PRINCIPAL COMPONENT DECOMPOSITION BASED FINITE ELEMENT MODEL UPDATING FOR STRAIN-RATE-DEPENDENCE NONLINEAR DYNAMIC PROBLEMS |
| |
| Authors: | GUO Qintao ZHANG Lingmi TAO Zheng |
| |
| Affiliation: | [1]College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China [2]Institute of Vibration Engineering,Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China [3]College of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China |
| |
| Abstract: | Thin wall component is utilized to absorb impact energy of a structure.However,the dynamic behavior of such thin-walled structure is highly non-linear with material,geometry and boundary non-linearity.A model updating and validation procedure is proposed to build accurate finite element model of a frame structure with a non-linear thin-walled component for dynamic analysis.Design of experiments(DOE)and principal component decomposition(PCD)approach are applied to extract dynamic feature from nonlinear impact response for correlation of impact test result and FE model of the non-linear structure.A strain-rate-dependent non-linear model updating method is then developed to build accurate FE model of the structure.Computer simulation and a real frame structure with a highly non-linear thin-walled component are employed to demonstrate the feasibility and effectiveness of the proposed approach. |
| |
| Keywords: | Strain-rate-dependent Finite element model updating Nonlinear dynamics Response surface |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
