盾构机多级行星减速器箱体模态分析与试验  

Testing and modal analysis on multi-stage planetary gearbox housing of shield tunnelling machine

作　　者：肖正明[1,2] 秦大同[1] 武文辉 周志刚[1,4] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400044 [2]昆明理工大学机电工程学院,昆明650093 [3]中信重型机械公司,河南洛阳471039 [4]河南科技大学车辆与动力工程学院,河南洛阳471003

出　　处：《重庆大学学报（自然科学版）》2012年第7期37-42,共6页Journal of Chongqing University

基　　金：国家863计划资助项目(2007AA041802)

摘　　要：建立了盾构机多级行星减速器箱体有限元模型,计算了其特征值问题,提取了箱体低阶固有频率及相应振型,并对其振动模式进行了分析。根据实验模态分析理论,采用脉冲激励法进行了减速器箱体的模态试验,运用最小二乘复频域法分析了模态数据,获取了箱体固有特性,并通过模态置信判据验证了实验模态参数。模态分析表明,理论结果和实验数据具有较好的一致性,相互检验了理论模型和试验方法的正确性,传动系统和箱体不会出现耦合共振现象,箱体高速端的局部振动较大,运行中箱体扭转振动模式较为突出。研究结果为盾构机减速器动态结构优化提供了理论依据和试验支撑。The finite element model is developed for the multi-stage planetary gearbox housing in shield tunnelling machine（STM）,and the the eigenvalue problem is solved by using block Lanczos method,and then the low order natural frequencies and corresponding modes are extracted.Based on the theory of experimental modal analysis,the modal testing is made for the gearbox housing by pulse excitation method.The least-squares complex frequency-domain（LSCF） estimation method is used to analyze the modal data,and the natural characteristics of housing is obtained.According to the modal assurance criterion（MAC）,the experimental modal parameters are validated.Modal analysis shows that the experimental data is coincided with analytical results,which indicates the accuracy of the theoretical model and testing method.The coupling sympathetic vibration is disappearing between the gears train and housing,the local vibration is large at the high speed side of gearbox housing,and the torsional mode is outstanding under operating condition.The research results provide theoretical basis and experimental support for the structural optimization of the gearbox of STM.

关 键 词：盾构机 行星齿轮 箱体 模态分析 测试 

分 类 号：TH11[机械工程—机械设计及理论]