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- Title
谐调螺栓连接对转子系统动力学特性的影响.
- Authors
姚星宇; 程涵
- Abstract
In order to study the influence of bolted joints on dynamic characteristics of aero-engine rotor system, the improved thinlayer element method was introduced to this system in normal condition, in which the characteristics of uneven stress distribution between joint surfaces was considered, and the material parameters of elements wasn’t updated by test data. Firstly, the basic principle of the improved thin-layer element method was briefly described. Secondly, this method was applied to the simplified rotor system, and the effect of bolt preload on the modal characteristics, critical speed and unbalance response was obtained. The results indicate that the rotor system is a periodic symmetric structure, and the critical speed of this system need to be solved in the rotating coordinate system when the improved thin-layer element method is applied to bolted joints of rotor system. The modal frequency, critical speed and unbalance response of rotor system increase with the increase of bolt preload, but the increase amount is almost negligible, which is completely different from the influence characteristics of bolt preload on stator system. Therefore, the bolted joints can be equivalent to a rigid connection when the rotor system is in normal.
- Publication
Science Technology & Engineering, 2022, Vol 22, Issue 10, p4229
- ISSN
1671-1815
- Publication type
Article