目的 解决钛合金材料固体颗粒磨损问题。方法 采用显式动力学有限元分析手段，结合Johnson-cook材料模型和应变累积失效模型，对多颗粒连续冲击Ti-6Al-4V钛合金靶材的冲蚀特性和能量转化特性进行数值模拟。结果 在颗粒以倾斜角度连续冲击靶材时，最大冲蚀应力呈现一定波动性。当颗粒在法向连续冲击时，靶材会快速进入稳定冲蚀阶段。在不同入射角度下，多颗粒连续冲击靶材的最大应力均位于靶材产生材料堆积的位置。在入射角90°和入射速度130 m/s下，当颗粒尺寸从50 μm增至150 μm时，最大冲击坑深度从3.124 μm增至8.997 μm。当颗粒尺寸超过100 μm后，由于加工硬化机制的影响，后续颗粒冲击产生的应力比第1次冲击产生的应力降低了30%~60%。在冲角为30°下，当摩擦因数从0增至0.2时，颗粒动能损失增大了22.69%。随着入射角度的增加，摩擦因数对颗粒动能损失的影响逐渐减弱。结论 从微观机制上解释了入射角度和颗粒粒径对多颗粒连续冲蚀行为的影响，明确了摩擦因数对颗粒冲蚀过程中能量转化特性的影响。

Aiming at the problem of solid particle erosion of titanium alloy materials, the nonlinear dynamic numerical simulation based on the finite element method is an important tool to study the high temperature erosion and failure mechanism of materials, which can effectively make up for the lack of detailed description in erosion experiments. In this paper, a systematical numerical simulation study on the erosion characteristics and energy conversion characteristics of multi-particle impact on Ti-6Al-4V titanium alloy target material was performed with the help of explicit dynamic finite element analysis, the Johnson-cook material model and the strain accumulation failure criterion model. Before calculation, the maximum Mises stress and the maximum indentation depth were used as the evaluation indicators, and a grid independence verification of the calculation model was carried out to determine the number of grids and the minimum grid size of the calculation model. After that, the effectiveness of the numerical method adopted in this paper was verified by comparing with the calculation results of the Hertzian elasticity theory, and the error between theoretical calculation and numerical simulation under different working conditions was less than 8.4%.