基于灵敏度Lanczos迭代法的摩托车曲轴箱模态分析  

Shape Analysis for The Motorcycle Crankcase Based on Iterative Lanczos-Reduce Model

作　　者：吴国洋[1] 

机构地区：[1]四川机电职业技术学院机械系,四川攀枝花617000

出　　处：《重庆工学院学报》2005年第5期6-8,11,共4页Journal of Chongqing Institute of Technology

基　　金：国家科技攻关资助项目(2001BA311A05-4).

摘　　要：探讨了灵敏度Lanczos迭代法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,采用灵敏度Lanczos迭代法建立了曲轴箱的有限元动力学模型,研究了镁铝合金曲轴箱材料替代的固有特性,并用此方法求解了摩托车曲轴箱的振动模态,为摩托车曲轴箱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 in finite element modal is studied in order to solve the dynamic characteristic of the motorcycle crankcase. The primary reasons influencing on calculation precision are pointed out. The dynamic characteristic of Crankcase influences the structure strength. The dynamic model of crankcase is established by finite element method, and the structure is rebuilt. The results show the dynamic performance of the Crankcase and offer references for the application of magnesium alloy in motorcar and motorcycle.The shaking model shape of Crankcase is worked out,and a theoretical reference is proposed for dealing wich the by namic charateristic of Crankcase.

关 键 词：曲轴箱 摩托车 灵敏度 模态分析 有限元动力学模型 结构振动模态 结构动态特性 迭代法求解 复杂机械 计算精度 固有特性 镁铝合金 求解方法 

分 类 号：TH113[机械工程—机械设计及理论] U483[交通运输工程—载运工具运用工程]