A non-linear time invariant dynamic model of the suspension system of a front-loaded washing machine has been formulated, programmed for simulation, and assessed experimentally A drum mounted in a tub which is hung to the cabinet by three linear helical springs and supported by two dry-friction dampers rotates together with an eccentric laundry mass. The displacement responses due to centrifugal excitation have been obtained for the spin-dry cycle ranging from 0rpm to 650rpm until steady-state has been reached The comparison of simulation and experimental results has demonstrated the validity of the model by predicting the steady-state and transient peak-to-peak vertical and horizontal amplitudes within 5% and 11% errors, respectively The mechanical performance and the “striking” and “stepping” phenomena can be assessed for prototype design purpose by undertaking a parametric investigation to the end of optimizing the design.

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