论文标题

使用有限元方法在地形表面找到最短路径

Finding Shortest Path on a Terrain Surface by Using Finite Element Method

论文作者

Altintas, Gokhan

论文摘要

表面上最短路径问题的解决方案不仅是在数学领域要解决的理论问题,而且还需要在非常不同的领域(例如医学,国防和建筑技术)中解决的问题。在特定土地方面,对于这些问题的解决方案算法在确定开放区域的最短路径方面也非常重要,在开放区域中,道路将通过土木工程领域,或者在各种逻辑需求(尤其是在原始地形中)确定人道或无人驾驶车辆的路线确定。此外,在防御工业中使用的载人和无人接地车辆(UGV),在原始地形中寻找问题也很重要。在本研究的范围内,提出了一种可用于视线范围内的即时路线确定或用于涵盖更广泛区域的路线确定的方法。尽管研究范围内提出的示例是陆基的,但该方法几乎可以应用于类似性质的几乎所有问题类型。研究中使用的方法可以简要地描述为基于机械类似物的结构载荷系统的表面的机械分析。在这种方法中,可以通过遵循通过将点从彼此移开或遵循在机械分析期间将两个点之间形成的线性线移开或遵循线性线来实现的最短路径的确定。如果提出的方法要使用多种刚体动力学方法而不是灵活的身体力学进行,则可以通过确定两个点之间的最短路径或通过跟踪力来轻松而快速地执行。但是,这项研究中提出的方法是通过模拟使用FEM模拟柔性物体的示例来提出的。

The solution of the shortest path problem on a surface is not only a theoretical problem to be solved in the field of mathematics, but also problems that need to be solved in very different fields such as medicine, defense and construction technologies. When it comes to the land specific, solution algorithms for these problems are also of great importance in terms of determination of the shortest path in an open area where the road will pass in the field of civil engineering, or route determination of manned or unmanned vehicles for various logistic needs, especially in raw terrains. In addition, path finding problems in the raw terrains are also important for manned and unmanned ground vehicles (UGV) used in the defense industry. Within the scope of this study, a method that can be used for instant route determinations within sight range or for route determinations covering wider areas is proposed. Although the examples presented within the scope of the study are land-based, the method can be applied to almost all problem types of similar nature. The approach used in the study can be briefly described as the mechanical analysis of a surface transformed into a structural load bearing system based on mechanical analogies. In this approach, the determination of the shortest path connecting two points can be realized by following the stress-strain values that will occur by moving the points away from each other or by following a linear line that will be formed between two points during the mechanical analysis. If the proposed approach is to be carried out with multiple rigid body dynamics approaches instead of flexible bodies mechanics, it can be carried out easily and very quickly by determining the shortest path between two points or by tracking the forces. However, the proposed approach in this study is presented by simulating examples of flexible bodies using FEM.

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