基于动力学的立井刚性罐道导向平顺性若干问题研究

发布时间：2018-08-28 08:30

【摘要】：随着采矿业的发展与进步,立井提升系统能否安全和高效地运行越来越受到重视。刚性罐道导向系统的平顺性是限制提升系统性能的主要因素,受到了国内外同行专家的关注。立井提升系统整体结构复杂,各种性能因素耦合交杂,要研究平顺性,必须从影响平顺性的系统整体结构入手,了解其结构特征,对其关键性的因素进行合理地建模与分析。本文以平顺性为出发点,以动力学为研究方法,从以下三方面展开问题：1.以摩擦轮、钢丝绳和提升容器为主要研究内容,建立了垂直振动系统动力学模型,该模型为线性多自由度时变系统模型。并将该模型离散化为一系列瞬时系统进行数值求解,结合某矿井具体工况,代入运动速度曲线方程,对该模型进行瞬态响应分析。并对不同工况、运行到不同位置时振动情况进行横向对比分析。2.对影响平顺性的立井罐道装备的罐道典型故障激励信息进行了分析,将罐道表面质量信息归纳为表面质量、接头处不良和刚度不足等典型特征,并建立了刚性罐道—滚轮罐耳—提升容器的水平动力学模型。将几种影响平顺性较大的典型激励信息代入仿真分析,对其影响程度进行量化比较。3.对平顺性关键部件滚轮罐耳进行优化,从静力学和动力学两方面进行建模。静力学建模得到了其整体刚度的非线性曲线,围绕动刚度和固有频率的问题,建立了二自由度的滚轮罐耳动力学模型,并模拟了反映罐道表面特征的一般随机信号进行仿真,对滚轮罐耳材料和结构进行进一步的优化。通过本文动力学模型和仿真分析,分析了各个因素对立井刚性罐道导向平顺性的影响程度,并对这些因素的防控提供了方法,可为相关的工程设计提供理论依据。
[Abstract]:With the development and progress of mining industry, more and more attention has been paid to the safe and efficient operation of shaft hoisting system. The ride comfort of the rigid tank path guidance system is the main factor that limits the performance of the system, and has attracted the attention of domestic and foreign experts. The whole structure of shaft hoisting system is complicated and various performance factors are coupled. In order to study the ride comfort, we must start with the overall structure of the system that affects the ride comfort, understand its structural characteristics, and model and analyze the key factors reasonably. This paper takes ride comfort as the starting point and dynamics as the research method, and develops the problem: 1 from the following three aspects. Taking friction wheel, wire rope and lifting vessel as the main research contents, a dynamic model of vertical vibration system is established, which is a linear multi-degree-of-freedom time-varying system model. The model is discretized into a series of instantaneous systems and solved numerically, and the transient response of the model is analyzed by incorporating the velocity curve equation into the specific working conditions of a mine. At the same time, the vibration of different working conditions and running to different positions were compared and analyzed. 2. 2. In this paper, the typical fault excitation information of tank track equipment for vertical shaft track is analyzed, and the surface quality information of tank track is summed up as surface quality, bad joint and insufficient stiffness, and so on. The horizontal dynamic model of rigid tank tunnel, roller ear and lifting vessel is established. Several kinds of typical incentive information which affect ride comfort are put into simulation analysis, and the influence degree is compared quantitatively. 3. The key component of ride comfort was optimized, and the statics and dynamics models were established. The nonlinear curve of its overall stiffness is obtained by static modeling. A two-degree-of-freedom dynamic model of roller ear is established around the problems of dynamic stiffness and natural frequency, and the general random signals reflecting the surface characteristics of the tank track are simulated. The material and structure of roller can are further optimized. Based on the dynamic model and simulation analysis in this paper, the influence of various factors on the steering comfort of vertical shaft rigid tank track is analyzed, and the method of preventing and controlling these factors is provided, which can provide the theoretical basis for the related engineering design.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD262.4

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