（1）非线性动力学、结构振动、转子动力学等理论基础研究

（2）流固耦合算法、稳定性分析、振动控制等数值模拟研究

（3）阻尼器设计、高速动平衡、状态监测与故障诊断等工程技术研究

航空航天与力学概论（助教）

航空发动机工程通论（助教）

（1）提出了基础运动激励条件下单转子、带中介轴承的双转子系统动力学特性的建模与分析方法，揭示了基础转动角速度、简谐幅值及频率等运动参数对单/双转子系统动力响应的影响，相关研究成果为快速计算复杂外部激励的系统动力响应提供了理论依据。

（2）在机动飞行与阻尼器减振方面，做出若干创新性工作，探究了转子—阻尼—支承系统的非线性振动特性，提出机动飞行环境下高速转子系统稳定性与运动分岔研究方法，揭示不稳定区域随运动频率的变化规律、不同运动状态之间的转化与关联，对高机动性的发动机转子系统动力学设计提供了理论支撑。

（3）发展了柔性转子现场动平衡理论，解决了转速波动时振幅和相位跳动问题，实现大涵道比涡扇发动机整机高速动平衡，为发动机减振起到关键作用。技术成果用于大飞机发动机工程研制，荣获2016年国防科技进步一等奖。

代表性论文：

1. Zhang, B., Chen, X.*, Xiang, F. G., Gan, X. H., Ren, G. M., “Dynamic characteristics of rotor-SFD-support system excited by base harmonic excitations using MHB-AFT method,” Proceedings of the ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, Rotterdam, The Netherlands, June 13-17, 2022: GT2022-82536.
2. Xiang, F. G., Chen, X.*, Zhang, B., Ren, G. M., Gan, X. H., “Simulation method of rotor dynamic characteristics considering temperature distribution and aerodynamic load,” Proceedings of the ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, Rotterdam, The Netherlands, June 13-17, 2022: GT2022-82417.
3. Chen, X., Ren, G. M., and Gan, X. H., 2022, “Dynamic behavior of a flexible rotor system with squeeze film damper considering oil-film inertia under base motions,” Nonlinear Dynamics, 106(4), p. 3117-3145.
4. Chen, X., Gan, X., and Ren, G., 2021, “Effects of journal static eccentricity on dynamic responses of a rotor system under base motions using FDM inertia model,” Journal of Sound and Vibration, p. 116591.
5. Chen, X., Gan, X. H., and Ren, G. M., 2021, “Effect of flight/structural parameters and operating conditions on dynamic behavior of a squeeze-film damped rotor system during diving–climbing maneuver,” Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering, ‏ 235(3), pp. 308-338.
6. Chen, X., Gan, X. H., and Ren, G. M., 2020, “Dynamic modeling and nonlinear analysis of a rotor system supported by squeeze film damper with variable static eccentricity under aircraft turning maneuver,” Journal of Sound and Vibration, 485, p. 115551.
7. Chen, X., Gan, X. H., and Ren, G. M., 2020, “Nonlinear responses and bifurcations of a rotor-bearing system supported by squeeze-film damper with retainer spring subjected to base excitations,” Nonlinear Dynamics, 102(4), pp. 2143-2177.
8. Chen, X., Gan, X. H., Jiang, S. Y., and Ren, G. M., “Dynamic characteristics of a squeeze film damped rotor system considering instantaneous static eccentricity in maneuvering flight,” Proceedings of the ASME Turbo Expo 2020: Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers (ASME), p. International Gas Turbine Institute.
9. Chen, X., and Liao, M. F., “Transient characteristics of a dual-rotor system with intershaft bearing subjected to mass unbalance and base motions during start-up,” Proceedings of the ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, p. V07AT33A007.
10. Chen, X., and Liao, M. F., “Steady-state characteristics of a dual-rotor system with intershaft bearing subjected to mass unbalance and base motions,” Proceedings of the ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition, American Society of Mechanical Engineers, p. V07AT33A006.
11. Chen, X., Liao, M. F., and Li, Q. K., 2017, “Effects of tightening torque on dynamic characteristics of low pressure rotors connected by a spline coupling,” Transactions of Nanjing University of Aeronautics and Astronautics, 34(5), pp. 514-523.
12. Chen, X., Liao, M. F., Zhang, X. M., and Wang, S. J., 2017, “Field balancing technology for low pressure rotors of high bypass ratio turbofan engines,” Journal of Aerospace Power, 32(4), pp. 808-819.
13. Chen, X., Liao, M. F., Wang, S. J., and Yi, Y., 2016, “Data acquisition and processing method for high-speed dynamic balancing of rotors,” Journal of Propulsion Technology, 37(3), pp. 554-562.
14. Chen, X., Liao, M. F., and Li, Q. K., 2015, “Dynamic characteristics of a rotor system with a spline coupling,” Journal of Propulsion Technology, 36(7), pp. 1069-1077.