基于振动及能量耗散的轴向绳移系统边界阻尼控制

发布时间：2018-01-12 17:36

本文关键词：基于振动及能量耗散的轴向绳移系统边界阻尼控制　出处：《合肥工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：升降电梯,索道和传送带等常见工程设备的横向振动问题严重影响实际工程中的使用效果和安全性,这些工程设备的物理模型均可简化为轴向绳移系统。因此,对轴向绳移系统横向振动问题的研究就显得十分必要。本文以轴向绳移系统为研究对象,首先给出了轴向绳移系统的简化力学模型,利用哈密顿原理建立系统动力学方程。其次结合有限元思想,提出绳移系统的横向位移响应及振动能量两种计算方法。接着基于传播波在绳系中反射的振动周期和固有振型规律,研究轴向绳移系统的固有频率公式,对比分析定长度和变长度两种绳移系统固有频率的差异,探讨张紧力和轴向移动速度的变化对绳移系统固有频率的影响。最后通过在系统边界处安装阻尼装置,研究系统横向振动的边界阻尼控制。基于绳移系统的边界力平衡方程和能量方程,研究反射波与入射波的幅值比值和能量比值关系,建立控制函数,确定边界阻尼系数范围以及阻尼系数最优值,达到绳移系统的横向振动控制目的。以上研究为工程轴向绳移系统设备的设计及分析提供理论基础。
[Abstract]:Elevator, cableway and belt transverse vibration problem of common engineering equipment use effect and safety in practical engineering is serious, can the physical model of engineering equipment is simplified as the rope axial shifting system. Therefore, it is necessary to shift the rope axial transverse vibration problem of system research. In this paper, the axial displacement of rope system as the research object, firstly gives a simplified mechanical model of axial shift rope system, establish the system dynamic equation by Hamilton principle. Secondly combined with finite element method, the rope shifting system transverse displacement response and vibration energy of two kinds of calculation methods. Then the vibration period and the vibration type propagation law of wave reflection on the rope system based on and the natural frequency formula of axial shift rope system, comparative analysis of differences in fixed length and variable length of two rope shift of system frequency of tension and axial movement speed The effect of change on the rope shift system natural frequency. Finally, through the installation of damping device in the system boundary, boundary damping control of transverse vibration of the system. The force equilibrium equation and energy equation of the boundary rope shift system based on the study of reflection wave and incident wave amplitude ratio and energy ratio, establish control function, determine the boundary damping coefficient range and damping coefficient of the optimal value, to achieve the purpose of transverse vibration of rope shifting system design and analysis of control. To provide equipment for the axial shifting system engineering theory. The above research rope

【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH113.1

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