Digging characteristics of grab based on DEM-MBD simulation and experiment

IF 2.8 3区工程技术 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS Computational Particle Mechanics Pub Date : 2024-10-01 DOI:10.1007/s40571-024-00823-x

Fangping Ye, Tianye Lu, Chang Xu

{"title":"Digging characteristics of grab based on DEM-MBD simulation and experiment","authors":"Fangping Ye, Tianye Lu, Chang Xu","doi":"10.1007/s40571-024-00823-x","DOIUrl":null,"url":null,"abstract":"<div><p>The grab bucket plays an important role in the construction process of dredging, and analyzing the excavation characteristics of the grab is helpful for the mechanical design of the grab bucket. In this investigation, the digging device and the digging mudstone are detailed as a system dynamic process, and a theoretical model for calculating digging resistance is established based on the Rankine theory. Furthermore, the particle shear test is performed to analyze the influence of changes in sand physical parameters on its shear characteristics. The DEM-MBD coupling simulation is adopted to calculate the particle distribution and the digging trajectory, and the influence of digging depth and particle cohesion strength is analyzed on the digging resistance. Moreover, an excavator digging experimental platform is established to validate the feasibility of the experimental results. The results show that the 10% moisture content is the inflection point of the sand particles physical and mechanical properties, and its shear strength decreases with the augment of moisture content; the variation law of the simulation results is consistent with the theoretical calculation, and the digging resistance reduction is proportional to the cohesion strength when the particles are completely sheared; the same key point parameter error of the digging curve obtained by the test and the simulation are consistent.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 1","pages":"573 - 584"},"PeriodicalIF":2.8000,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computational Particle Mechanics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s40571-024-00823-x","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATHEMATICS, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}

引用次数: 0

Abstract

The grab bucket plays an important role in the construction process of dredging, and analyzing the excavation characteristics of the grab is helpful for the mechanical design of the grab bucket. In this investigation, the digging device and the digging mudstone are detailed as a system dynamic process, and a theoretical model for calculating digging resistance is established based on the Rankine theory. Furthermore, the particle shear test is performed to analyze the influence of changes in sand physical parameters on its shear characteristics. The DEM-MBD coupling simulation is adopted to calculate the particle distribution and the digging trajectory, and the influence of digging depth and particle cohesion strength is analyzed on the digging resistance. Moreover, an excavator digging experimental platform is established to validate the feasibility of the experimental results. The results show that the 10% moisture content is the inflection point of the sand particles physical and mechanical properties, and its shear strength decreases with the augment of moisture content; the variation law of the simulation results is consistent with the theoretical calculation, and the digging resistance reduction is proportional to the cohesion strength when the particles are completely sheared; the same key point parameter error of the digging curve obtained by the test and the simulation are consistent.

Abstract Image

查看原文

微信好友朋友圈 QQ好友复制链接

本刊更多论文

基于DEM-MBD的抓斗挖掘特性仿真与实验

抓斗在疏浚施工过程中起着重要的作用，分析抓斗的开挖特性有助于抓斗的机械设计。本研究将挖掘装置与泥岩的挖掘作为一个系统的动态过程，并基于朗肯理论建立了计算挖掘阻力的理论模型。在此基础上，进行了颗粒剪切试验，分析了砂体物性参数变化对其剪切特性的影响。采用DEM-MBD耦合仿真计算了颗粒分布和掘进轨迹，分析了掘进深度和颗粒内聚强度对掘进阻力的影响。建立了挖掘机挖掘实验平台，验证了实验结果的可行性。结果表明：10%含水率是砂粒物理力学性能的拐点，其抗剪强度随含水率的增大而减小；模拟结果的变化规律与理论计算一致，当颗粒完全剪切时，挖掘阻力减小与内聚力强度成正比；试验所得的开挖曲线同一关键点参数误差与模拟结果一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文去求助

来源期刊

Computational Particle Mechanics Mathematics-Computational Mathematics

CiteScore

5.70

自引率

9.10%

发文量

期刊介绍： GENERAL OBJECTIVES: Computational Particle Mechanics (CPM) is a quarterly journal with the goal of publishing full-length original articles addressing the modeling and simulation of systems involving particles and particle methods. The goal is to enhance communication among researchers in the applied sciences who use "particles'''' in one form or another in their research. SPECIFIC OBJECTIVES: Particle-based materials and numerical methods have become wide-spread in the natural and applied sciences, engineering, biology. The term "particle methods/mechanics'''' has now come to imply several different things to researchers in the 21st century, including: (a) Particles as a physical unit in granular media, particulate ﬂows, plasmas, swarms, etc., (b) Particles representing material phases in continua at the meso-, micro-and nano-scale and (c) Particles as a discretization unit in continua and discontinua in numerical methods such as Discrete Element Methods (DEM), Particle Finite Element Methods (PFEM), Molecular Dynamics (MD), and Smoothed Particle Hydrodynamics (SPH), to name a few.