摘要
以双电机驱动自同步振动磨为研究对象,对其进行简化处理,建立力学模型。通过对其施加X,Y方向的简谐激振力,建立无阻尼系统强迫振动和有阻尼系统强迫振动的数学模型,在此基础上,确定Rayleigh阻尼的常数α和β,利用有限元ANSYS软件进行瞬态动力学分析,研究其在动载荷作用下的变形情况。研究结果表明:在工况频率16 Hz下,节点运动轨迹更接近圆形,距理想粉碎效果的圆形轨迹较近,粉碎效果较好,进入稳定期的时间较快;在共振频率42 Hz下,节点轨迹振幅更大,进入稳定期较慢,阻尼对振动的衰减作用较强;不同阻尼比对振动的衰减作用成正比关系。因此,可以通过控制阻尼比等参数获得更有利的研磨效果,提高研磨效率。
The self-synchronous vibration mill of dual motors was simplified to establish mechanics model. To study the deformation under the action of dynamic load in the X,Y direction where the harmonic exciting forces were applied on,undamped system forced vibration and damping system forced vibration mathematical model were established. On this basis,with the determination of Rayleigh damping constant α and β,the finite element ANSYS software could simulate transient dynamics analysis. The research results indicated that node＇s trajectory was close to the circular,faster be in stable phase and get better grinding effect under working condition of 16 Hz frequency; the amplitude of node＇s trajectory could be larger,and was slower to get into stable phase and vibration attenuation effect of damping was much stronger under resonant frequency of 42 Hz. Different damping ratio had proportional effect on the vibration attenuation.Therefore,the effect and efficiency of grinding can be improved by controlling the parameters of damping ratio.
出处
《轻工机械》
CAS
2016年第4期38-43,共6页
Light Industry Machinery
基金
国家自然科学基金资助项目(51402192)
上海理工大学创新基金项目(10-15-301-201)
关键词
振动磨
力学模型
动力分析
Rayleigh阻尼
有限元分析
self-synchronous vibration mill
mechanical model
dynamic analysis
Rayleigh damping
Finite Element Analysis（FEA）
