基于ANSYS的弹性支承的悬臂转盘-轴承系统模态分析

针对悬臂转盘系统在高速旋转时的振动、不稳定等现象，建立弹性支承悬臂转盘一轴承系统动力学模型并计算理 论临界转速，应用ANSYS有限元软件对带有预应力的转盘一轴承系统进行了模态分析，分析转盘系统额定转速、轴承支 承刚度、轴承间跨度和转盘厚度对转盘一轴承系统固有频率的影响，得到了各阶固有频率和固有振型。结果显示：额定转 速和轴承支承刚度是影响转盘一轴承系统模态参数的主要因素，在相同工况条件下，同阶固有频率与额定转速成一元三 次方程变化。同时转盘系统固有频率都随着额定转速和轴承支承刚度的增大而增大。

Modal Analysis of Elastically Supported Cantilever Wheel - Bearing System Based on ANSYS

There are some phenomena about vibration and instability for cantilever carousel system rotating at high speed. The dynamics model of resilient support arm wheel - bearing system was built and the theoretical critical speed was calculated. The modal analysis for wheel-bearing system with pre-stress was made based on the finite element software of ANSYS. It analyzed some effects of turntable system rated speed, bearing stiffness. bearing span, dial thickness to the turntable system natural frequency, and natural frequencies and mode shapes were obtained. The results show: rated speed and bearing stiffness are major factors affecting the turntable system modal parameters. Under the same working conditions. the natural frequency and the rated speed vary to cubic equation. In the meanwhile. the natural frequencies increase as the rated speed and bearing stiffness increas.