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首页> 外文期刊>Journal of terramechanics >Experimental study on wheel-soil interaction mechanics using in-wheel sensor and particle image velocimetry part Ⅱ. Analysis and modeling of shear stress of lightweight wheeled vehicle
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Experimental study on wheel-soil interaction mechanics using in-wheel sensor and particle image velocimetry part Ⅱ. Analysis and modeling of shear stress of lightweight wheeled vehicle

机译:轮 - 土相互作用机械的实验研究与颗粒图像速度部分Ⅱ系Ⅱ。轻型轮车剪切应力的分析与建模

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摘要

Wheeled vehicle mobility on loose sand is highly subject to shear deformation of sand around the wheel because the shear stress generates traction force of the wheel. The main contribution of this paper is to improve a shear stress model for a lightweight wheeled vehicle on dry sand. This work exploits two experimental approaches, an in-wheel sensor and a particle image velocimetry that precisely measure the shear stress and shear deformation generated at the interaction boundary. Further, the paper improves a shear stress model. The model proposed in this paper considers a force chain generated inside the granular media, boundary friction between the wheel surface and sand, and velocity dependency of the friction. The proposed model is experimentally validated, and its usefulness is confirmed through numerical simulation of the wheel traction force. The simulation result confirmed that the proposed model calculated the traction force with an accuracy about 70%, whereas the conventional one overestimated the force, and its accuracy was 13% at the best. (C) 2020 ISTVS. Published by Elsevier Ltd. All rights reserved.
机译:松散沙子上的轮式车辆移动性高度受到轮子周围的砂岩的变形,因为剪切应力产生车轮的牵引力。本文的主要贡献是改善干砂上轻量级轮车的剪切应力模型。这项工作利用了两种实验方法,轮内传感器和粒子图像速度,精确地测量相互作用边界处产生的剪切应力和剪切变形。此外,本文改善了剪切应力模型。本文提出的模型考虑了在粒状介质内产生的力链,车轮表面和沙子之间的边界摩擦,以及摩擦的速度依赖性。所提出的模型是通过实验验证的,通过车轮牵引力的数值模拟来确认其有用性。仿真结果证实,所提出的模型计算牵引力,精度约为70%,而传统的一个高估力,其精度最佳为13%。 (c)2020 ISTV。 elsevier有限公司出版。保留所有权利。

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