轉子系統因其在航空發動機和燃氣輪機中的重要地位被密切關注，近年頻發的多起空難意外與發動機失效有關，尤以轉子系統中的裂紋影響最為顯著，因此各大國積極推進其動態特性及故障診斷的創新性研究。申請人前期研究給出了軸-圓盤-葉片單轉子系統的耦合振動特性規律，描述了裂紋葉片破壞系統週期性耦合的現象。鑒於此，本書擬以發動機轉子系統為研究對象，提出發動機轉子全系統耦合振動特性關係的概念；對轉子系統中熱彈耦合非線性振動特性的問題，開展多因素耦合振動特性及多參數綜合作用的轉子系統理論模型與實驗研究，揭示發動機轉子系統結構及熱彈耦合非線性振動特性的影響機理及規律；最後依此規律，給出改進措施。本專案為發動機轉子系統結構及熱彈耦合振動特性及其裂紋診斷提供理論基礎和科學依據，並初步建立一套系統存在裂紋缺陷的診斷技術，為航空發動機和燃氣輪機設計、研發與改善提供參考。
 
Summary

Due to its important position in aero-engines and gas turbines, the rotor system has been paid close attention to. In recent years, a number of frequent air accidents are related to engine failure, especially the cracks in the rotor system have the most significant impact. Therefore, many countries are actively promoting innovative research on its dynamic characteristics, reliability and fault diagnosis. The previous study of the applicant provided the coupled vibration characteristics of the shaft -disc-blade single rotor system and described the periodic coupling phenomenon of the cracked blade failure system. In view of these, this book intends to take the engine rotor system as the research object and put forward the concept of the coupling vibration characteristic relationship of the engine rotor system. The theoretical model and experimental study of multi-factor coupled vibration characteristics and multi-parameter combined action of the engine rotor system are carried out to reveal the influence mechanism and rule of the thermo-elastic nonlinear vibration characteristics of the engine rotor system structure. Finally, according to this rule, the improvement measures are given and the influence of the improvement on system reliability is analyzed. This project provides the theoretical basis and scientific basis for the thermo-elastic coupled vibration characteristics of the engine rotor system and its crack diagnosis, and initially establishes a set of diagnostic technology for the system's crack defects, which provides a reference for the system design, research & development and improvement of the aero-engines and gas turbines.