Thermomechanical Modeling of Aircraft Tire–Runway Contact for Transient Maneuvers

IF 0.9 Q4 ENGINEERING, MECHANICAL
S. Kahms, Michael Hindemith, M. Wangenheim
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引用次数: 0

Abstract

The aircraft tire is the link between the aircraft and the runway and transmits forces and moments within the contact area. During ground maneuvers, the tire is exposed to a wide range of operating conditions. The tires support the weight of the aircraft, they ensure safe rolling during taxiing, and they transfer the required forces to the runway during takeoff and landing. Temperature development during these maneuvers is of great importance because temperature can affect both material stiffness and friction behavior as well as wear characteristics. Heat is generated inside the tire due to energy dissipation caused by the cyclic loading of the tire during rolling. In addition, heat is generated due to friction in the tire–runway contact. Experimental measurements of the temperature distribution in the entire tire are not yet possible. The tire temperatures can only be determined at selected critical spots. Simulation models can help to obtain a better understanding of the overall tire temperature distribution during transient maneuvers. In this work, the transient thermomechanical processes of a rolling aircraft tire, e.g., directly following the touchdown process or during taxiing, are modeled based on a simple physical tire model. An extended brush model is used to simulate the contact forces. The tire temperature is determined via the transient heat conduction equation in radial and circumferential directions. The mechanical and thermal models are coupled via the coefficient of friction and the sliding velocities in contact. The free model parameters are parameterized using experimental data, and the overall model is validated by measurements on the whole tire. The validated thermomechanical tire model is used for simulations or the analysis of different driving maneuvers to get a better understanding of the temperature development in the aircraft tire.
飞机瞬态机动时轮胎-跑道接触的热力学建模
飞机轮胎是连接飞机和跑道的纽带,在接触区域内传递力和力矩。在地面机动时,轮胎暴露在各种操作条件下。轮胎支撑飞机的重量,确保滑行时的安全滚动,并在起飞和降落时将所需的力转移到跑道上。在这些操作过程中的温度变化是非常重要的,因为温度会影响材料的刚度和摩擦行为以及磨损特性。轮胎在滚动过程中,由于循环加载所产生的能量耗散,在轮胎内部产生热量。此外,热是由于轮胎与跑道接触时的摩擦产生的。对整个轮胎温度分布的实验测量还不可能。轮胎温度只能在选定的关键位置确定。仿真模型可以帮助更好地了解瞬态机动过程中轮胎的整体温度分布。在这项工作中,滚动飞机轮胎的瞬态热力学过程,例如,直接在着陆过程中或在滑行过程中,基于一个简单的物理轮胎模型进行建模。采用扩展的电刷模型来模拟接触力。通过径向和周向瞬态热传导方程确定轮胎温度。力学模型和热模型通过摩擦系数和接触时的滑动速度耦合。利用实验数据对自由模型参数进行了参数化,并通过对整个轮胎的实测对模型进行了验证。利用验证的轮胎热力学模型对不同驾驶工况进行仿真或分析,更好地了解飞机轮胎内部温度的变化规律。
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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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