Study on damping property of polyurethane by means of viscoelastic damping structure;

Damping property of polyurethane is studied in wide frequency range by studying viscoelastic damping structure.

Theoretical analysis on modern control over the viscoelastic structure;

At the same time the test results and the calculating results of the viscoelastic structure are also compared.

In this paper, according to the damping absorption principle of the viscoelastic structure, the variance matrix of the viscoelastic structure response is got by using Lyapunov equation in the random vibration theory, then the damper s optimum installation is carried out when the interstory drift variance matrix is taken as control function, and an example is given.

Calculating models of lead viscoelastic damper;

In this paper, the principle configuration and characteristicses of the mixed lead viscoelastic damper are introduced.

Based on the example of the Chuxiong Yunnan-Huidong Guangdong ±800 kV transmission line system,this paper investigates the effect of the jumping induced by the ice-shedding with four cases,and analyses the vibration controls under six installing cases of the lead viscoelastic dampers by using the nonlinear time history analysis method.

Based on a certain project, the lead viscoelastic dampers with lead double layers of glue elastic material and inside are used to control the wind performance.

Based on the example of Jindongnan-Nanyang-Jingmen 1000kV transmission lines system,jumping responses induced by ice-shedding in four cases are investigated,and the vibration controls in six installing cases of lead viscoelastic dampers using the nonlinear time history analysis method are studied.