The damping algorithm and design of viscous damper

The energy dissipation mechanism of hydraulic viscous damper was studied considering the shear thinning effect of dimethyl silicone oil. The analysis indicates that most of the energy loss occurs in the damping hole, which is mainly manifested as the damping loss along the path. The calculation formula of damping loss is simplified by assuming boundary conditions and the theoretical curve is drawn. The result shows that for the damping holes with the same size, the velocity and viscosity of oil are the key parameters to determine damping loss. But for different sizes damping structures, length- diameter ratio is the main factor affecting the energy loss, which in essence affects the pressure capacity of damping holes. Subsequently, the rationality of the above conclusions is verified by experiment, and two kinds of low-index hydraulic viscous damper were designed. The experimental results show that the algorithm can predict the mechanical properties of the damper well.