考虑参数随机分布特性的碰摩转子动力学与可靠性  

Dynamics and reliability for rubbing rotor considering the characteristic of parameter's random distribution

作　　者：杨乐昌 张建国[1] 孙京[2] 韩建超[2] 

机构地区：[1]北京航空航天大学可靠性与系统工程学院可靠性与环境工程技术重点实验室,北京100191 [2]中国航天科技集团公司中国空间技术研究院北京卫星制造厂,北京100080

出　　处：《航空动力学报》2014年第8期1961-1967,共7页Journal of Aerospace Power

基　　金：国家重点基础研究发展计划(2013CB733000)

摘　　要：对改进型Jeffcott转子/定子系统,考虑其参数随机分布特性的影响,将稳定性分析与可靠性分析相结合,推导了碰摩转子的可靠度计算公式并使用FORM(1阶可能性方法)和CMC(Crude-Monte-Carlo)法计算其可靠度进而确定了可靠度要求为0.95时的碰摩问题边界.在分析各参数对转子稳态响应、安全域边界以及参数灵敏度影响的基础上,就一般的转子/定子系统碰摩问题给出了在摩擦因数、转速和间隙三参数下的解空间,即求出工程中对应可靠度要求的安全域与失效域.A kind of modified Jeffcott rotor/stator system was studied, both stability characteristic and reliability characteristic were analyzed while considering the influence of parameter＇s random distribution. A reliability formula was deduced as well as the reliability index of 0.95 is calculated by using the FORM （first order reliability method） and CMC （Crude-Monte-Carlo） method respectively. In addition, the boundary of rubbing problem is determined due to the reliability requirement. Furthermore, the effects of various parameters on the rotor steady-state response and security domain were discussed as well as the sensitivity of parameters also been considered. Finally, the solution of general rotor/stator rubbing problem is derived in the space of three parameters （coefficient of friction, speed and clearance） corresponding to the specific requirement in practice.

关 键 词：JEFFCOTT转子 定子系统 随机分布特性 动力学分析 可靠性 安全域边界 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程] TP393.4[自动化与计算机技术—计算机应用技术]