Numerical investigation of the effect of liquid filling on free oscillations of one-degree-of-freedom body

In this work, free oscillations of a one-degree-of-freedom solid body containing a rectangular cavity partially filled with a viscous fluid are considered. The horizontal and vertical baffles, as well as vertical screens, were arranged in the cavity. The effect of a fluid flow on the rate of damping of the solid body oscillations at different positions of insertions in the cavity was studied. The cases of both laminar and turbulent flow of the fluid in the cavity were considered. It has been found that the use of the laminar flow model and coarse mesh provides a reasonably accurate description of the motion of a body with a cavity. Moreover, in this case, the computational time is significantly less than that for the turbulent flow model. It has been shown that the oscillation damping rate for a body with a cavity partially filled with a viscous fluid reached the highest value if the cavity contains two vertical screens. Nevertheless, the number of impermeable baffles did not significantly affect the rate of oscillation damping.