Multi-physical and multi-scale theorectical-numerical modeling of the tire-pavement-interaction

轮胎-路面相互作用的多物理和多尺度理论数值建模

• 批准号: 257805726
• 负责人: Professor Dr.-Ing. Michael Kaliske
• 金额: --
• 依托单位: Institut für Statik und Dynamik der Tragwerke
• 依托单位国家: 德国
• 项目类别: Research Units
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/257805726?language=en
• 关键词: Multi; physical; multi; scale; theorectical

The design of durable pavement constructions for future traffic loads requires on the one hand a deep understanding of the highly dynamic processes inside the substructures of the vehicle, the tire and the pavement as well as of the corresponding interactions occurring during the overrun and on the other hand the prediction of the resulting long-term consequences on the pavement. Further, the vehicle-tire-pavement-system incorporates a lot of input values, e.g. material properties, climatic influences, loading and driving conditions of the vehicles, which are not known exactly a priori but are influencing the coupled system essentially. Thus, a non-deterministic (uncertain) modelling of the coupled system is required in order to derive the relevant influencing factors for pavement damage. The complexity of this goal can only be captured appropriately in the framework of the research group. A numerically efficient continuum mechanical macroscopic and thermo-mechanical finite element (FE) formulation of the coupled tire-pavement interaction model for single short-term overruns based on a stationary Arbitrary Lagrangian Eulerian (ALE) formulation as well as a multiscale model of rubber friction on rough pavement surfaces were developed in the first project period of this subproject. Besides the further development of these submodels, one main goal of this subproject in the present project period is the numerically efficient treatment and prediction of the long-term structural behavior of pavements (rutting) by means of a temporal multiscale analysis. The model has to capture the multiple repeated mechanical short-time impacts on the pavement as well as the climatic effects in terms of time dependent varying temperature fields due to day-night alternation as well as the seasons during one year. Such a complex temporal multiscale analysis is new to the knowledge of the applicant. Therefore, the long-term characteristics of the examined asphalts as well as of the layer bond have to be captured by continuum mechanical models, which are developed based on experimental investigations in subproject 4 and numerical computations of the microscale asphalt model in subproject 2. One further main goal is the development of a profound understanding of the sensitivity and uncertainty of the pavement behavior with respect to the uncertain input values as well as the identification of the values that influence the durability of pavements most as base for targeted optimizations. Therefore, a pavement model accounting for uncertainties has to be developed. Essential and new is capturing the spatial dependence of the uncertain results, since the influence of the uncertain input values on the results differs for each point in the pavement structure.

一方面，耐用的路面构造的设计需要深入了解车辆，轮胎和路面的高度动态过程，以及在超支期间发生的相应相互作用，另一方面，对路面产生的长期后果的预测。此外，车辆行驶段系统包含许多输入值，例如材料特性，气候影响，车辆的装载和驾驶条件，这些特性并不是先验的，但基本上正在影响耦合系统。因此，需要对耦合系统进行非确定性（不确定的）建模，以得出路面损害的相关影响因素。该目标的复杂性只能在研究小组的框架中适当捕获。基于单个短期覆盖的耦合轮胎 - 步行互动模型的数值有效的连续性机械宏观和机械有限元（Fe）制定，该模型基于基于固定的Lagrangian Eulerian（ALE）的固定任意欧拉（ALE）配方，以及第一个在该项目中开发的橡胶摩擦模型，该模型是在第一个项目中开发的。除了这些子模型的进一步发展外，在本项目期间，该子项目的一个主要目标是通过时间多尺度分析通过数值有效的治疗和对人行道的长期结构行为的预测。该模型必须捕获对人行道的多个重复机械短期影响以及由于昼夜交替以及一年内季节而导致的依赖时间变化的温度场的气候效应。这种复杂的时间多尺度分析是申请人知识的新事物。因此，经过的机械模型必须捕获所检查沥青的长期特征以及层键的长期特征，这些模型是基于subproject 4中的实验研究以及supproject 2中的显微镜沥青模型的数值计算而开发的。这影响了人行道的耐用性，作为目标优化的基础。因此，必须开发出对不确定性的人行道模型。基本新事物正在捕获不确定结果的空间依赖性，因为不确定输入值对路面结构中每个点的结果的影响。