A New Model of Damped Vibration Absorber

A new model for an untuned damped vibration absorber is put forward here in accordance with some actual mechanical structures,and its performance or responses to various system parameters of the model are also fully discussed.Generally speaking,machines should be designed to avoid working at their resonant frequencies.For some modern machines their working speeds often exceed their first even second resonant frequency,so,it is the same important for them to pass through their resonant frequencies steadily during starting or shutting down.In the paper the max peaks of the main system vibration amplitude and force transmissibility,as well as their corresponding peak frequencies are emphasized.     

结构动态特征灵敏度方法及在倍捻锭子上的应用

首先根据结构动力修改的实际需要,在一般灵敏度基础上,提出了相对灵敏度概念.其次结合实例对传统的具有N自由度的特征灵敏度公式就其实用性和理论完备性进行了分析.最后对连续体如何进行灵敏度分析,提出了一种方法,并以倍捻锭子为例进行了计算.     

一种新减振器模型参数的讨论

根据机械结构的实际需要,提出了一种新的动力减振模型,并讨论了系统参数对系统减振性能的影响.     

倍捻锭子的动力特性分析——模态综合法的应用

首先根据倍捻锭子的实际结构建立起计算模型,并详细介绍模态综合法对倍捻锭子的计算过程;另外传递矩阵法作为处理回转轴系的传统方法,这里只作简单介绍;最后运用模态测试技术对理论计算进行了校核.结果表明,理论计算和模态测试值基本吻合,这为今后对倍捻锭子的进一步研究提供依据.