• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

机械工程学报 ›› 2016, Vol. 52 ›› Issue (15): 192-203.doi: 10.3901/JME.2016.15.192

• 制造工艺与装备 • 上一篇    下一篇

基于离散元的模拟月岩切削负载特性数值模拟及试验验证*

唐德威, 李鹏, 姜生元, 全齐全, 侯绪研, 邓宗全   

  1. 哈尔滨工业大学机电工程学院 哈尔滨 150001
  • 出版日期:2016-08-05 发布日期:2016-08-05
  • 作者简介:

    唐德威，男，1966年出生，博士，教授，博士研究生导师。主要研究方向为月面无人自动采样技术。

    E-mail：dwtang@hit.edu.cn

    姜生元(通信作者)，男，1969年出生，博士，教授，博士研究生导师。主要研究方向为地外天体无人自动采样探测技术。

    E-mail：jiangshy@hit.edu.cn

  • 基金资助:
    * 探月三期预先研究专项资助项目(TY3Q20110005); 20150826收到初稿，20160117收到修改稿;

Numerical Simulation of Lunar Rock Simulant Cutting Load Based on Discrete Element Modeling and Experimental Validation

TANG Dewei, LI Peng, JIANG Shengyuan, QUAN Qiquan, HOU Xuyan, DENG Zongquan   

  1. School of Mechatronics Engineering， Harbin Institute of Technology， Harbin 150001
  • Online:2016-08-05 Published:2016-08-05

PDF

420

摘要：

钻取采样是人类获取月球岩石类样品的重要手段，钻进负载的稳定性是确保月岩采样任务成功的关键因素。由于岩石属性直接决定其可钻性等级，并影响钻进负载，有必要在地面环境中，分析岩石本构模型与钻进负载之间的关系，构建不同可钻性等级的岩石样本模型，开展模拟钻进试验，获知不同钻进参数下岩石采样的钻进载荷变化情况。据此，将地面条件下大理岩样本选作模拟月岩切削特性的研究对象，基于二维颗粒流程序(Particle flow code 2 dimensions， PFC2D)，建立小切削深度下仿真分析模型。利用Plackett-Burman试验(PB试验)和中心组合设计(Central composite design， CCD)方法，确定影响岩石切削特性的微观参数，开展不同切削深度下的模拟月岩切削负载试验验证。经仿真分析与试验验证能得到与岩石切削特性相对应的离散元模型，试验结果表明该仿真模型在较小切削深度条件下的切削负载变化规律与实际情况一致。通过研究获得了一种建立模拟月岩离散元切削模型的建模方法，为后续分析钻头/切削刃构型参数对钻进/切削负载的影响提供了研究条件。

关键词: PFC参数, 切削特性, 试验设计, 模拟月岩

Abstract:

：Drilling is an important method which has always been used to acquire lunar rock samples. The stability of drilling load is considered as a key factor for sampling mission. Drilling load is mainly affected by rock drillability which is determined by the rock properties. To acquire drilling load variations, relations among drilling load, drilling parameters and rock properties ought to be analysed by drilling tests in laboratory. Therefor, the marble has been selected as lunar rock simulant based on drillability test. A lunar rock simulant cutting model based on particle flow code 2 dimensions (PFC2D) has been established aiming at acquiring rock cutting force with small cutting depth during drilling process. The microparameters of PFC2D model have been determined by Plackett-Burman (PB) design and central composite design (CCD) method. The consistent trend between the simulation and test with different small cutting depths is obtained after the cutting simulations and validation tests. A method for establishing discrete element cutting model of lunar rock simulant can be acquired through the research. It provides the basis for analysing the relations between drill bit configurations and drilling load.

Key words: cutting characteristics, experiment design, PFC microparameters, lunar rock simulant

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