Strategic Study of CAE >> 2005, Volume 7, Issue 9
Investigation on Dynamic Structural Modification of Hydraulic Excavator Work Device
1. State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China
2. State Key Laboratory of CAD & CG , Zhejiang University, Hangzhou 310027, China
Next Previous
Abstract
To improve dynamic performance’s optimization efficiency of hydraulic excavator’s work device, the dynamic modification simulation of the structure was investigated by dual modal space method based on modal analysis. The results show that the mass modification remarkably influences the first and second order natural frequency and damp ratio, and has little effect on high order modal frequency and damp ratio. The stiffness modification influences the first five modal frequency and damp ratio remarkably; high order modal frequency and damp ratio are sensitive to stiffness modification. The investigating results reveal the relationship between modal parameter modification and dynamic characteristic of the structure, and lay the foundation for improving overall quality of mechanical products.
Keywords
dual modal space method ; model shape ; hydraulic excavator ; work device
References
[ 1 ] 吕振华.结构动力学修改重分析方法的发展[J].计算结构力学及其应用, 1994, 11 (1) :85~91 link1
[ 2 ] 冯培恩, 邱清盈, 潘双夏, 等.机械产品的广义优化设计进程研究[J].中国科学 (E辑) , 1999, 29 (4) :338~346 link1
[ 3 ] Snyder V W.Structural modification and modalanalyses-a survey[J].International Journal ofAnalytical and Experiment Modal Analysis, 1986, 1 (1) :45~52
[ 4 ] 张令弥.动态有限元模型修正技术及其在航空航天结构中的应用[J].强度与环境, 1994, 17 (2) :01~17 link1
[ 5 ] Wallack P, Skoog P, Richardon M H.Comparison ofanalytical and experimental rib stiffener modificationsto a structure[A].The 8th IMAC Conference[C].Orlando, Florida, 1989.1~9
[ 6 ] 郑万泔.CRAS动力修改原理[J].振动、测试与诊断, 1990, 10 (1) :15~20 link1
[ 7 ] Wallack P, Skoog P, Richardon M H.Simultaneousstructural dynamics modification (S2DM) [A].The7th IMAC Conference[C].Orlando, Florida, 1988.1~7