摘要
在振动台上试验研究了矩形液舱在宽频带Bretschneider谱与窄频带JONSWAP谱分别激励下的随机晃荡自由液面波特性及其对液舱内壁的冲击压力分布规律,并详细讨论了两种海浪谱作用下自由液面高程最大值及动态压力最大值随谱峰周期和有效波高的变化关系.研究发现相同有效波高、谱峰周期条件下,Bretschneider谱激励下的液体晃荡比JONSWAP谱激励下的液体晃荡更为剧烈.自由液面高程频域分析表明两种海浪谱作用下的自由液面波形状主要受液舱最低固有频率调制,晃荡波能量主要集中在液舱最低固有频率上,且液舱内各测点处的最大动态压力从液舱底部到自由液面处依次增大.
The free surface wave and its dynamic impact pressure on the tank wall of liquid sloshing in a rectangular tank excited respectively by broad band Bretschneider spectrum and narrow band JONSWAP spectrum are studied experimentally on a shaking table.The relations between the maximum free surface elevation and dynamic pressure of liquid sloshing in a rectangular tank and significant wave height and peak period of sea wave spectrum are discussed in detail.Sloshing in a rectangular tank excited by Bretschneider spectrum is found to be more violent than that excited by JONSWAP spectrum under the same condition of significant wave height and peak period.The frequency domain analysis of free surface elevation shows that free surface profiles are mainly modulated by the lowest natural frequency of liquid-tank.Meanwhile,sloshing wave energy is also mainly distributed around the lowest natural frequency.The maximum dynamic pressure is found to be increased with increasing measuring height of pressure sensor from bottom of tank to free surface.
作者
薛米安
陈奕超
苑晓丽
邢建建
XUE Milan;CHEN Yichao;YUAN Xiaoli;XING Jianjian(Key Laboratory of Coastal Disaster and Defence（Hohai University）,Ministry of Education,Nanjing 210098,China;College of Harbour Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China;College of Science,Hohai University,Nanjing 210098,China)
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
2018年第3期261-268,共8页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目(51679079
51209080
11402072)
中央高校基本科研业务费专项资金资助项目(2014B17314
2015B03814)
天津大学水利工程仿真与安全国家重点实验室开放基金资助项目(HESS-1703)
