Dynamic analysis of damping mechanism in welded multilayered mild steel beams

Welded joints are often used to fabricate assembled structures in machine tools, automotive and many such industries requiring high damping. Vibration attenuation in these structures can enhance the dynamic stability significantly. A little amount of work has been reported till date on the damping capacity of welded structures. The present work outlines the basic formulation for the slip damping mechanism in multilayered and welded structures, vibrating under dynamic conditions. The numerical stability of the method and its applicability to actual working conditions have been investigated in the case of a tack welded cantilever beam structure with multiple interfaces. The developed damping model of the structure is found to be fairly in good agreement with experimental data.