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Theme 2: Multi-Physics and Multi-Functional Simulation Methods.

主题 2：多物理场和多功能模拟方法。

基本信息

批准号：
EP/K014102/1
负责人：
Martin A Passmore
金额：
$ 191.25万
依托单位：
Loughborough University
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2013
资助国家：
英国
起止时间：
2013 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FK014102%2F1
关键词：
Theme Multi Physics Functional Simulation

项目摘要

The multi-physics theme is a programme of linked activities that improve the simulation capability within the Automotive Design and Engineering process. It is intended that the methods will have application across a wide range of functions, dynamics and attributes of the vehicle. For example; the off-road capability, the effects off real world aerodynamics and the modelling of the noise within the passenger compartment. The ability to apply simulation methods from initial concept through to engineering verification allows robust decision making at all stages of the process. This will shorten product development times, improve flexibility and the ability to respond to market pressures, reduce reliance on physical prototypes and reduce costs and improve competitiveness. The simulation capability will therefore be expanded both in breadth and depth and methods for making simulation tools available throughout the design and engineering process will be explored.The multi-physics theme is structured around three common research challenges associated with the modelling of complex phenomena in an Automotive context; Reduced Order Modelling, Coupling, and High Fidelity Modelling. These are pursued through several specific projects that address different aspects of the vehicle. By addressing multiple functions within a single proposal there is considerable added value through both academic cross-fertilisation and in cross-attribute collaboration within JLR. The three main research challenges are:High Fidelity Modelling; here refers generally to the simulation of complex phenomenon, for example, capturing the time dependent flow-field around a vehicle where the simulation must accurately resolve the physical processes. An alternative example is capturing the complex tyre-terrain interaction that occurs in an off road situation.The coupling challenge is associated with connecting multiple simulations in terms of the physics and also the process of timing and communication. The emphasis here is on the physics. In addition, the coupling challenge refers to the connection between large simulations running on an high performance computing system and simpler reduced models that are designed to capture only the most important aspects of the physics, for example between a full computational simulation of the in-cylinder flow and a simple model to predict the engine emissions.A reduced order model can be a reduction of a much larger simulation or system of simulations that can be used, within prescribed limits, to investigate specific aspects of a design or to quickly optimise a design before escalating to higher order. Alternatively a reduced order model might be coupled with a higher order model. For example a high fidelity numerical simulation of the aerodynamics might be coupled with a reduced order vehicle handling model to investigate crosswind characteristics.The work is organised into three packages, the first focuses on fluid dynamic driven aspects of simulation and comprises three projects: Real World Aerodynamics, Surface Contamination and Engine-out Emissions. The first undertakes high fidelity unsteady flow simulations of a dynamic vehicle in a realistic environment, the second modelling of surface contamination using the flow predictions from the first project and the third determines emissions based upon the flow-field in the cylinder prior to combustion. The second package focuses on the simulation of effects of rough terrain, through three projects: the prediction of terra-mechanics excitations and their effect on vehicle dynamics, the transmission to the passenger cabin in the form of noise vibration and harshness and their effect on fatigue failure of critical components. The third package will develop methods of automated model order reduction and will take as it cases work from across the theme, initially relatively simple slow-varying problems and then extending to more complex multi-nodal models.

多物理主题是一个相互关联的活动计划，旨在提高汽车设计和工程过程中的模拟能力。其目的是将这些方法应用于车辆的广泛功能、动力学和属性。例如，越野能力、真实世界空气动力学的影响以及乘客舱内噪音的建模。从最初的概念到工程验证，应用模拟方法的能力允许在过程的所有阶段做出稳健的决策。这将缩短产品开发时间，提高灵活性和应对市场压力的能力，减少对实物原型的依赖，降低成本和提高竞争力。因此，模拟能力将在广度和深度上得到扩展，并将探索使模拟工具在整个设计和工程过程中可用的方法。多物理主题围绕与汽车环境中复杂现象的建模相关的三个常见研究挑战构建：降阶建模、耦合和高保真建模。这些是通过几个具体的项目来实现的，这些项目涉及车辆的不同方面。通过在一个方案中处理多种功能，通过学术交叉培养和捷豹路虎内部的跨属性合作，都有相当大的附加值。三个主要的研究挑战是：高保真建模；这里通常指的是复杂现象的模拟，例如，捕捉车辆周围的依赖于时间的流场，其中模拟必须准确地解析物理过程。另一个例子是捕捉越野情况下发生的复杂轮胎与地形的相互作用。耦合挑战与连接多个物理模拟以及定时和通信过程相关。这里的重点是物理学。此外，耦合挑战指的是在高性能计算系统上运行的大型模拟与更简单的简化模型之间的联系，这些简化模型被设计为仅捕捉物理上最重要的方面，例如，在气缸内流动的完整计算模拟与用于预测发动机排放的简单模型之间。降阶模型可以是更大的模拟或模拟系统的简化，这些模拟或模拟系统可以在规定的限制内用于研究设计的特定方面，或者在升级到更高阶之前快速优化设计。或者，降阶模型可以与高阶模型耦合。例如，空气动力学的高保真数值模拟可以与降阶车辆操纵模型相结合来研究侧风特性。这项工作被组织成三个包，第一个集中在模拟的流体动力学方面，包括三个项目：真实世界空气动力学、表面污染和发动机排放。第一个是对真实环境中的动态车辆进行高保真的非定常流动模拟，第二个是使用第一个项目的流动预测对表面污染进行建模，第三个是基于燃烧前气缸内的流场来确定排放。第二部分主要针对地形起伏的影响进行模拟，包括地面力学激励的预测及其对车辆动力学的影响、噪声、振动和粗糙度对客舱的传递及其对关键部件疲劳失效的影响三个项目。第三个包将开发自动模型降阶的方法，并将从整个主题的案例工作，最初相对简单的缓慢变化的问题，然后扩展到更复杂的多节点模型。