火箭推进2025，Vol.51Issue(5)：111-120,10.DOI:10.3969/j.issn.1672-9374.2025.05.012
螺栓连接对盘轴系统振动特性的影响
Analysis on vibration characteristics of turbine-shaft system influenced by bolt connection
摘要
Abstract
Mastering the vibration characteristics of turbine is an important part of turbine design.The contact status at the interface between the turbine and the shaft has a significant impact on its vibration characteristics.In order to consider the contact status in the vibration characteristic solution process,based on the penalty function method,the contact status was set as the additional constraint condition of the finite element model of disc shaft system,and the vibration characteristics were solved by finite element method and verified by modal tests.Modal test was conducted to verify the method;the effects of bolt preload,friction coefficient,etc.on the first 3 orders natural frequencies of the turbine-shaft system were analyzed,and the influence mechanisms were revealed by comparing the contact status.The results show that the first three natural frequencies of the turbine-shaft system obtained by using the method are within 4.74%of the experimental results,verifying the accuracy of the vibration characteristic solution method.Increasing the bolt preload within 0-50 kN will increase the contact area and change some nodes from sliding contact to sticking contact,the equivalent constraint is stronger,and the frequency of the first 3 orders of the turbine-shaft system is higher.Increasing the friction coefficient when the bolt preload is within 2-50 kN and same will change some nodes from sliding contact to sticking contact and increase the friction of the sliding contact,the tangential equivalent constraint is stronger,and the frequency of the first 3 orders of the turbine-shaft system is higher.关键词
振动特性/涡轮盘/螺栓预紧力/摩擦因数/有限元方法Key words
vibration characteristics/turbine disk/bolt preload/friction coefficient/finite element method引用本文复制引用
田旭,孙羽键,徐自力,杜大华,王珺..螺栓连接对盘轴系统振动特性的影响[J].火箭推进,2025,51(5):111-120,10.基金项目
国家重点实验室基金(6142704190404) （6142704190404）
