| 信鸽表面形貌的分形特性 |
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| 引用本文： | 张春华,李建桥,周长海.信鸽表面形貌的分形特性[J].农业机械学报,2007,38(7):164-167. |
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| 作者姓名： | 张春华 李建桥 周长海 |
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| 作者单位： | 1. 吉林大学地面机械仿生技术教育部重点实验室,130025,长春市
2. 吉林大学生物与农业工程学院 |
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| 基金项目： | 国家自然科学基金;国家高技术研究发展计划(863计划) |
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| 摘 要： | 分析了信鸽表面形貌的非光滑特性,并利用激光三维扫描控制系统获取了信鸽背部、胸部及翅膀表面的三维信息,基于分形理论对其表面进行了研究,采用计盒维数方法计算出了信鸽的背部、胸部及翅膀表面面维数和线维数,并分析了其分布。结果表明,信鸽的背部、胸部及翅膀表面均呈现分形特征,面维数范围为:2.8988～2.9788,线维数的范围为:1.0002～1.0247,信鸽表面形貌的分形特性研究为定量分析信鸽表面在空气介质中的减阻机理提供了基础信息。
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| 关 键 词： | 表面形貌 分形几何 非光滑 耦合 |
| 修稿时间： | 2006-12-18 |
Study on Fractal Character of Pigeon Surface Morphology |
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| Zhang Chunhua,Li Jianqiao,Zhou Changhai.Study on Fractal Character of Pigeon Surface Morphology[J].Transactions of the Chinese Society of Agricultural Machinery,2007,38(7):164-167. |
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| Authors: | Zhang Chunhua Li Jianqiao Zhou Changhai |
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| Institution: | Jilin University |
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| Abstract: | The non-smooth morphology of pigeon surface was analyzed.The three dimensions information of the surface of pigeon's back,breast and wing were obtained using 3D scanner laser system.The surface was analyzed based on fractal geometry.The surface dimension and linear dimension were calculated using box-counting method,and their distributions were analyzed.It showed that the surface of back,breast and wing all display fractal feature.The range of surface dimension is between 2.898 8 and 2.978 8,and the range of liner dimension of these three parts is between 1.000 2 and 1.024 7.The study can provide the basis information for further quantitative analyzing the drag reduction mechanism of the surface of pigeon in the air. |
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| Keywords: | Surface morphology Fractal geometry Non-smooth Coupling |
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