摘要
在船舶轴系中安装动力减振器是减小轴系纵向振动的有效方法,而对动力减振器参数优化的研究是有效控制振动的关键之一。基于达朗伯原理建立船舶轴系纵向振动数学模型,导出动力减振器响应位移的动力放大系数解析式,运用动力谐调消振理论求解最优固有频率比和最优阻尼比。然后针对特定频带内动力减振器的参数优化,以固有频率比与阻尼比为设计变量,选择两种目标函数,采用最大值最小化问题的直接搜寻算法得到动力减振器参数的最优值。比较和分析了各种计算方法得到的结果,并研究动力减振器各参数对船舶轴系纵向振动影响,为轴系纵向振动控制及动力减振器的设计提供理论了依据。
Dynamic absorber is an effective instrument to reduce axial vibration of ship shafting and its parameters optimization will be the key to the reasonable control of vibration.Based on the mathematical model of axial vibration of the ship shafting,this paper derives the dynamic magnification factor of displacement at dynamic absorber with the D’Alembert principle and then solves the optimal natural frequency ratio and optimal damping ratio.In order to optimize the parameters of a dynamic absorber in a certain designated frequency range,a new optimization method which solves minimization problem of maximum value is presented.Two objective functions with natural frequency ratio and damping ratio as design variables are constructed.A comparison between the two algorithms mentioned above is made and the axial vibration influenced by dynamic absorber parameters is analyzed.Finally the theory related to the control of axial vibration of shafting and the design of dynamic absorber is provided.
出处
《中国造船》
EI
CSCD
北大核心
2010年第2期139-148,共10页
Shipbuilding of China
关键词
船舶、舰船工程
轴系纵振
动力减振器
参数优化
最大值最小化
ship engineering
axial vibration of shafting
dynamic absorber
parameters optimization
min-max value problem
