摘要
为揭示深海采矿水力输运过程中粗颗粒的冲击破碎机理及规律,实现输运参数优化,本文通过Python程序对颗粒进行随机几何数值重构,开展了颗粒冲击破碎全过程仿真。利用校准后的数值模型研究了撞击速度、角度、粒径对颗粒破碎的影响,确定了典型的颗粒破碎形貌和质量损失率。研究表明:基于I型断裂能的脆性开裂模型可以较准确地模拟颗粒冲击破碎过程,且撞击速度占主要影响,入射角度越大颗粒越容易破碎,细颗粒不易发生破碎,大粒径在低速下也可能产生明显破碎。
In order to reveal the collision-induced fragmentation mechanism and laws of coarse particles during deep-sea mining hydraulic transport and optimize transport parameters,random geometric numerical reconstruction of coarse particles using a Python program was performed in this study,followed by full process simulation of particle collision-induced fragmentation.The validated numerical model was used to investigate the effects of particle impact velocity,impact angle,and particle size on fragmentation,and the typical fracture morphologies and mass loss rates was determined.Simulation results show that:the brittle cracking model based on Mode I fracture energy accurately simulates particle collision-induced fragmentation;particle fragmentation is primarily influenced by impact velocity;particles are more prone to fragmentation at higher incidence angles;fine particles are less likely to fragment,while larger particles may fragment even at low impact velocities.
作者
王华昆
刘方舟
陈贺扬
高婧
余杨
WANG Huakun;LIU Fangzhou;CHEN Heyang;GAO Jing;YU Yang(College of Architecture and Civil Engineering,Xiamen University,Xiamen 361005,Fujian,China;Fujian Key Laboratory of Digital Simulations for Coastal Civil Engineering,Xiamen University,Xiamen 361005,Fujian,China;Hangzhou Aerospace Electronic Technology Company Limited,Hangzhou 311100,China;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China)
出处
《力学与实践》
2025年第3期597-606,共10页
Mechanics in Engineering
基金
国家自然科学基金青年项目(52301339)
福建省自然科学基金青年创新基金项目(2021J05004)
天津大学水利工程智能建设与运维全国重点实验室开放基金(No.HESS-2402)
中央高校基本科研业务费专项资金(20720240038)资助。
关键词
粗颗粒
冲击破碎
随机反弹
数值仿真
深海采矿
coarse particles
impact crushing
random rebound
numerical simulation
deep-sea mining
作者简介
通讯作者:王华昆,博士,副教授,研究方向为深海采矿,海洋结构完整性评估及多场耦合仿真。E-mail:hkwang@xmu.edu.cn。
