垂直隔板开孔率对液体晃荡影响的试验  

Experimental study on the effect of perforation rate of vertical baffle on liquid sloshing

作　　者：薛米安 彭天成 朱爱蒙 郑金海[1,2] 苑晓丽 XUE Mi’an;PENG Tiancheng;ZHU Aimeng;ZHENG Jinhai;YUAN Xiaoli(Key Laboratory of Coastal Disaster and Protection of Ministry of Education,Hohai University,Nanjing 210098,China;College of Harbour Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China;College of Science,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学海岸灾害及防护教育部重点实验室,江苏南京210098 [2]河海大学港口海岸与近海工程学院,江苏南京210098 [3]河海大学理学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2022年第2期23-30,共8页Journal of Hohai University(Natural Sciences)

基　　金：国家自然科学基金面上项目(52171256);中央高校基本科研业务费专项(B200202055,B210202148)。

摘　　要：为了研究垂直隔板开孔率对液体晃荡特性的影响,采用六自由度运动模拟平台,在外激励频率为0.8~1.2倍无隔板液舱一阶固有频率范围内,对安装不同开孔率垂直隔板的矩形液舱开展了一系列晃荡试验。试验结果表明:不同外激励频率作用下开孔率为0.1的开孔隔板在减小液体最大晃荡波高和部分位置的最大冲击压强等方面优于无孔隔板;开孔隔板抑制液舱晃荡的效果随着开孔率的减小而增强;外激励频率为固有频率时,晃荡波的主要频率成分为外激励频率;外激励频率偏离固有频率时,晃荡波的主要频率除了外激励频率外还存在其倍频,且倍频成分随开孔率的增大而逐渐消失。To study the effect of perforation rate of vertical baffle on the liquid sloshing characteristics,a six-degree-of-freedom motion simulation platform was used to conduct a series of sloshing lests in a rectangular tank with the bafles of different perforation rate.The external excitation frequency values are 0.8~1.2 time the first-order natural frequency of the tank.The results show that the perforated baffle with a porosity of 0.1 is better than an unperforated bafle in reducing the maximum sloshing wave height and the maximum impact pressure at some places under different external excitation frequencies.The damping effect on sloshing of the perforated baffle increases with the decrease of the perforation rate.When the external excitation frequeney is the natural frequeney,the main frequency component of the sloshing wave height is the same as the external excitation frequency.When the external excitation frequency is not the natural frequency,the main frequeney of the sloshing wave height also has a frequency multiplication,and the frequency multiplication gradually disappears with the increase of the perforation rate.

关 键 词：液体晃荡 垂直隔板 开孔隔板 开孔率 最大晃荡波高 冲击压强 

分 类 号：TV139.25[水利工程—水力学及河流动力学] U661.71[交通运输工程—船舶及航道工程]