Analysis of the gas-solid coupling horizontal vibration response and aerodynamic characteristics of a high-speed elevator

Jing

et al. 2023

Self Cite

PurposeThis paper aims to guide the implementation of noise reduction measures in hoistway and reduce the aerodynamic noise generated by elevator operation, this paper aims to propose an aerodynamic noise analysis method that can solve the flow field in hoistway.Design/methodology/approachA turbulence-acoustic model solving the flow field in a hoistway and a numerical wind hoistway model of the ultra-high-speed elevator were established by using large eddy simulation (LES) and Curle acoustic theory.FindingsThe characteristics of pulsating flow field and aerodynamic noise around ultra-high-speed elevator are analyzed. The asymmetric characteristics of the flow field could be observed using the turbulent kinetic energy and the instantaneous vortexes in the wind hoistway model. Vortex shedding, air flow separation and recombination around the car were the key factors for aerodynamic noise generation. The sound pressure level was approximately linear to the logarithm of car speed. The increase of car deflection angle in a certain range would reduce the peak frequency of wake noise and increase the sound pressure level (SPL) value.Originality/valueThis paper provides important guidance for researches studying the aerodynamic noise in the hoistway and the technical personnel that look for the reduction measures, which greatly improves the shortcomings in the numerical simulation of the aerodynamic noise of the hoistway.

Section: Numerical Computation Model and Verificationmentioning

confidence: 99%

Flow behavior and aerodynamic noise characteristics of ultra-high-speed elevator based on large eddy simulation

Jing

et al. 2023

Self Cite

Proceedings of the Institution of Mechanical Engineers, Part C:

“…The development of an efficient and affordable design method for elevator vibration reduction has emerged as a crucial technical hurdle that necessitates immediate attention. [1][2][3] The modeling and analysis of vibration-related components in high-speed elevators are essential for designing effective vibration reduction solutions. To investigate the correlation between the variability of design parameters and the vibration acceleration in a high-speed elevator system, Wang et al 4 random perturbation theory to construct a vibration model that integrates random parameters.…”

Section: Introductionmentioning

confidence: 99%

“…The development of an efficient and affordable design method for elevator vibration reduction has emerged as a crucial technical hurdle that necessitates immediate attention. 1–3…”

Section: Introductionmentioning

confidence: 99%

Surrogate-model-based dynamic-sensing optimization method for high-speed elevator car horizontal vibration reduction

Cheng,

Zhang,

Wang

et al. 2024

The horizontal vibration of high-speed elevators has a significant impact on ride comfort and safety stability. Plenty of intelligent methods have been implemented in horizontal vibration reduction. The conventional optimization process for vibration reduction design involves conducting numerous complex dynamics simulations to establish the correlation between design parameters and vibration response. However, this method is inefficient and costly due to the demanding computational power requirements and time-consuming nature of the simulations. This study proposes a surrogate-model-based dynamic-sensing optimization method. A Kriging model is developed based on dynamics simulations, providing an efficient approach for obtaining the vibration response with specified design parameters. The DSPSO algorithm was proposed by incorporating perceptual particles and environmental adaptation mechanisms into the PSO algorithm. The DSPSO algorithm can be nested and interact with the Kriging model to optimize design parameters. During evolution, feasible and uncertain solutions are extracted into the sample space to enhance the accuracy of the Kriging model. The effectiveness of the proposed method is validated using both the ZDT series test functions and elevators from Canny Elevator Co., Ltd.

“…Liu et al (2019) and Yang et al (2019) developed a horizontal vibration dynamic model for a car experiencing excitation, and analyzed the influence of the fluid on the horizontal vibration acceleration of the car. Based on the arbitrary Lagrangian–Euler method and the finite volume method, Liu et al (2021) compared and analyzed the effects of unidirectional and bidirectional coupling on the horizontal vibration response of the car. Qiu et al (2021) developed a fluid–structure coupling model for the horizontal vibration of a high-speed elevator car, decoupled it using the solution results of fluid–structure coupling, and analyzed the effects of the high-speed elevator dynamic parameters on the horizontal vibration of the car.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the horizontal vibration response under gas–solid coupling throughout the entire high-speed elevator operating process

Shi

Journal of Vibration and Control

et al. 2022

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High-speed elevator cars affected by external excitations exhibit complex horizontal vibration responses during their entire operating processes. To accurately explore the horizontal vibration response of a car and the response differences between the operating processes, a gas–solid coupling model for the entire high-speed elevator operating process was developed based on the finite volume method, Lagrange’s theorem, and the external excitations obtained from dynamic mesh technology and the time-variant guideway excitation simulation method. The differences in the car’s horizontal vibration acceleration and the effect of the fluid load disturbance during different high-speed elevator operating processes were analyzed by considering the different operating characteristics of the car during its acceleration–uniform speed–deceleration process. The feasibility of the model and modeling method were verified by testing an actual 7 m/s high-speed elevator. The results showed that the horizontal vibration acceleration of the car reached its maximum value during the uniform speed process, and the shaft fluid pressure load had the most significant effect on the horizontal vibration response of the car during the deceleration process.