反共振时上质体振幅最小的反共振振动机动力学分析与仿真  

Dynamic analysis and simulation for anti-resonant vibration machines with smallest upper body's amplitude when anti-resonant vibration happens

作　　者：刘劲涛[1] 刘杰[1] 李小号[1] 戴丽[1] 柳洪义[1] 

机构地区：[1]东北大学机械工程与自动化学院,沈阳110004

出　　处：《振动与冲击》2009年第9期109-111,134,共4页Journal of Vibration and Shock

基　　金：国家自然科学基金资助(50775029);辽宁省教育厅高等学校科学技术基金项目(批准号2004D089)

摘　　要：针对反共振振动机振幅不稳定的问题,提出了一种能使原点反共振振动机振幅稳定的参数选择方法。这种方法的中心思想是令发生反共振时上质体的振幅最小。在这种情况下,当激振频率发生变化时,上下质体振幅的变化是一致的。同时使两共振点之间的距离要离得足够远,在反共振点附近上下质体的幅频响应曲线比较平缓。从而使振幅稳定性基本上达到实用要求。在需要振幅精度比较高的场合,也只需小范围调节即可实现。For the problem of amplitude instability of an anti-resonant vibration machine,a kind of method choosing parameters which made the driving-point amplitude of the anti-resonant vibration machine stable was put forward. The central idea of this method was to let the upper body's amplitude smallest when anti-resonant vibration happens. Under this situation,when the exciting frequency varied,the amplitudes of the machine's upper body and lower body varied synchronously. At the same time,the distance of the two resonant points should be large enough,then near the anti-resonant point the amplitude-frenquency response curves of the upper body and the lower body would be flat. Therefore,the stability of the amplitude could meet the application requirements. For the occasions in need of high amplitude accuracy,small scale adjustment could bring out.

关 键 词：反共振 振动机械 振幅稳定 振幅控制 

分 类 号：TD156[矿业工程—矿山地质测量]