摘要
在分析影响系数法平衡原理的基础上,提出一种基于有限元模型分析的转子动平衡影响系数求解方法。根据转子系统物理结构尺寸,借助DyRoBeS软件建立转子系统有限元模型,通过在模型中所关注的节点施加虚拟不平衡量,分析转子系统的横向振动响应,获得转子在平衡转速下节点的振动幅值和相位。探讨了相位基准位置对影响系数的影响规律,计算出转子系统各平衡转速下的影响系数,实现无试重条件下的转子动平衡。以美国Bently单跨双转盘实验台为对象,实测平衡转速分别在临界转速前后的影响系数,结果表明,该方法获得的影响系数与实测结果基本相符,且相对误差较小。应用该方法可减少对动平衡经验的依赖和启机次数,节省动平衡时间和成本。
A new solving method of influence coefficient for rotor dynamic balancing is developed on the basis of analyzing the principle of influence coefficient balancing.The finite element model is established based on the rotor physical structure by using DyRoBeS software.The lateral vibration response is analyzed after adding virtual unbalance force on the attention node of finite element model.Meantime,the law of phase benchmarks to influence coefficient is studied.Therefore,it can be calculated the balancing speed influence coefficients of the rotor system according to the node vibration amplitude and phase of the balancing speed,which take the rotor dynamic balancing without trial weight.Finally,the bent single span and single disk test rig is taken as an example to measure the influence coefficients below the critical speed and over the critical speed,respectively.The results show that the influence coefficient of the proposed method is consistent with the measured method and the relatively error is small.This method can reduce the dependence of dynamic balancing experience and the on-off times to save the dynamic balance time and cost.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2013年第6期998-1002,1094,共5页
Journal of Vibration,Measurement & Diagnosis
基金
国家重点基础研究发展计划("九七三"计划)资助项目(2012CB026000)
国家自然科学基金资助项目(51135001
51205121)
关键词
有限元模型
转子动平衡
无试重
影响系数
相位基准
finite element model,rotor dynamic balancing,no trial weight,influence coefficient,phase benchmark
