摘要
为了改变传统的偏心激振装置激振频率单一的缺陷,设计了一种可以产生宽频激振的偏心轮机构,以达到提高振动夯实机构工作功效和扩大工作对象范围的目的.运用质点动力学基本方程,建立了在机构运行过程中不同时段下上述宽频激振器的分段动力学模型,同时基于弹性力的分段非线性,推导出机构支座约束反力与运动位置及滑块加速度的非线性关系式.通过一仿真算例,验证了机构设计初衷的可行性和新型激振器的优越性.结果表明:所设计的偏心轮激振装置在保留了传统激振器主频的基础上,增加了一些能量较大的倍频成分和分布较宽的分数频成分,且总的激振能量也较大.
One new type of vibrating centrifuge with a wider frequency range was designed to overcome the defaults with a single frequency of traditional vibrating centrifuge. A discontinuous dynamical model at different running position was established based on particle dynamical basic differential-equation. At the same time, based on the discontinuous nonlinear of the elastic force, a nonlinear equation between the restricted contrary force and acceleration of the slide-block at different running position was presented. The feasibility of initial design and the superior of new vibrating centrifuge have been validated via a simulation example. The results show that the improved vibrating centrifuge not only holds principal frequency existed in the traditional vibrating centrifuge but also increases some higher energy multi-frequency and wider fractional frequency components, and the vibrating energy becomes larger.
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2007年第6期800-804,共5页
Journal of China University of Mining & Technology
基金
陕西省自然科学基金项目(2005A06)
关键词
宽频
激振器
动力学
wider frequency
vibrating centrifuge
dynamics
