Zhou Guangwu, Li Peng, Liao Daxin, Zhang Yuhao, Zhong Ping
School of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China.
Industrial Turbine Division, Dongfang Turbine Co., Ltd., Deyang 618000, China.
Materials (Basel). 2020 Dec 20;13(24):5818. doi: 10.3390/ma13245818.
The vibration noise generated by water-lubricated rubber bearings (WLRBs) seriously reduces the concealment of a ship's navigation. The purpose of this study was to obtain the relationships between friction-induced vibration and the friction coefficient, specific pressure, temperature, and stiffness of the bearing support during the shutdown process of WLRBs. Using transient dynamic analysis (Abaqus/Standard), the shutdown process of the bearing system was simulated by setting a friction coefficient curve, and with the fast Fourier transform (FFT), the data in the time domain were then converted to the frequency domain. In addition, an orthogonal table was applied to select the best level for each factor. The results show that proportionally increasing the friction coefficient and specific pressure caused higher vibrations, and the effect of the specific pressure on vibration is more prominent than that of the friction coefficient. Higher temperatures led to an increase in the peak frequency of noise (squeal) and the virtual value of acceleration. Increasing the stiffness of the bearing support decreased the higher-frequency squeal but dramatically increased the lower-frequency chatter. The results of the study are of guiding significance for the improvement of research methods and the optimization of the materials and structures of WLRBs.
水润滑橡胶轴承（WLRBs）产生的振动噪声严重降低了船舶航行的隐蔽性。本研究的目的是获取水润滑橡胶轴承在停机过程中摩擦诱导振动与摩擦系数、比压、温度及轴承支撑刚度之间的关系。采用瞬态动力学分析（Abaqus/Standard），通过设置摩擦系数曲线模拟轴承系统的停机过程，然后利用快速傅里叶变换（FFT）将时域数据转换到频域。此外，应用正交表为每个因素选择最佳水平。结果表明，摩擦系数和比压成比例增加会导致更高的振动，且比压对振动的影响比摩擦系数更为显著。温度升高会导致噪声（尖叫）的峰值频率和加速度有效值增加。增加轴承支撑的刚度会降低高频尖叫，但会显著增加低频颤振。该研究结果对改进研究方法以及优化水润滑橡胶轴承的材料和结构具有指导意义。
