A Method for Vibration Optimization of Damped Blade Parameters by Golden Section

4th Annual International Workshop on Materials Science and Engineering

Zhao, Wei^1 ; Liu, Zhufeng^2 ; Zhang, Di^1 ; Xie, Yonghui^2

MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'An Jiaotong University, Xi'an, China^1

Shaanxi Provincial Engineering Laboratory of Turbomachinery and Power Equipment, Xi'An Jiaotong University, Xi'an, China^2

关键词: Dynamic characteristics;    Friction modeling;    Golden section;    Normal loads;    Optimum value;    Response amplitudes;    Turbine blade;    Vibration optimization;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/381/1/012052/pdf
DOI  :  10.1088/1757-899X/381/1/012052

来源: IOP

【 摘 要 】

A vibration optimization method of damped blade based on golden section is proposed in this paper. The optimal normal loads and damper positions can be determined fast and reliably. Specifically, this method is applied to optimize vibration security of an actual turbine blade stage. By using Mindlin friction model, a numerical analysis of dynamic characteristics is performed. The gap of shrouds is taken as the optimal object and the value is determined finally. The results indicate that, the optimum value is obtained as 1.60mm.The frequency avoidance ratio of the damped blade is sufficient for security. Meanwhile, the response amplitudes are decreased significantly.