Study on equivalent damping calculation for hydraulic damper of helicopter rotor;

Based on the classic composites laminates theory,the stiffness matrix and the equivalent damping matrix of the laminates which can be described by elastic constants and damping constants were determined.

And the equivalent damp of super-elastic effect o f TiNi Shape Memory Alloy is calculated by simulating its cycle curve using experimen t data.

And we calculate equivalent damp of super-elastic effect of TiNi Shape Memory Alloy through simulating its cycle curve.

According to the characteristics of the series-base-isolation structure,the calculation formulas for the equivalent damp and equivalent stiffness of the structure were given,and the desirable equivalent damp could be obtained.

The results showed that a significant vibration attenuation is available due todifferent forms of oil-film damping though they vary with different oil-film parameters.

Determination for equivalent damping ratio of composite structure and its application in finite element analysis;

Analysis of equivalent damping ratio of high-rise structure building TLD system;

Calculation method for additional equivalent damping ratio of energy dissipation structure

The damping ratio is studied by the complex mode method, the forcing decoupling method, and the equivalent damping method based on deformation energy.