Wall Effect of Underwater Explosion Load Based on Wave Motion Theories

• Published in: China ocean engineering Vol. 28; no. 5; pp. 587 - 598
• Main Author: 肖巍 姚熊亮 郭君
• Format: Journal Article
• Language: English
• Published: Heidelberg Chinese Ocean Engineering Society 01.10.2014; College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China
• Subjects: Boundaries; Coastal Sciences; effect; Engineering; experiment; explosion; Fluid- and Aerodynamics; Hulls; Hulls (structures); impedance; Impulses; Marine & Freshwater Sciences; motion; Numerical and Computational Physics; Oceanography; Offshore Engineering; Offshore structures; Shock waves; Simulation; theories; underwater; wall; Wall effects; wave; Wave motion; wall effect; impedance; wave motion theories; experiment; underwater explosion
• ISSN: 0890-5487; 2191-8945
• DOI: 10.1007/s13344-014-0047-y

Owing to the existence of the flow field boundary, the shock wave load near the boundary is different from the freefield shock wave load. In the present paper, the hull plate load subjected to underwater shock wave is investigated based onwave motion theories; in addition, the experimental study of the hull plate load is carried out. According to the theoreticalanalysis of the hull plate pressure, we find that the hull plate pressure oscillates repeatedly and decays rapidly with timepassing, the maximum hull plate pressure is 2/（1＋n） times the maximum free field pressure, where n is the ratio ofimpedance, and the impulse is much smaller than the free field impulse. Compared with the experimental study, thetheoretical results agree well with the experimental data.