Theoretical Study on Pulsation Characteristics of Bubble near a Rigid Wall

WANG Tianzhao; SUN Yuanxiang; WANG Cheng; CHEN Yanwu

doi:10.12382/bgxb.2025.0098

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Theoretical Study on Pulsation Characteristics of Bubble near a Rigid Wall

更新时间：2026-04-24

- Theoretical Study on Pulsation Characteristics of Bubble near a Rigid Wall
- Acta Armamentarii Vol. 47, Issue 2, Pages: 250098(2026)
- 作者机构：
  
  北京理工大学爆炸科学与安全防护全国重点实验室，北京 100081
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2025.0098
  CLC： O381;O359+.1
- Received：17 February 2025，
  
  Online First：25 December 2025，
  
  Published：28 February 2026
- 稿件说明：
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WANG Tianzhao, SUN Yuanxiang, WANG Cheng, et al. Theoretical Study on Pulsation Characteristics of Bubble near a Rigid Wall[J]. Acta Armamentarii, 2026, 47(2): 250098.
DOI：

WANG Tianzhao, SUN Yuanxiang, WANG Cheng, et al. Theoretical Study on Pulsation Characteristics of Bubble near a Rigid Wall[J]. Acta Armamentarii, 2026, 47(2): 250098. DOI： 10.12382/bgxb.2025.0098.

摘要

为了探究刚性壁面对水下爆炸气泡脉动特性的影响机制，基于能量守恒原理和“源汇法”建立了壁面附近气泡脉动动力学方程，提出了气泡脉动无量纲周期解析公式，揭示了二次压力波峰值的边界效应规律。理论研究表明，壁面附近气泡脉动周期随距离参数减小而增大，壁面上的二次压力波峰值为自由场同位置的1～2倍。通过深水爆炸实验（200～500 m水深）与LS-DYNA数值模拟，验证了理论模型的准确性。进一步结合壁面附近气泡脉动方程，提出了改进的气泡射流方向判断准则，对于Blake准则失效工况下的气泡射流方向有着较为准确的预测。为水下爆炸气泡与结构相互作用的深入研究提供了理论支撑。

Abstract

The influence mechanism of a rigid wall on the pulsation characteristics of underwater explosion bubbles is investigated. A dynamic equation for the pulsation of bubbles near a wall is established based on the principle of energy conservation and the sink-source image method

and an analytical formula for the dimensionless pulsation periodof bubbles is proposed. The boundary effect law of the secondary pressure wave peak is revealed. Theoretical studies show that the pulsation period of bubbles near the wall increases with the decrease of the distance parameter

and the peak value of the secondary pressure wave on the wall can reach 1~2 times that of the free field at the same position. The accuracy of the theoretical model is verified through deep-water explosion experiment(200~500 m water depth)and LS-DYNA numerical simulation. Furthermore

an improved criterion for judging the bubble jet direction is proposed based on the equation of bubble pulsation near the wall

which can accurately predict the bubble jet direction under the failure condition of Blake criterion. This research provides theoretical support for the in-depth study of the interaction among underwater explosion bubbles and structures.

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references

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