基于离散元的铣挖破礁施工参数研究  

Construction parameters of milling reef based on discrete element method

作　　者：汤德颖 阿比尔的 裴邦学 李春军 刘明维[1] 杜健如 TANG Deying;ABI Erdi;PEI Bangxue;LI Chunjun;LIU Mingwei;DU Jianru(College of River and Ocean,Chongqing Jiaotong University,Chongqing 400074,China;Changjiang Chongqing Waterway Engineering Bureau,Chongqing 400010,China)

机构地区：[1]重庆交通大学河海学院,重庆400074 [2]长江重庆航道工程局,重庆400010

出　　处：《水运工程》2023年第8期197-203,共7页Port & Waterway Engineering

基　　金：长江重庆航道工程局科技项目(cqjt-2021-202)。

摘　　要：为解决生态清礁的迫切需求,铣挖法作为机械开挖岩石的方法被用于水下清礁。本文根据铣挖清礁的现场试验资料,基于离散元3DEC模拟铣挖清礁的过程,研究不同施工参数(输出扭矩、工作压力、吃刀深度、摆臂速度)的破礁规律。模拟结果表明:输出扭矩和工作压力对铣挖头的运转情况影响显著,过大的工作压力导致铣挖头出现卡刀现象;铣挖头卡刀会增加截割阻力影响截齿寿命;铣挖头正常运行的比能耗随工作压力的增大而减小。摆臂铣削的截割阻力和铣挖效率均随吃刀深度和摆臂速度增大而增大;比能耗随吃刀深度的增大而减小,与摆臂速度呈指数减小的趋势。研究成果对铣挖破礁实际施工具有重要参考意义。Regarding the urgent need of ecological reef clearing,milling method as a mechanical rock excavation method is used in underwater reef clearing.According to the field test data of milling and clearing the reef,based on the discrete element 3DEC simulation of the process of milling and clearing the reef,this paper studies the reef breaking law of different construction parameters(output torque,working pressure,knife depth,swing arm velocity).The simulation results show that the output torque and working pressure have significant influence on the operation of milling head,the over-high working pressure leads to the clamping phenomenon of the milling head.Milling head stuck tool will increase cutting resistance and affect the life of the cutter.The specific energy consumption of normal operation of milling head decreases with the increase of output torque and working pressure.The cutting resistance and milling efficiency both increase with the increase of cutting depth and swing arm velocity.The specific energy consumption of reef milling decreases with the increase of the cutting depth and has an exponential decreasing relationship with the swing arm velocity.The research results have important reference significance for the actual construction of milling and breaking reef.

关 键 词：生态清礁 铣挖施工参数 截割阻力 铣挖效率 比能耗 

分 类 号：U616.2[交通运输工程—船舶及航道工程]