Mechanical energy dissipation induced by sloshing and wave breaking in a fully coupled angular motion system. Part II: Experimental Investigation

TL;DR

This paper experimentally investigates how sloshing and wave breaking in a liquid-filled pendulum system dissipate energy, validating theoretical models and exploring effects of different liquids and excitation amplitudes.

Contribution

It provides experimental validation of energy dissipation mechanisms in liquid-filled pendulums, focusing on wave breaking and sloshing effects with various liquids and excitation levels.

Findings

Water causes significant energy dissipation due to wave breaking.

Different liquids exhibit varying dissipation characteristics.

External excitation amplitude influences energy transfer and dissipation.

Abstract

In Part I of this paper series, a theoretical and numerical model for a a driven pendulum filled with liquid was developed. The system was analyzed in the framework of tuned liquid dampers (TLD) and hybrid mass liquid dampers (HMLD) theory. In this Part II, in order to measure the energy dissipation resulting from shallow water sloshing, an experimental investigation is conducted. Accurate evaluations of energy transfers are obtained through the recorded kinematics of the system. A set of experiments is conducted with three different liquids: water, sunflower oil and glycerine. Coherently with the results of Part I, the energy dissipation obtained when the tank is filled with water can mainly be explained by the breaking waves. For all three liquids, the effects of varying the external excitation amplitude are discussed.