Ramin Jahadi - Sound and Vibration Research Center, R&D Department, Entekhab Industrial Group, ۸۳۳۳۱۱۴۴۴۵, Isfahan, Iran
Ali Loghmani - Department of Mechanical Engineering, Faculty of Engineering, University of Isfahan, ۸۱۷۴۶-۷۳۴۴۱, Isfahan, Iran

In this study, the tub vibration as one of the most common issues of washing machines (WM) is examined through numerical modeling and experimental investigation. The suspension sys-tem of the WM is simulated in the Adams/View software. In many researches, the dry friction dampers were simulated by the Coulomb friction model. Since, the non-linear behavior of the Coulomb model, the multibody dynamic model would be heavy in terms of computational costs. Thus, a smooth function is fitted to the experimental force-displacement of the damper and employed instead of the Coulomb function. Experimental tests are performed using a 300 gr unbalance magnet at the spin-dry cycle with the speed of 1400 rpm. The results depict that the model does well predict the vibration of the WM and can be used for design and optimiza-tio

Multibody dynamic model; Dry friction damper; Washing machine