摘要
[目的]为了研究船首典型外飘剖面楔形体高海况入水砰击载荷的时空演变特性,[方法]基于自主研发的入水砰击试验平台,对缩尺比为1∶50、底升角为30°的弹性加筋板楔形体开展系列落体高度的入水砰击试验,对砰击压力时历、压力峰值系数和峰值迁移速度进行分析。同时,基于耦合重叠网格与isoAdvector算法对入水砰击射流场及砰击载荷进行数值模拟研究。[结果]结果表明:砰击压力试验峰值约为Wagner理论值的0.8倍,其无量纲系数试验值随着浸没深度的增加而逐渐降低;压力峰值迁移速度的试验值为理论值的0.7~0.9倍。此外,数值模拟方法能够捕捉到尖锐的两相流界面,且计算结果与试验结果误差在1.35%~9.91%。[结论]研究结果可为相关方法验证提供数据支撑,并对实际船首载荷与结构设计具有一定的实际指导意义。
[Purpose]In order to investigate the spatiotemporal evolution characteristics of slamming loads during the high-sea-state water entry of a bow flare wedge,[Method]a series of free-fall water entry tests of a scaled(1∶50)stiffened-plate wedge with a 30°deadrise angle are conducted using a self-developed test platform.The time histories of slamming pressure,pressure peak coefficients,and peak migration speed are analyzed.Numerical simulations are also performed using a coupled overlapping grid and isoAdvector algorithm to study the slamming-induced jet flow field and slamming loads.[Result]The experimental pressure peaks are approximately 0.8 times the Wagner theoretical values.The pressure coefficients decreased gradually with increasing submersion depth.The experimental peak migration speed ranged from 0.7 to 0.9 times the theoretical value.Furthermore,the numerical method successfully captured sharp two-phase flow interfaces,with computational errors relative to the test results falling within the range of 1.35%to 9.91%.[Conclusion]The findings provide valuable data for validating methodologies and offer practical guidance for bow load assessment and structural design in engineering applications.
作者
周瑞鹏
缪帅
刘水不腐
李辉
韩兵兵
ZHOU Ruipeng;MIAO Shuai;LIU Shuibufu;LI Hui;HAN Bingbing(National Key Laboratory of Mechanics of Materials and Structures,Xi'an 710065,China;Aircraft Strength Research Institute of China,Structural Impact Dynamics Aeronautical Science and Technology Key Laboratory,Xi'an 710065,China;Shaanxi Key Laboratory of Vibration,Impact and Noise in Aircraft,Xi'an 710065,China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150009,China)
出处
《船舶工程》
北大核心
2025年第8期59-69,共11页
Ship Engineering
关键词
船首外飘
楔形体
砰击试验
压力峰值
迁移速度
数值模拟
bow flare
wedge
slamming test
peak pressure
propagation speed
numerical simulation
