滚动阻力修正

IF 0.9 Q4 ENGINEERING, MECHANICAL
Yi Li, R. West
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引用次数: 14

摘要

滚动阻力定义为每单位距离的能量损失,被轮胎科学界广泛接受。人们普遍认为,能量损失到热量中的主要部分是由自由滚动轮胎的橡胶化合物的粘弹性引起的。为了计算转化为热量的滚动损失(滞后损失),已经开发了一种基于轮胎力和力矩的方法,以简化实验室或现场所需的测量。本文指出,通过这种方法,获得的能量损失并没有完全转化为热量,因为消耗的功率的一部分用于补偿机械功。此外,基于轮胎力和力矩的实验方法无法分离出这部分动力。长期以来,研究人员和工程师一直错误地忽略了这一点。通过对刚性、纯弹性和粘弹性滚动体的比较分析证明了这一发现。这项研究从数学上证明,从轮胎力和力矩及其相关速度的角度来看,转化为热量的滚动损失是不可解决的。进一步运用自由滚动轮胎的有限元模型来证明这一概念。这些发现促使人们从能源的角度重新审视滚动阻力。此外,还提出了滚动阻力的扩展定义,并与传统的阻力定义向后兼容。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Rolling Resistance Revisited
Rolling resistance defined as energy loss per unit distance is well accepted by the tire science community. It is commonly believed that the dominant part of energy loss into heat is caused by the viscoelasticity of rubber compounds for a free-rolling tire. To calculate the rolling loss (hysteretic loss) into heat, a method based on tire forces and moments has been developed to ease required measurements in a lab or field. This paper points out that, by this method, the obtained energy loss is not entirely converted into heat because a portion of the consumed power is used to compensate mechanical work. Moreover, that part of power cannot be separated out by tire forces and moments–based experimental methods. The researchers and engineers have mistakenly ignored this point for a long time. The finding was demonstrated by a comparative analysis of a rigid, pure elastic, and viscoelastic rolling body. This research mathematically proved that rolling loss into heat is not resolvable in terms of tire forces and moments with their associated velocities. The finite element model of a free-rolling tire was further exercised to justify the concept. These findings prompt revisiting rolling resistance in a new way from the energy perspective. Moreover, an extended definition of rolling resistance is proposed and backward compatible with its traditional definition as a resistive force.
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来源期刊
Tire Science and Technology
Tire Science and Technology ENGINEERING, MECHANICAL-
CiteScore
2.10
自引率
0.00%
发文量
11
期刊介绍: Tire Science and Technology is the world"s leading technical journal dedicated to tires. The Editor publishes original contributions that address the development and application of experimental, analytical, or computational science in which the tire figures prominently. Review papers may also be published. The journal aims to assure its readers authoritative, critically reviewed articles and the authors accessibility of their work in the permanent literature. The journal is published quarterly by the Tire Society, Inc., an Ohio not-for-profit corporation whose objective is to increase and disseminate knowledge of the science and technology of tires.
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