吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (2): 508-515.doi: 10.13229/j.cnki.jdxbgxb201502026

• 论文 • 上一篇    下一篇

鸵鸟二趾足底曲面固沙限流特性数值模拟

张锐1，杨明明1，刘海宝1，曾桂银1，潘润铎2，李建桥1   

  1. 1.吉林大学 工程仿生教育部重点实验室，长春 130022；
    2.吉林大学第一医院 放射线科，长春 130021
  • 收稿日期:2013-12-20 出版日期:2015-04-01 发布日期:2015-04-01
  • 作者简介:张锐(1975)，男，教授，博士.研究方向:松软地面仿生行走及数值计算.E-mail:zhangrui@jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目(51275199)；吉林省科技发展计划项目(20140101074JC)；吉林大学工程仿生教育部重点实验室开放基金项目(K201412)；2014年吉林大学“挑战杯”大学生课外学术科技作品竞赛项目(450060507042).

Numerical simulation of sand flow fixation characteristics of plantar surface of ostrich didactyl foot

ZHANG Rui1, YANG Ming-ming1, LIU Hai-bao1, ZENG Gui-yin1, PAN Run-duo2, LI Jian-qiao1   

  1. 1.Key Laboratory of Bionic Engineering, Ministry of Education, Jilin University, Changchun 130022,China;
    2.Department of Radiology, the First Hospital, Jilin University, Changchun 130021,China
  • Received:2013-12-20 Online:2015-04-01 Published:2015-04-01

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摘要： 采用逆向工程技术，完成了鸵鸟足底曲面三维重构和分区，基于离散元法和有限元法，进行了鸵鸟足底曲面/沙土相互作用数值模拟。鸵鸟足底曲面下沙土颗粒流动程度沿足宽方向大于沿足长方向，表明鸵鸟足底曲面形貌更好地减缓了鸵鸟足在沙地上的前行滑移程度。在鸵鸟足多曲面结合形貌中，第Ⅲ趾底中间凹槽面固沙限流效果最好，此区域的沙土颗粒群受力呈现网格状稳态紧固分布。鸵鸟足第Ⅲ趾底中间凹槽面数学模型的建立，为鸵鸟足底曲面仿生设计提供了重要理论依据。

关键词: 工程仿生学, 鸵鸟二趾足, 足底曲面形貌, 固沙限流, 数值模拟

Abstract: 3D model reconstruction and partition of the plantar surface of ostrich didactyl foot were achieved using reverse engineering. Discrete element method and finite element method were employed to simulate the interactions between the plantar surface of ostrich didactyl foot and sand. It was shown that the flowing extent of sand particles under the plantar surface along the foot breadth direction was greater than that along the foot length direction. This may indicate that the plantar surface morphology of ostrich foot can preferably retard the slippage during ostrich foot moving ahead on sand. Within the plantar surface of ostrich foot, the middle groove in the third toe plantar surface has most obvious effect of sand flow fixation, under which the forces on the sand particle groups present the grid-patterned stable tight distribution. A mathematical model of the middle groove in the third toe plantar surface was established, which may provide theoretical reference for bionic design of the plantar surface of ostrich foot.

Key words: bionic engineering, didactyl foot of ostrich, plantar surface morphology, sand flow fixation, numerical simulation

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