Session: 

Paper Number: 154317

Integrated Design Method of Structure and Dynamic Response of High Speed Cantilever Rotor System 

With the performance development of modern turboshaft engines, their reduced mass and increasingly complex loads pose greater challenges to the control of the rotor system’s dynamic response. Based on the design approach of adjusting the dynamic characteristics of high-power turbine rotor systems using cantilever support structures, an integrated design method is proposed. This method involves establishing a parametric model of the rotor system and performing simulation analysis, leading to the creation of a surrogate model of the rotor. It enables the description of the relationships between the structural characteristic parameters of the return-style journal, support stiffness, and the rotor's dynamic characteristics. A multi-objective optimization algorithm is also developed to achieve an integrated design of rotor geometry, support constraints, and dynamic response. The results indicate that, compared to the power turbine rotor of a certain engine, under typical rotor dynamic characteristic design requirements, the optimized rotor not only has a lighter weight and better static strength performance under operating conditions, but also exhibits a larger critical speed margin and lower dynamic response at high speeds. This maximizes the regulatory function of the cantilever support structure, providing an effective new method for the design and manufacturing of advanced turboshaft engines with considerable engineering application value.

Presenting Author: Zhefu Yang Research Institute of Aero-engine

Presenting Author Biography: Dr. yang currently works at the Research Institute of Aero-Eninge, Beihang University (BUAA). Research interests are in structural dynamics, especially rotor dynamics, whole engine vibration of aero-engines.

Authors:

Jie Hong Research Institute of Aero-Eninge, Beihang University
Junxing Pu School of energy and power engineering, Beihang University
Zhefu Yang Research Institute of Aero-engine