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信鴿表面形貌的分形特性
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    摘要:

    分析了信鴿表面形貌的非光滑特性，并利用激光三維掃描控制系統(tǒng)獲取了信鴿背部、胸部及翅膀表面的三維信息，基于分形理論對(duì)其表面進(jìn)行了研究，采用計(jì)盒維數(shù)方法計(jì)算出了信鴿的背部、胸部及翅膀表面面維數(shù)和線維數(shù)，并分析了其分布。結(jié)果表明，信鴿的背部、胸部及翅膀表面均呈現(xiàn)分形特征,面維數(shù)范圍為：2.8988～2.9788，線維數(shù)的范圍為：1.0002～1.0247，信鴿表面形貌的分形特性研究為定量分析信鴿表面在空氣介質(zhì)中的減阻機(jī)理提供了基礎(chǔ)信息。

    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 2.8988 and 2.9788, and the range of liner dimension of these three parts is between 1.0002 and 1.0247. 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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張春華,李建橋,周長(zhǎng)海.信鴿表面形貌的分形特性[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2007,38(7):164-167.[J]. Transactions of the Chinese Society for Agricultural Machinery,2007,38(7):164-167.

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