多绳摩擦提升系统非线性动力学行为与预应力控制方法研究

为了克服现有矿井缠绕提升荷载小、摩擦提升高度低、交变应力幅度与振动稳定性控制难的问题，适应超深井、重负载、高速度的需要，本项目以多绳摩擦提升系统为研究对象，深入开展非线性动力学行为与预应力控制方法研究。主要包括：建立超深井大载重高速提升运动激励模型，探求其扰动特征；构建大跨度高速运动弦绳的耦合动力学模型，揭示弦绳的非线性动力学特性及其稳定性演化规律；建立冗余约束大尺度强时变并联提升系统耦合动力学模型，揭示并联提升系统非光滑动力学行为；寻求多传感器技术下提升绳、柔性导轨与尾绳等多元协同下的位移幅值小和交变应力水平低的预应力控制方法，形成适用于超深井大载重高速运行环境的多绳摩擦提升系统动力学理论与技术，为超深井大载重高速提升系统的优化设计、健康监测以及安全运行的有效控制提供理论支撑与技术支持。

In order to overcome the problems of small hoisting load in winding hoist, low hoisting height in friction hoist and difficult control of alternating stress amplitude and vibration stability and to meet the need of super-deep mine, heavy load and high speed, the multi-rope friction hoisting system is investigated to study the nonlinear dynamic behavior and control method of prestress. The main contents are as follows: The excitation model for high-speed motion of friction hoisting ropes is established to explore the disturbance characteristics. The coupled vibration model of long-span high-speed moving string rope is constructed to discover the nonlinear vibration response characteristics and its stability evolution rules. The coupled vibration model of large-scale and strong time-varying parallel hoisting system with redundant constraints is established to reveal the non-smooth dynamic behavior of parallel hoisting system. The prestress control method with small displacement amplitude and low alternating stress level under multi-sensor technology is sought. The dynamic theory and technology of multi-rope friction hoisting system is developed which is suitable for super-deep mine, and provides theoretical support and technical support for the optimization design, health monitoring and effective control of safe operation of the heavy-load and high-speed hoisting system in super-deep mine.