火炸药学报2025，Vol.48Issue(6)：534-545,12.DOI:10.14077/j.issn.1007-7812.202412009
水下爆炸下弹塑性带孔板底部气泡动力学特性
Investigation on Bubble Dynamics Beneath Elastoplastic Plate with a Hole Subjected to Underwater Explosion
摘要
Abstract
To investigate the dynamic response characteristics of ship structures under different load coupling effects after being damaged by shock waves,the underwater explosion tests were performed with a small amount of TNT detonated beneath elas-toplastic plates,both with and without holes.Subsequently,a finite element model was developed based on the Coupled Eule-rian-Lagrangian(CEL)algorithm to simulate the entire underwater explosion process.By integrating experimental data with nu-merical simulations,the bubble dynamics under different boundary conditions and their impact on the plates were analyzed,and the accuracy of the finite element method was verified.The test results indicate that the elastoplastic plate induces an upward water jet from the bubble,whereas the presence of holes leads to generate a downward water jet.The finite element simula-tion results show that the evolution mode of bubbles is significantly affected by the thickness of the elastic-plastic plate.As the plate thickness increases,the bubble is more attracted by the structure and presents four typical forms:upward water jet,counter water jet,downward water jet,and collapse.When the thickness of the steel plate is less than 0.5 cm,the backflow of water above the plate dominates the movement of bubbles,inducing downward water jet;when the thickness of the steel plate is between 0.5-1.0cm,bubbles form a counter water jet under the combined action of water reflux and Bjerknes force;when the thickness of the steel plate is greater than 1.0cm,the bubbles are mainly driven by Bjerknes force,forming a unidirectional upward water jet and further releasing concentrated upward impact energy,thereby inducing secondary damage to the ship structure after the initial explosion impact.关键词
爆炸力学/水下爆炸/水射流/弹塑性板/预制孔洞/气泡动力学Key words
explosion mechanics/underwater explosion/water jet/elastoplastic plate/prefabricated holes/bubble dynamics分类
军事科技引用本文复制引用
姜一鹏,秦健,赖志超,孟祥尧,文彦博,黄瑞源..水下爆炸下弹塑性带孔板底部气泡动力学特性[J].火炸药学报,2025,48(6):534-545,12.基金项目
国家自然科学基金(No.12172178) （No.12172178）
