非对称方法对回旋振动稳定性的影响

振动问题作为长期制约航空机轮领域发展的主要因素之一，严重影响着飞行起降安全，提出一种非对称的设计方法来解决飞机刹车过程中产生的回旋振动问题。该方法利用非对称的概念，将两个频率相同的摩擦耦合对称模态分离，从而改善飞机刹车振动稳定性。首先构建飞机刹车振动的动力学方程，其次通过对静盘进行打孔，考虑等体积和等大小的非对称孔对回旋振动的影响，使用复模态分析和瞬态动力学的方法对机轮刹车回旋振动问题进行了分析。最后用仿真模拟结果验证了该方法对减小飞机刹车振动的有效性，对实际工程设计具有一定的指导意义。

The influence of asymmetric method on stability of whirl vibration

Vibration problem is one of the main factors restricting the development of aircraft wheel field for a long time, and seriously affects the safety of flight take off and landing. An asymmetric design method is proposed to solve the whirl vibration generated in the process of aircraft braking. This method uses the concept of asymmetry to separate two frictional coupling symmetric modes with the same frequency, so as to improve the vibration stability of aircraft brake. The dynamic equation of aircraft brake vibration is firstly constructed, and then the whirl vibration of wheel brake is analyzed by the method of complex mode analysis and transient dynamics, considering the effect of asymmetric holes of equal volume and equal size on whirl vibration. Finally, the simulation results are analyzed and discussed, and the effectiveness of the proposed method in reducing aircraft brake vibration is verified, which has certain guiding significance for practical engineering design.