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《China Civil Engineering Journal》 2006-12
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Analysis of time-variant stiffness excitation effects of elastoplastic dynamic structural systems

Huang Qingfeng Wang Quanfeng(Huaqiao University,Quanzhou 362011,China)  
The mechanism of yield-unloading excitation for elastoplastic dynamic structure systems is analyzed,and a method is presented to calculate the excitation effects.A study on the moving modal space indicates that there exists a Coriolis acceleration division in the motion of an elastoplastic dynamics structural system that correlates to the time-variant stiffness excitation leading to the yield unloading effect.Based on a time-dependent integral analysis in which the dynamic system stiffness is stationary in time,a supplementary energy equation is established to describe the changes in energy distribution caused by the changes of the secant stiffness vector.In the paper,a computational procedure for the time-variant stiffness excitation effect is proposed.
【Fund】: 国家自然科学基金(50578066);; 华侨大学科研资助项目
【CateGory Index】: TU399
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