基于任意拉格朗日欧拉方法的射流破土仿真分析

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (13) : 162-171.

论文

吴尚华，鲁滢，武硕，尹原超，张陶，岳前进

作者信息 +

Simulation analysis of jet soil-breaking based on arbitrary Lagrange-Euler method

WU Shanghua, LU Ying, WU Shuo, YIN Yuanchao, ZHANG Tao, YUE Qianjin

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文章历史 +

摘要

本文基于任意拉格朗日-欧拉（ALE）方法对射流破土过程进行仿真分析。以琼州海峡粘土质砂为研究对象，选用MAT-FHWA-SOIL模型建立土体材料本构。运用LS_DYNA软件建立包括射流源、喷嘴、水域及土体的仿真模型，探究射流破土机理。并讨论射流关键参数对破土效果的影响，对射流压力、喷嘴直径、射流靶距进行单因素研究。研究发现在其他射流参数不变的情况下，射流压力增大1倍，最大冲坑深度也增大1倍；土体的冲蚀体积会随着射流压力的增大而增加，与射流时间近似成线性关系；喷嘴直径从5cm增大到9cm时，最大冲坑深度增幅为43%。在20~60cm之间的射流靶距对清理效果的影响较小。本文研究可为海底电缆抢修的射流破土作业过程提供依据。

Abstract

Based on the arbitrary Lagrangian-Eulerian (ALE) method, the process of water jet soil-breaking was simulated and analyzed. Taking the clayey sand in Qiongzhou Strait as the research object, the MAT-FHWA-SOIL model was selected to establish the constitutive model of soil material. Using LS_ DYNA software established simulation models including jet source, nozzle, water area, and soil to explore the mechanism of water jet soil-breaking.The impact of key jet parameters on the soil breaking effect was discussed. A single factor study on jet pressure, nozzle diameter, and jet target distance was conducted. The results find that when other jet parameters remain unchanged, the jet pressure increases by one time and the maximum depth of the flushing pit also increases by one time; The erosion volume of soil increases with the increase of jet pressure, which is approximately linearly related to jet time; When the nozzle diameter increases from 5cm to 9cm, the maximum depth of the flushing pit increases by 43%. The jet target distance between 20 and 60cm has a small impact on the cleaning effect. This study could provide a basis for the water jet soil-breaking operation process of submarine cable emergency repair.

导出引用

吴尚华，鲁滢，武硕，尹原超，张陶，岳前进. 基于任意拉格朗日欧拉方法的射流破土仿真分析[J]. 振动与冲击, 2024, 43(13): 162-171

WU Shanghua, LU Ying, WU Shuo, YIN Yuanchao, ZHANG Tao, YUE Qianjin. Simulation analysis of jet soil-breaking based on arbitrary Lagrange-Euler method[J]. Journal of Vibration and Shock, 2024, 43(13): 162-171

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