摘要
船舶推进轴系受到螺旋桨非定常激振力作用,产生纵向振动。通过建立船舶推进轴系分布质量模型,分析轴系纵向固有频率及影响因素;通过有限元分析软件Patran仿真分析被动式动力吸振器和主动控制方法对轴系纵向振动的控制效果。研究表明:螺旋桨质量和附链水对轴系固有振动特性影响较大;被动式动力吸振器受吸振器质量的限制,不如主动控制方法对轴系纵向振动控制效果好;主动控制力在达到激振力一半以上时就可以取得较好的控制效果,但必须考虑系统时滞的影响。
Under the effect of unsteady exciting force, propulsion shafting arose le analyzed the longitudinal inherent frequency and influence factors of the shafting by mass model. And we simulated the control effect of passive vibration absorber and ngthways vibration. We building the distributed active controller on the lengthways vibration of shafting by the finite element software Patran. Studies indicate that the mass of pro- peller and attached water have an important influence on the inherent characteristic of shafting. Limited by the mass of absorber, the control effect of passive vibration absorber is less than the active control method. Active control method can get good control effect when the control force is bigger than 50 percent of the exciting force, but the time lag must be taken into account.
出处
《兵器装备工程学报》
CAS
2016年第1期23-26,共4页
Journal of Ordnance Equipment Engineering
关键词
轴系
纵向振动
被动控制
主动控制
时滞性
shafting
longitudinal vibration
passive control
active control
time lag
