沙地刚性轮构型仿生设计及牵引性能数值分析

为了提高车轮牵引性能,改善车辆在松散沙土介质环境的通过能力,该文以善于沙地奔跑的鸵鸟足部关键部位—足趾甲为仿生原型,通过仿生优化轮刺结构,设计出具有高牵引性能的仿生轮刺式沙地刚性轮,并以一种模拟月壤作为试验松散沙土介质材料,采用离散元软件PFC2D？的内置语言FISH和相关命令,建立了适用于非规则结构刚性轮的轮壤相互作用动态模拟系统,并获得试验验证。通过仿生轮刺式刚性轮与模拟月壤相互作用离散元模拟,并与矩形轮刺式刚性轮模拟结果对照,从轮下模拟月壤颗粒细观运动、接触力场、速度场以及车轮挂钩牵引力角度,验证了仿生轮刺式刚性轮具有优越的牵引性能,在车轮滑转率50%的稳定运行状态下,仿生轮刺式刚性轮的...

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Bibliographic Details
Published in农业工程学报 Vol. 31; no. 3; pp. 122 - 128
Main Author 张锐 罗刚 薛书亮 杨明明 刘芳 张四华 潘润铎 李建桥
Format Journal Article
LanguageChinese
Published 吉林大学工程仿生教育部重点实验室,长春,130022%青岛征和工业有限公司,青岛,266705%中国电子科技集团第二十八研究所,南京,210007%吉林大学第一医院放射线科,长春,130021 2015
Subjects
仿生学
数值分析
沙地刚性轮
牵引性能
离散元模拟
车辆
鸵鸟足趾甲
离散元模拟
数值分析
vehicles
bionics
ostrich foot toenail
牵引性能
鸵鸟足趾甲
车辆
仿生学
沙地刚性轮
traction performance
numerical analysis
DEM simulation
rigid wheel moving on sand
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ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2015.03.017

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Summary:为了提高车轮牵引性能,改善车辆在松散沙土介质环境的通过能力,该文以善于沙地奔跑的鸵鸟足部关键部位—足趾甲为仿生原型,通过仿生优化轮刺结构,设计出具有高牵引性能的仿生轮刺式沙地刚性轮,并以一种模拟月壤作为试验松散沙土介质材料,采用离散元软件PFC2D？的内置语言FISH和相关命令,建立了适用于非规则结构刚性轮的轮壤相互作用动态模拟系统,并获得试验验证。通过仿生轮刺式刚性轮与模拟月壤相互作用离散元模拟,并与矩形轮刺式刚性轮模拟结果对照,从轮下模拟月壤颗粒细观运动、接触力场、速度场以及车轮挂钩牵引力角度,验证了仿生轮刺式刚性轮具有优越的牵引性能,在车轮滑转率50%的稳定运行状态下,仿生轮刺式刚性轮的牵引性能可提高5.2%左右。该研究为提高刚性轮在松散沙土介质环境中的牵引性能提供了全新设计和研究手段。
Bibliography:11-2047/S
vehicles; bionics; numerical analysis; rigid wheel moving on sand; ostrich foot toenail; traction performance; DEM simulation
It is very important to enhance the wheel traction performance for improving the traveling ability of the vehicle in the loose sand circumstance. The toenail, which is the key part of ostrich foot possessing the excellent running ability on sand, was regarded as the bionic prototype. Through bionic optimization of the wheel lug structure, the rigid wheel with bionic wheel lugs moving on sand with higher traction performance was designed. A kind of lunar soil simulants was selected as the experimental loose sand material. Using the built-in language FISH and the relevant command of Discrete Element Method（DEM） software PFC2D？, the dynamic simulation system, which was suitable for simulating the interactions between the rigid wheel with irregular structure and the loose sand material, was established. The simulation system was validated by the combination between laboratory test
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2015.03.017