机械结构的理论模态分析方法  

Modal Shape Analysis Methods of Machine Structure

作　　者：杨为[1] 邱清盈[2] 胡建军[1] 

机构地区：[1]重庆大学机械传动国家重点实验室,重庆400030 [2]浙江大学国家重点实验室,浙江杭州310027

出　　处：《重庆大学学报（自然科学版）》2004年第6期1-4,共4页Journal of Chongqing University

基　　金：国家自然科学基金资助项目(50205026);国家"863"高技术研究发展计划资助项目(2001AA412110);中国博士后科学基金资助项目(2003033540)

摘　　要：系统研究了灵敏度Lanczos迭代法、古杨恩聚缩法(Guyan)、同步矢量迭代法(SVI)3种求解复杂机械结构振动模态的分析方法,指出了影响计算精度的主要原因,针对古杨恩聚缩法提出了3点主自由度选择原则。用这3种方法对标准算例进行了计算,结果表明灵敏度Lanczos迭代法是最优方法,并用此方法求解了液压挖掘机工作装置中斗杆的振动模态,为合理选择复杂机械结构动态特性求解方法提供了理论依据。The iterative Lanczos-reduce method for sensitivity analysis, the Guyan condensed method and the iterative synchronous vector methods in finite element modal are studied in order to solve the dynamic characteristic of complicated machine system. The primary reasons influenced on calculation precision are pointed out. The principia of master freedom for Guyan condensed method are put forward. The calculation precision of three methods is compared with the same standard finite element model. The iterative Lanczos-reduce method for sensitivity analysis is proved to be optimum analysis and the eigenvalue of arm in work device of hydraulic excavator in finite element model is solved with iterative Lanczos-reduce method for sensitivity analysis. The theory basis is provided for reasonable choose to solve the dynamic of complicated machine structure.

关 键 词：有限元模型 振动模态 液压挖掘机 工作装置 

分 类 号：TU621[建筑科学—建筑技术科学]