滑动电弧对轨道的烧蚀严重影响了直线推进机构的准确度和耐久度，在多场耦合和极端冲击条件下滑弧对铜合金的烧蚀机理和破坏作用将更为复杂，因此研究滑弧烧蚀的微观破坏机制并发展相应的改进防护措施对于保障直线推进机构的安全可靠运行具有重要意义。本项目基于宏观实验研究和微观仿真模拟，探索滑弧对铜合金材料微观组织结构及力电特性的影响规律，揭示上述条件下铜合金材料服役失效的累积效应机制，在此基础上建立多物理场—烧蚀特征参量—服役性能的寿命评估方法；采用微观分子反应动力学模拟的方法建立铜合金材料滑弧烧蚀动力学过程的跨尺度模拟，在此模型基础上进行掺杂石墨烯耐烧蚀铜合金材料的改性优化，测试改性后的铜合金材料性能并反馈指导铜合金掺杂设计，形成可推广应用的耐烧蚀防护技术。上述研究可深化现有金属材料烧蚀损伤理论，同时也可为金属材料烧蚀程度的准确评估和防护技术提供必备的理论基础和技术支撑，具有突出的科学意义和应用价值。

The ablation of sliding arc on the track has seriously affected the accuracy and durability of the linear propulsion mechanism. Under the multi-field coupling and extreme surge conditions, the ablation mechanism and damage effect of the sliding arc on the copper alloy will be more complicated. The microscopic damage mechanism of corrosion and the development of corresponding improved protective measures are of great significance to ensure the safe and reliable operation of linear propulsion structures. This project is based on macro-experimental research and micro-simulation to explore the influence of sliding arc on the microstructure and electromechanical properties of copper alloy materials, then revealing the cumulative effect mechanism of copper alloy material service failure under the above conditions, and establishing multi physics-field ablation characteristic parameter-service performance life evaluation method. The micro-molecular dynamics simulation method is used to establish a cross-scale simulation of the sliding arc ablation dynamics of copper alloy materials. On the basis of this model, the modification and optimization of doped graphene ablation-resistant copper alloy materials are carried out. The properties of the modified copper alloy materials are tested, and the copper alloy doping design is given feedback to guide the design of ablation-resistant protection technologies that can be promoted and applied. The above-mentioned research can deepen the existing theory of metal material ablation damage, as well as providing necessary theoretical foundation and technical support for the accurate assessment of metal material ablation degree and protection technology, which has outstanding scientific significance and application value.