Numerical study on load and deformation characteristics of vehicle during high-speed water entry

IF 3.6 2区工程技术 Q1 ENGINEERING, MECHANICAL

Journal of Fluids and Structures Pub Date : 2026-02-01 Epub Date: 2025-12-03 DOI:10.1016/j.jfluidstructs.2025.104473

Yao Shi , Zhenpeng Liu , Hairui Zhao , Guang Pan , Denghui Qin

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引用次数: 0

Abstract

In this study, a numerical model for high-speed water entry of vehicle was established based on the structured arbitrary Lagrangian-Eulerian (S-ALE) method. The model showed good predictive accuracy when compared with experimental results. Using this validated model, numerical simulations were conducted for varying entry velocities (100∼300 m/s) and angles (60° and 90°). Time-domain characteristics including acceleration, pressure, and stress during water entry are systematically obtained, with frequency-domain characteristics further revealed through power spectral analysis. Additionally, the load and deformation characteristics of vehicle’s head are thoroughly investigated. Correlation coefficient calculations indicated that the pressure and stress curves exhibited a consistent trend with the deflection curve, revealing a significant coupling relationship between structural deformation and load characteristics during high-speed water entry.

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车辆高速入水载荷与变形特性数值研究

本文基于结构化任意拉格朗日-欧拉（S-ALE）方法，建立了车辆高速入水的数值模型。通过与实验结果的比较，表明该模型具有较好的预测精度。利用该验证模型，对不同的进入速度（100 ~ 300 m/s）和角度（60°和90°）进行了数值模拟。系统地获得了入水过程中的加速度、压力和应力等时域特征，并通过功率谱分析进一步揭示了频域特征。此外，还深入研究了车辆头部的载荷和变形特性。相关系数计算表明，压力和应力曲线与挠度曲线呈现一致的趋势，表明高速入水过程中结构变形与荷载特性之间存在显著的耦合关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Fluids and Structures 工程技术-工程：机械

CiteScore

6.90

自引率

8.30%

发文量

173

审稿时长

65 days

期刊介绍： The Journal of Fluids and Structures serves as a focal point and a forum for the exchange of ideas, for the many kinds of specialists and practitioners concerned with fluid–structure interactions and the dynamics of systems related thereto, in any field. One of its aims is to foster the cross–fertilization of ideas, methods and techniques in the various disciplines involved. The journal publishes papers that present original and significant contributions on all aspects of the mechanical interactions between fluids and solids, regardless of scale.