Abstract
Based on the structural characteristic and superior performance of traveling on sand of ostrich foot, explored the special role of the ostrich plantar morphology in the process of traveling on sand. Measured the three-dimensional (3D) point cloud of ostrich plantar surface using 3D laser scanner, and then the 3D irregular surface topography of ostrich foot was acquired using Reverse Engineering (RE) software Geomagic Studio. Extracted camber line of plantar surface of the 3rd toe using software CATIA, carried out optimization and fitting on the characteristic curve, and stretched along width direction of the wheel, then obtained the bionic constitutional unit of bionic wheel traveling on sand, distributed the constitutional unit on the wheel facing evenly. Established the wheel-soil contact model using Discrete element method (DEM) software PFC3D, then performed numerical simulation on the wheel in the sand-striding process. Results show the bionic wheel has exce llent anti-subsidence and sand-fixing properties, and effectively improved the traction force and bearing capacity.
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