PRINCIPAL COMPONENT DECOMPOSITION BASED FINITE ELEMENT MODEL UPDATING FOR STRAIN-RATE-DEPENDENCE NONLINEAR DYNAMIC PROBLEMS

GUO Qintao; ZHANG Lingmi; TAO Zheng

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PRINCIPAL COMPONENT DECOMPOSITION BASED FINITE ELEMENT MODEL UPDATING FOR STRAIN-RATE-DEPENDENCE NONLINEAR DYNAMIC PROBLEMS

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摘要

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.

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来源
《中国机械工程学报：英文版》 |2008年第5期|70-74|共5页
作者
GUO Qintao; ZHANG Lingmi; TAO Zheng;
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作者单位

College of Mechanical and Electrical Engineering;

Nanjing University of Aeronautics and Astronautics;

Nanjing 210016;

China;

Institute of Vibration Engineering;

Nanjing University of Aeronautics and Astronautics;

Nanjing 210016;

China;

College of Mechanical Engineering;

Zhengzhou University;

Zhengzhou 450001;

China;

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原文格式 PDF
正文语种 chi
中图分类机械动力学;
关键词
变形比率; 有限元模型; 动力学; 机械力学;

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PRINCIPAL COMPONENT DECOMPOSITION BASED FINITE ELEMENT MODEL UPDATING FOR STRAIN-RATE-DEPENDENCE NONLINEAR DYNAMIC PROBLEMS

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