Nonlinear Dynamic Vibration Absorber Applied in a High-Speed Elevator System

In this work, the horizontal response of a 4 degree-of-freedom vertical transport model excited by rail-guide deformations, and with a nonlinear dynamic vibration absorber is numerically investigated. The levels of the vibration and comfort in cabin, and the efficiency of using a nonlinear dynamic vibration absorber to reduce cabin vibrations, is numerical analyzed. The lateral displacement of the cabin is considered by an external disturbance that represents the deformations and misalignment of the rails-guide. The levels of lateral accelerations of the elevator and the levels of comfort felt by passengers are analyzed in accordance with ISO 2631 and BS 6841. The results of numerical simulations demonstrated that the configuration of the appropriate parameters of the DVA is essential to ensure a better level of comfort to passengers, and that the increase in speed associated with the use of nonlinear dynamic vibration absorber can improve the level of comfort reducing accelerations in the cabin.