多失效模式下多状态伺服转塔刀架系统频率可靠性分析  

Frequency reliability analysis on multi-state servo turret systems with multiple failure modes

作　　者：刘晨曦[1] 陈南[2] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013 [2]东南大学机械工程学院,南京211189

出　　处：《振动与冲击》2017年第14期77-84,共8页Journal of Vibration and Shock

基　　金：国家"高档数控机床与基础制造装备"科技重大专项(2012ZX04002-032;2013ZX04012-032)

摘　　要：根据频率响应函数特性曲线的连续性,传统频率可靠性分析中仅将共振区与非共振区二分化值得商榷。提出了多失效模式下多状态频率可靠性分析方法,综合考虑影响系统固有频率各结构参数的随机性、激励频率的随机性,应用Monte Carlo仿真估计出系统频率可用度,并根据相关性分析识别各结构随机参数对系统频率可靠性的影响。将该方法用于基于多体系统传递矩阵法所建立的伺服转塔刀架系统动力学模型中,研究了其频率可用度以及与系统状态最为相关的结构参数,所得分析结果为系统优化设计提供了依据。According to the continuity of frequency response function curves, the method of simply dichomizing into resonant and non-resonant zones in conventional frequency reliability analysis is debatable. A new method for multi-state frequency reliability analysis with multiple failure modes was proposed, in which, the randomness of structural parameters and excitation frequency were taken into account. The Monte Carlo simulation was applied to estimate the system frequency availability, simultaneously, in accordance with the correlation analysis, the influences of each structural random parameter were identified. The new method was applied in a servo turret system, whose dynamic model was established by the transfer matrix method for multibody systems. Then, its frequency availability and the most related structural parameter were obtained, which provides a basis for further optimization.

关 键 词：伺服转塔刀架 多失效模式 多状态 频率可靠性 相关性 

分 类 号：TG659[金属学及工艺—金属切削加工及机床] TH113.1[机械工程—机械设计及理论]