IGA-SPH:将等距分析与平滑粒子流体力学耦合起来,用于气爆与结构的相互作用

IF 8.7 2区 工程技术 Q1 Mathematics
Mohammad Naqib Rahimi, Georgios Moutsanidis
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引用次数: 0

摘要

我们介绍了一种新颖的类沉浸数值框架,它将等距分析与平滑粒子流体力学相结合,用于模拟气爆与结构的相互作用。固体域由拉格朗日点云表示,该点云沉浸在背景欧拉流体域中。平滑粒子流体力学框架用于求解固体点云的运动方程,而背景域上的流体力学方程则采用等距分析法。耦合策略依赖于基于惩罚的体积耦合方案,该方案对两个域之间的速度差进行惩罚,只需对现有代码进行少量修改即可直接实施。所提方法的沉浸性质与体积耦合相结合,无需对流体-结构界面进行显式跟踪,也不会对实体域的运动和拓扑结构造成限制。本文提供了大量数学细节,并根据已有的数值工具和实验研究对所提出的方法进行了验证和确认。结果肯定了该方法的准确性、稳健性以及将两种不同计算技术无缝集成的易用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

IGA-SPH: coupling isogeometric analysis with smoothed particle hydrodynamics for air-blast–structure interaction

IGA-SPH: coupling isogeometric analysis with smoothed particle hydrodynamics for air-blast–structure interaction

We introduce a novel immersed-like numerical framework that combines isogeometric analysis with smoothed particle hydrodynamics for simulating air-blast–structure interaction. The solid domain is represented by a Lagrangian point cloud, which is immersed into a background Eulerian fluid domain. The smoothed particle hydrodynamics framework is employed to solve the equations of motion of the solid point cloud, whereas isogeometric analysis is used for the fluid mechanics equations on the background domain. The coupling strategy relies on a penalty-based volumetric coupling scheme that penalizes the velocity difference between the two domains, and involves a minimal amount of modification to existing codes, resulting in a straightforward implementation. The immersed nature of the proposed approach, combined with volumetric coupling, eliminates the need for explicit tracking of fluid–structure interfaces and imposes no limitations on solid domain motion and topology. Ample mathematical details are provided, and the proposed method is verified and validated against established numerical tools and experimental studies. The results affirm the method’s accuracy, robustness, and ease with which it seamlessly integrates two distinct computational techniques.

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来源期刊
Engineering with Computers
Engineering with Computers 工程技术-工程:机械
CiteScore
16.50
自引率
2.30%
发文量
203
审稿时长
9 months
期刊介绍: Engineering with Computers is an international journal dedicated to simulation-based engineering. It features original papers and comprehensive reviews on technologies supporting simulation-based engineering, along with demonstrations of operational simulation-based engineering systems. The journal covers various technical areas such as adaptive simulation techniques, engineering databases, CAD geometry integration, mesh generation, parallel simulation methods, simulation frameworks, user interface technologies, and visualization techniques. It also encompasses a wide range of application areas where engineering technologies are applied, spanning from automotive industry applications to medical device design.
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