复杂载荷作用下大型采煤机细观尺度的微损伤机理与保障理论集成设计优化研究

Combining 3D damage tolerance theory, micromechanics theory and modern signal processing theory, under the action of multi-physics field coupling, study the damage mechanism, the mechanical behavior of friction and wear, the evolution of damage propagation, the detection and the feature extraction mechanism of weak damage signal on the microscopic scale, consequently, a damage failure prediction assessment model and a life assessment system will be established; meanwhile, put forward a practical theory and mean of the online detection and diagnosis for ensuring a complex mining machinery system safe running under a random ambient excitation. Under the action of multi-field coupling, the multidisciplinary and multi-objective integrated optimization designs will be researched for it to solve difficult problems of revealing the micro-damage mechanism of shearers structure system running at high-speed and heavy load state under a random impact incentive multi-field coupling environment; a design theoretical framework and a design criteria will be given, consequently, which fully guarantees the running of the system long-period、reliable and efficient to prevent major catastrophic accidents and provides a new method for the intelligent detection, diagnosis, prediction and intelligent design and control of a complex mining machinery.

将三维损伤容限理论、细观力学理论与现代信号处理新理论有机地结合起来，研究多物理场耦合作用下细观尺度上的损伤发生机理、摩擦磨损力学行为、损伤扩展演化规律、检测与微弱损伤信号的特征提取机理，从而建立损伤失效预测评估模型和寿命评定体系，提出一种实用的随机环境激励下复杂矿山机械系统运行的在线检测与诊断的保障理论方法，并对其进行多场耦合作用下多学科多目标的集成优化设计，解决随机环境冲击激励多场耦合下高速重载运行采煤机系统多微损伤机理难以揭示的难题，给出设计准则和设计的理论框架体系，从而充分保证系统真正意义上的可靠安全高效长周期运行，防止重大灾难性事故的发生，为复杂矿山机械系统的智能检测、诊断预报和智能设计与控制提供一种新方法。

将三维损伤容限理论与现代信号处理新理论有机的结合起来，研究多物理场耦合作用下的损伤发生机理、摩擦损伤力学行为、损伤拓展演化规律、检测与微弱损伤信号的特征提取机理，从而建立损伤失效预测评估模型和寿命评定体系，提出一种实用的随机环境激励下复杂机械系统运行的在线检测与诊断的保障理论方法，并对其进行多场耦合作用下高速重载运行采煤机系统多维损伤难以揭示的难题，给出设计准则和设计的理论框架体系，从而充分保证系统真正意义上的可靠安全高效长周期运行，防止重大灾难性事故的发生，为复杂矿山机械系统的智能检测、诊断报告和智能设计与控制提供一种新方法。