摘要
螺栓连接被广泛应用于航空发动机转子的连接结构中,螺栓预紧力对转子动力学特性的影响是螺栓预紧力设计需考虑的要素之一。为获取螺栓预紧力对转子动力学特性的影响规律,建立了螺栓连接结构有限元模型,通过Ansys Workbench软件对螺栓连接结构进行仿真计算,对安装边螺栓连接结构施加不同百分比的螺栓预紧力,计算螺栓连接安装边拉伸刚度的变化情况;利用层单元法建立能够模拟不同螺栓连接刚度的转子模型,分析了螺栓预紧力对临界转速的影响;搭建了转子动力学实验装置,对转子临界转速仿结果进行验证。结果表明:在其他工况条件相同的情况下,当螺栓预紧力增大时,安装边螺栓连接结构的拉伸刚度呈线性增大,进而引起转子临界转速增大。
Bolt connection is widely used in the connection structure of aero-engine rotors.The bolt preload has a certain effect on the rotor dynamics characteristics.A finite element model of bolt connection structure is established.The simulation of the bolt connection structure is conducted by Ansys Workbench.The different sets of preloads are applied to the bolt connection structure,and the variation of the tensile stiffness are calculated.The layer element method is used to establish a rotor model which could simulate different bolt stiffness,and the influence of preload on the critical speed was analyzed.A rotor dynamics experimental device is built to verify the simulation results of the rotor critical speed.The results show that under the same conditions,when the bolt preload increases,the tensile stiffness of the structure increases linearly,and the critical speed of the rotor increases.
作者
付鹏哲
刘仕运
刘玉
Fu Peng-zhe;Liu Shi-yun;Liu Yu(AECC Shenyang Engine Research Institute,Shenyang 110015,China;Shenyang Aerospace University,Shenyang 110136,China)
出处
《内燃机与配件》
2023年第5期5-8,共4页
Internal Combustion Engine & Parts
基金
基础性军工科研院所稳定支持项目:面向性能保持的结构变化预测及控制技术研究。
关键词
螺栓连接
螺栓预紧力
拉伸刚度
临界转速
层单元
Bolted flanged connection
Bolt preload
Tensile stiffness
Critical speed
Layer element
