Generation of SWIFT Models Virtually Using FE Analysis: Application to Cleat Simulations

IF 0.9 Q4 ENGINEERING, MECHANICAL
Yaswanth Siramdasu, Gibin Gil
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引用次数: 0

Abstract

ABSTRACT Parameterization methods for two “commercial tire models—short wavelength intermediate frequency tire (SWIFT) model and flexible ring tire model—are developed around existing testing protocols. As an example, cleat tests are used for estimating belt mass and stiffness and enveloping tests are used for estimating belt bending and contact stiffness parameters in the respective tire models. This is the only way when commercial tire models are parameterized and used mainly by vehicle original equipment manufacturer companies. At present, tire suppliers are stepping up to supply commercial tire models as a part of virtual tire submissions and are virtually simulating standard testing protocols. It is envisioned that with a proper fundamental understanding of commercial tire model parameters and their modeling approaches to capture the respective tire dynamics, we can develop simple finite element (FE) techniques to estimate respective tire model parameters, thereby avoiding the simulation of cleat and other dynamic tests by using FE. With that motivation, previous work has already shown the estimation of belt mass and bending properties from FE part separation technique. In this work, with a fundamental understanding that the front cam and rear cam models in SWIFT are mathematically modeling the curvature of a loaded tire just outside of the footprint, we show that by fitting the tandem model to the loaded FE model deformed co-ordinates length, height, order of cam, and distance between the cams can be estimated easily. This simple loaded FE model-fitting technique is combined with other computationally simple FE static stiffness, footprint, and modal analyses to estimate other SWIFT parameters. Finally, SWIFT models from the above-mentioned FE techniques are developed for several tire designs and validated against enveloping and dynamic in-plane cleat test data. The variations in enveloping and other ride metrics from simulations are inline with testing data.
使用有限元分析生成SWIFT模型:应用于清理模拟
围绕现有的测试协议,开发了两种商用轮胎模型的参数化方法——短波中频轮胎(SWIFT)模型和柔性环形轮胎模型。作为实例,在各自的轮胎模型中,使用清晰试验估算皮带质量和刚度,使用包络试验估算皮带弯曲和接触刚度参数。这是唯一的方法,当商业轮胎模型是参数化的,主要是由车辆原始设备制造商公司使用。目前,轮胎供应商正在加紧提供商业轮胎模型,作为虚拟轮胎提交的一部分,并正在虚拟模拟标准测试协议。设想通过对商用轮胎模型参数及其建模方法的适当基本理解,我们可以开发简单的有限元(FE)技术来估计各自的轮胎模型参数,从而避免使用有限元模拟cleat和其他动态试验。有了这个动机,以前的工作已经显示了估计皮带质量和弯曲性能从有限元零件分离技术。在这项工作中,有了一个基本的理解,即SWIFT中的前凸轮和后凸轮模型是在数学上模拟加载轮胎在足迹外的曲率,我们表明,通过将串联模型拟合到加载有限元模型中,可以很容易地估计变形坐标的长度、高度、凸轮的顺序和凸轮之间的距离。这种简单的加载有限元模型拟合技术与其他计算简单的有限元静刚度、足迹和模态分析相结合,以估计其他SWIFT参数。最后,基于上述有限元技术建立了几种轮胎设计的SWIFT模型,并根据包络和动态平面内清晰测试数据进行了验证。模拟中包络度和其他驾驶参数的变化与测试数据一致。
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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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