Resumen de Analysis of the horizontal vibration characteristics of the gas-solid coupling between a super high-speed elevator car and a counterweight intersecting instantaneously
Li Li, Guifa Yang, Mingxing Liu
To explore the effect of the gas-solid coupling of a counterweight-car instantaneous intersection (CCII) on horizontal vibration in the real service environment of a super high-speed elevator, a three-dimensional gas-solid coupling numerical model for the CCII of super high-speed elevator was constructed. By using the dynamic layering grid technology, the transient law of “shear” aerodynamic load of the CCII of super high-speed elevator was analyzed by numerical simulation. And the effect of “shear” transient aerodynamic load on the horizontal vibration response of the car under the different opposite intersection speeds (v = 7 m/s, 10 m/s, 13 m/s, 16 m/s, 19 m/s, 22 m/s) was studied. Taking the 7 m/s speed condition as the real elevator object, the effectiveness of the three-dimensional calculation model of instantaneous intersection gas-solid coupling horizontal vibration was verified by experiments. The results showed that a huge transient “shear” lateral aerodynamic lift was generated in the process of the CCII, and the transient lateral aerodynamic lift difference was positively correlated with the running speed by cubic polynomial. In addition, with the significant increase of running speed, the typical digital characteristics of the car’s horizontal vibration acceleration and the relative increase of the vibration dose (VDV) for the gas-solid coupling of the CCII were 38.242%-234.129% and 23.567%-227.193%, respectively and the low-frequency maximum vibration amplitude increases significantly. This paper provides an effective analysis method for the gas-solid coupling horizontal vibration of super high-speed elevator counterweight-car instantaneous intersection, and provides a theoretical basis for the design of an accurate active vibration reduction control strategy for a super high-speed elevator
