【摘要】：隨著人們對礦產(chǎn)資源的不斷開采，提升系統(tǒng)的提升高度和運行速度都在不斷的提高。由此產(chǎn)生了對提升系統(tǒng)中提升鋼絲繩的安全性和穩(wěn)定性的更高的要求。鑒于此，對提升系統(tǒng)在運動過程中提升鋼絲繩的動態(tài)特性進行深入且詳細的研究已經(jīng)迫在眉睫。 礦井提升系統(tǒng)是一種典型的柔性傳動提升系統(tǒng)，一般由摩擦輪、提升容器/平衡錘、提升鋼絲繩、平衡鋼絲繩等主要部件構成。提升鋼絲繩與提升容器相連，從而引導提升容器的上下運行。由于提升鋼絲繩自身的柔性特性以及復雜的外界干擾條件，因此在提升系統(tǒng)的整個運動過程中，提升鋼絲繩的動態(tài)特性極其復雜。本文采用理論分析與現(xiàn)場真實試驗相結(jié)合的研究方法，對立井提升系統(tǒng)提升鋼絲繩的動態(tài)特性進行了較深入的研究。 根據(jù)礦井提升系統(tǒng)中提升鋼絲繩的柔性特性，將平衡鋼絲繩的時變質(zhì)量等效到提升容器上，忽略其振動產(chǎn)生的影響。基于能量法，利用哈密頓原理，建立柔性提升鋼絲繩縱向-橫向耦合振動的非線性控制微分方程；并使用數(shù)值求解方法——伽遼金法，，對所建立的方程進行求解。理論模型的可靠性與有效性通過現(xiàn)場試驗進行了驗證。 文章以雙激勵條件下的提升鋼絲繩橫向振動模型為基礎，研究了上、下激勵分別、共同作用以及載荷對提升鋼絲繩橫向振動動態(tài)特性的影響。并通過改變外界激勵的頻率，得出外界激勵頻率與提升容器的固有頻率相等時，提升鋼絲繩橫向振動振幅最大，應盡量避免之。接著利用控制變量與仿真的方法，分別研究了提升容器與罐道之間彈簧的剛度系數(shù)k、集中阻尼c、以及存在于整個提升系統(tǒng)的系統(tǒng)阻尼cd對提升鋼絲繩的橫向振動影響。 總體來說，本文對立井提升系統(tǒng)中提升鋼絲繩的動態(tài)特性進行了深入的理論和試驗研究；著重揭示了由于外界干擾激勵以及不同結(jié)構參數(shù)對提升鋼絲繩橫向振動產(chǎn)生的影響。本文的研究成果為柔性提升系統(tǒng)的相關研究提供了分析思路和理論基礎，試圖為更加深入地研究礦井提升系統(tǒng)提升鋼絲繩的安全性提供了途徑與方法。
[Abstract]:With the continuous exploitation of mineral resources, the elevation of the system and the speed of operation are constantly improved. Therefore, higher requirements for the safety and stability of the hoisting rope in the hoisting system are created. In view of this, it is urgent to study the dynamic characteristics of hoisting wire rope in motion. Mine hoisting system is a typical flexible transmission hoisting system, which is generally composed of friction wheel, lifting vessel / balance hammer, hoisting wire rope, balancing wire rope and other main components. The hoisting wire rope is connected to the lifting container to guide the lifting vessel up and down. Because of the flexible characteristics of the hoisting wire rope and the complex external interference conditions, the dynamic characteristics of the hoisting rope are extremely complex during the whole motion process of the hoisting system. In this paper, the dynamic characteristics of hoisting wire rope of shaft hoisting system are studied deeply by combining theoretical analysis with field real test. According to the flexible characteristics of hoisting wire rope in mine hoisting system, the time-varying mass of balanced wire rope is equivalent to the lifting vessel, and the effect of vibration is ignored. Based on energy method and Hamiltonian principle, the nonlinear governing differential equation of longitudinal and transverse coupling vibration of flexible hoisting wire rope is established, and the Galerkin method is used to solve the equation. The reliability and validity of the theoretical model are verified by field tests. Based on the transverse vibration model of hoisting wire rope under the condition of double excitation, the effects of upper and lower excitation, mutual action and load on the dynamic characteristics of transverse vibration of hoisting wire rope are studied in this paper. By changing the frequency of external excitation, it is concluded that when the external excitation frequency is equal to the natural frequency of the lifting vessel, the transverse vibration amplitude of the hoisting wire rope is the largest, which should be avoided as far as possible. Then the effects of spring stiffness coefficient k, concentrated damping c, and system damping cd in the whole hoisting system on the transverse vibration of hoisting wire rope are studied by means of control variables and simulation methods, respectively. In general, the dynamic characteristics of hoisting rope in shaft hoisting system are studied theoretically and experimentally in this paper, and the influence of external disturbance and different structural parameters on the transverse vibration of hoisting wire rope is emphasized. The research results in this paper provide an analytical idea and theoretical basis for the research of flexible hoisting system, and try to provide a way and method for further research on the safety of hoisting wire rope in mine hoisting system.
【學位授予單位】：太原理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD532

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