Abstract:Ultrasonic shot peening is an important surface strengthening technology for improving the fatigue performance of complex structural parts with high added value. The impact position distribution and impact velocity of the projectile on the workpiece surface are important factors affecting the strengthening effect of ultrasonic shot peening. However, the conventional experimental measurement method has great technical difficulty and high trial and error cost. In order to reduce the cost, the use of numerical simulation method to study the impact [ 基金项目：国家自然科学基金（52305328）；北京市教委科技一般项目（KM202210009009）；北方工业大学毓杰团队人才培养 计划项目（XN212/009） ]dynamics of the projectile in the process of ultrasonic shot peening has become one of the research hotspots. In this paper, the multi-body dynamics software ADAMS and the discrete element software EDEM [ 基金项目：国家自然科学基金（52305328）；北京市教委科技一般项目（KM202210009009）；北方工业大学毓杰团队人才培养 计划项目（XN212/009）]are respectively used to establish the three-dimensional simulation model of ultrasonic shot peening, and the impact dynamics data such as the impact position, impact velocity and impact angle are calculated and obtained. The accuracy and calculation efficiency of the two methods are compared, and the numerical simulation effect of the two methods is analyzed. The results show that both methods can be used for the simulation study of the impact dynamics of the projectile in the process of ultrasonic shot peening. When the number of projectiles is small (such as 20), the calculation results of the two methods are in good agreement, but the simulation efficiency of ADAMS is about 2 times that of EDEM. When the number of projectiles is large (such as 50), the calculation results of EDEM are more accurate, and the calculation efficiency is 5.7 times higher than that of ADAMS.

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