Novel Principle of Mechanical Energy Dissipation: (Part 2-Dynamic Performances of Colloidal Damper)

摘要

First part of the present work presented the working principle and the static performances of, a Colloidal Damper (CD). Second part deals with experimental investigations concerning the CD dynamic performances. Porous matrix is composed from silica gel S3 with labyrinth architecture; water is considered as associated lyophobic liquid. CD dynamic test rig and the measuring technique of the dynamic hysteresis are described. Two design solutions from a practical point of view of the dynamic test rig are proposed: single and double CD. A CD effective only for positive force will be called single; when CD is operative both for positive and negative forces, as in the most actual applications, it will be called double. Considering cycles obtained for pure water and colloidal suspension, and extracting the structural influence, one finds the variation of the CD dissipated energy and efficiency versus working frequency. Our findings agree with the previously published data.