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关键词： coal mining machinery   damage failure   energy absorption characteristics   impact behavior   Simulation analysis  

摘要： Laser cladding technology plays an important role in impact, friction and corrosion Performances of coal mine machinery components. Mechanical Performances of composite material after laser cladding are crucial for their adaptability to Underground environment of coal mines to determine further promotion of laser cladding technology. Here, to further study Performances of composite material after cladding, a pneumatic horizontal impact experimental device was used to simulate impact environment in coal mines. A composite target plate coated with Fe-based alloy on surface of commonly used material 27SiMn steel Substrate in coal mine machinery was taken as the study object, damage behavior and energy absorption characteristics of the target plate under different impact pressures were analyzed using the combination of finite element Simulation and experimental study method. The results showed that surface damage area, craterdepth, damage morphology and ränge obtained with numerical Simulation have an error of no more than 10% compared to experimental results to verify the correctness of Simulation model;with increase in impact pressure, damage form of target plate gradually evolves from plastic deformation and microcrack initiation to shear failure and complete fracture;laser cladding Fe-based alloy coating can absorb and disperse part of impact energy to effectively reduce impact damage of Substrate material;the study results can provide experimental methods and theoretical analysis basis for studying surface impact damage behavior of coal mining machinery equipment. © 2025 Chinese Vibration Engineering Society. All rights reserved.

摘要： 2025 年 2 月,JAMA 刊 发了 一 篇 文 章《Patients'Trust in Health Systems to Use Artificial Intelligence》,该文章指出人工智能(AI)在医疗保健领域的发展引发了一系列关于患者参与的新问题,而这些问题对于设计值得信赖的AI系统和确保以患者为中心的护理至关重要.