This thesis derivates the static character of servo-valve used for hydraulic system of hydraulic oscillation unit for Jiangyin large-size round billet caster and linear function,flow equation for hydraulic actuator,and transfer function,natural frequency,and hydraulic damping ratio for the system and verifies by substituting actual number,which fulfill fully normal production conditions.

The tests of hydraulic damper are one of the important methods to detect the various technical parameters of damper.

Uplift control study on vertical unanchored storage tank with hydraulic damper system;

Simulation of hydraulic damping characteristic for motorcycle′s cylindrical shock absorber;

Dynamic shear modulus and damping ratio of saturated clay;

Experimental study on effect of initial intermediate principal stress coefficient on dynamic shear modulus and damping ratio of medium-dense fly ash;

A simplified method for calculating modulus ratio and damping ratio considering vertical seismic motion;