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; Yang, Guifa; Liu, Mingxing

doi:10.1080/15397734.2023.2255632

Cited by 1 publication

(1 citation statement)

References 29 publications

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“…Some scholars mainly analyze the two-dimensional hoistway, and the study conditions mainly involve a uniform state or instantaneous intersection process. Li et al 16 established a three-dimensional gassolid coupling numerical model for the instantaneous intersection between the car and the counterweight of the ultra-high-speed elevator, analyzed the transient rule of the aerodynamic load of the ultrahigh-speed elevator, and studied the influence of the transient aerodynamic load on the horizontal vibration of the car at different intersection speeds. Zhang et al 17 constructed a three-dimensional carcounterweight intersection model and analyzed the law of the influence of different length ratios, blocking ratios, and spacing on the aerodynamic force of the car and the counterweight.…”

Section: Introductionmentioning

confidence: 99%

Study on the aerodynamic characteristics and ventilation effects of ultra-high-speed elevator car-counterweight system under the influence of multiple parameters

Zeng,

He,

Zhang

et al. 2024

Physics of Fluids

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When the ultra-high-speed elevator car-counterweight system runs opposite each other, significant piston effects are caused, seriously affecting the elevator operation's stability. In order to explore the aerodynamic characteristics of the whole operation process of a car-counterweight system under multi-parameters, this study first establishes a three-dimensional transient model of the car-counterweight system and a multi-region dynamic layering numerical simulation method based on this model is proposed. Then, the actual elevator experiment validates the correctness of the model and the method. Finally, the influence rules of key parameters on the car's aerodynamic characteristics and ventilation effect are analyzed, and the car's aerodynamic characteristics at intersection time are analyzed emphatically. The results show that with the increase in the blocking ratio, the pressure drag and viscous drag have similar change trends at each stage, but the influence of pressure drag is more significant. The air displacement ratio increases by 34.1%, 75.8%, and 117.3%, respectively. With the increase in the hoistway height, the air displacement ratio decreases by 0.9%, 2.4%, and 2.9%, respectively. The spacing significantly affects the car's aerodynamic characteristics at the intersection time. The drag peak increases by 6.8%, 13.6%, and 20.5% and the lift peak by 21.2%, 47.8%, and 82.5%, respectively.

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Section: Introductionmentioning

confidence: 99%