有限元仿真，验证了实验结果。压配合会产生双线性接触刚度。此外，与预载荷相比，模态阻尼表现出更敏感和非单调的行为。
Tie-bolt rotors are commonly applied in aeroengines and gas turbines, and interference fits ensure accurate positioning for disk assembling. This paper presents experimental and numerical studies on the stiffness and damping properties of a tie-bolt rotor with interference fits under different preloads. An FE model incorporating thin-layer elements is used to carry out model updating to predict the contact stiffness and damping characteristics. A two-step model updating approach of the tie-bolt rotor using the response surface optimization is implemented. Finally, a quasistatic FE simulation concerning the interference fits and sensitivity analysis is performed to validate the experimental results. Press fit induces a bilinear contact stiffness. Also, modal damping demonstrates a more sensitive and nonmonotonic behavior versus preload.