Research On How The Disturbance Of Gas Effect On Dynamic Characteristic Of High-speed Elevator

Elevator is a kind of communication facility, which develops along with high-rise constructions. Its status is equal to'vertical movement car'. In order to saving passengers'time and improving the efficiency, the high-speed or super high-speed elevator is needed to slove this transport problem. However the aerodynamic force on car is improving with the elevator's speed, so studying the high-speed elevator's aerodynamic force has great significance on supressing the elevator vibration and improving the elevators'comfort.This thesis is divided into six chapters. its most work is described as below:In chapter 1: Introduction. The background and significance of the dissertation are introduced, the development trend and the current research situation of dynamic characteristic of elevators'mechanical systems and elevators'aerodynamic in the world are expatiated, and the main content of this dissertation are proposed.In chapter 2: Elevator's foundation. Introduct some basic knowledge about elevator, including: elevator's configuration, how to calculate the elevator's speed curve, speed's PID control method, the cause of elevator vibration and the principal method of modal, transient response. All of these lay a basis for elevator's theoretical studying and simulation.In chapter 3: The dynamic model of elevator's mechanical system. In this chapter from the system's dynamic equations, and research on the structure and vibration mechanism of elevator, a 18-degree-of-freedom dynamic model in vertical direction and a 4-degree-of-freedom dynamic model in lateral direction are established.In chapter 4: Elevator's synthetical dynamic model. In this chapter base on the formation mechanism of piston wind, and compare the aerodynamic model of high-speed trains through tunnels and the equipment movement in mine, a aerodynamic force on cars in virtical direction is established. And then amend the virtical dynamic model of elevator in running. Using the control equations of flow field, solving methods and the computational fluid dynamics software FLUENT, simulate the air field in hoist with different situations. Then a aerodynamic force in lateral direction is established. And then amend the lateral dynamic model of elevator in running.In chapter 5: Simulation study. According to an elevator original configuration parameters, do model analysis with different situations, such as add gas disturbance and without, different speeds, different car's shapes, then study the air disturbance's effect on natural frequency of elevator system. Optimize the variable parameters in vertical direction and simulate the elevator's move process. Study the air disturbance's effect on the lateral virbation's largest peak-to-peak and A95. And simulate the lateral virbation under a given elevator's speed curve.In chapter 6: The chief work and innovations of this dissertation have been summarized, and further research subjects have been proposed.The main innovation of this thesis:1. Base on the formation mechanism of piston wind, compare the aerodynamic model of high-speed trains through tunnels and the equipment movement in mine, a aerodynamic force on cars in virtical direction is established. And then amend the virtical dynamic model of elevator in running.2. Using the control equations of flow field, solving methods and the computational fluid dynamics software FLUENT, simulate the air field in hoist with different situations. Then a aerodynamic force in lateral direction based on simulation is established. And then amend the lateral dynamic model of elevator in running.3. Optimize the variable parameters in vertical direction and simulate the elevator's running process. Study the air disturbance's effect on the lateral virbation's largest peak-to-peak and A95. And simulate the lateral virbation under a given elevator's speed curve.