高速曳引电梯机械系统振动特性研究
发布时间：2018-09-03 08:41
【摘要】：全球经济快速发展的驱动下,高层建筑数量不断增多,中高速曳引电梯满足了高层建筑高效利用的需求。但速度和行程的提高加剧了电梯的振动,而电梯振动又对乘坐舒适性和安全性产生重要影响,故对电梯振动特性的分析研究尤为重要。本论文对高速曳引电梯机械系统进行建模,得出高速曳引电梯机械系统各阶固有频率在不同工况下的变化,并仿真分析滚动导靴和轿厢侧部减振橡胶对振动特性的影响,为高速曳引式电梯系统的减振设计提供依据。本文主要研究内容如下：(1)从结构和组成上分析了高速曳引电梯振动产生原因,通过模态分析机械系统在井道内的振动响应特性,为分析高速曳引电梯机械系统各阶固有频率在不同工况下的变化奠定理论基础。(2)考虑到钢丝绳的离散状况,对电梯垂直方向进行振动建模,将电梯轿厢的运行过程离散化,推导出19自由度垂直振动模型；通过模态分析得出高速曳引电梯机械系统各阶固有频率随轿厢载荷、轿厢在井道中位置的变化情况。(3)考虑到滚动导靴对电梯水平方向运动特性的影响,分析了滚动导靴与导轨的相互作用,推导出滚动导靴的径向动力学模型,建立了8自由度高速曳引电梯水平方向振动模型,分析了电梯水平方向的振动特性。(4)通过MATLAB/SIMULINK建立高速曳引电梯水平方向仿真模型,分析电梯系统振动位移、速度、加速度随时间的变化曲线,并仿真分析了滚动导靴弹簧和轿厢侧部减振橡胶刚度系数对电梯水平振动的影响,为实现高速曳引电梯减振防振提供了依据。
[Abstract]:Driven by the rapid development of global economy, the number of high-rise buildings is increasing. However, the increase of speed and stroke intensifies the vibration of elevator, and the vibration of elevator has an important effect on ride comfort and safety, so it is very important to analyze and study the vibration characteristics of elevator. In this paper, the mechanical system of high speed traction elevator is modeled, and the natural frequencies of each order of the mechanical system of high speed traction elevator are obtained under different working conditions, and the effects of rolling guide boots and side damping rubber of car on vibration characteristics are analyzed by simulation. It provides the basis for the vibration reduction design of high speed traction elevator system. The main contents of this paper are as follows: (1) the causes of the vibration of the high-speed traction elevator are analyzed from the structure and composition, and the vibration response characteristics of the mechanical system in the shaft are analyzed by modal analysis. It lays a theoretical foundation for analyzing the variation of the natural frequencies of each order of the mechanical system of high speed traction elevator under different working conditions. (2) considering the discrete condition of wire rope, the vibration modeling of elevator vertical direction is carried out, and the running process of elevator car is discretized. The vertical vibration model of 19 degrees of freedom is derived, and the natural frequencies of each order of the mechanical system of high-speed traction elevator are obtained by modal analysis with the loading of the car. (3) considering the influence of the rolling guide shoe on the horizontal movement characteristic of elevator, the interaction between the rolling guide shoe and the guide rail is analyzed, and the radial dynamic model of the rolling guide shoe is deduced. The horizontal vibration model of high speed traction elevator with 8 degrees of freedom is established, and the vibration characteristics of the elevator in horizontal direction are analyzed. (4) the simulation model of horizontal direction of high speed traction elevator is established by MATLAB/SIMULINK, and the vibration displacement and velocity of elevator system are analyzed. The change curve of acceleration with time and the influence of rolling guide shoe spring and rubber stiffness coefficient on horizontal vibration of elevator are simulated and analyzed, which provides the basis for the realization of vibration control and vibration proof of high-speed traction elevator.
【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU976.3
本文编号：2219465
[Abstract]:Driven by the rapid development of global economy, the number of high-rise buildings is increasing. However, the increase of speed and stroke intensifies the vibration of elevator, and the vibration of elevator has an important effect on ride comfort and safety, so it is very important to analyze and study the vibration characteristics of elevator. In this paper, the mechanical system of high speed traction elevator is modeled, and the natural frequencies of each order of the mechanical system of high speed traction elevator are obtained under different working conditions, and the effects of rolling guide boots and side damping rubber of car on vibration characteristics are analyzed by simulation. It provides the basis for the vibration reduction design of high speed traction elevator system. The main contents of this paper are as follows: (1) the causes of the vibration of the high-speed traction elevator are analyzed from the structure and composition, and the vibration response characteristics of the mechanical system in the shaft are analyzed by modal analysis. It lays a theoretical foundation for analyzing the variation of the natural frequencies of each order of the mechanical system of high speed traction elevator under different working conditions. (2) considering the discrete condition of wire rope, the vibration modeling of elevator vertical direction is carried out, and the running process of elevator car is discretized. The vertical vibration model of 19 degrees of freedom is derived, and the natural frequencies of each order of the mechanical system of high-speed traction elevator are obtained by modal analysis with the loading of the car. (3) considering the influence of the rolling guide shoe on the horizontal movement characteristic of elevator, the interaction between the rolling guide shoe and the guide rail is analyzed, and the radial dynamic model of the rolling guide shoe is deduced. The horizontal vibration model of high speed traction elevator with 8 degrees of freedom is established, and the vibration characteristics of the elevator in horizontal direction are analyzed. (4) the simulation model of horizontal direction of high speed traction elevator is established by MATLAB/SIMULINK, and the vibration displacement and velocity of elevator system are analyzed. The change curve of acceleration with time and the influence of rolling guide shoe spring and rubber stiffness coefficient on horizontal vibration of elevator are simulated and analyzed, which provides the basis for the realization of vibration control and vibration proof of high-speed traction elevator.
【学位授予单位】：山东建筑大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TU976.3
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