不同海浪谱激励下矩形液舱内液体晃荡试验研究

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薛米安,陈奕超,苑晓丽,邢建建.不同海浪谱激励下矩形液舱内液体晃荡试验研究[J].,2018,58(3):261-268

不同海浪谱激励下矩形液舱内液体晃荡试验研究

Experimental study of liquid sloshing in rectangular tank excited by sea-wave spectrum

DOI：10.7511/dllgxb201803006

中文关键词:宽频带Bretschneider谱窄频带JONSWAP谱液体晃荡矩形液舱试验研究

英文关键词:broad band Bretschneider spectrum narrow band JONSWAP spectrum liquid sloshing rectangular tank experimental study

基金项目:国家自然科学基金资助项目(516790795120908011402072)；中央高校基本科研业务费专项资金资助项目(2014B173142015B03814)；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).

作者	单位
薛米安,陈奕超,苑晓丽,邢建建

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中文摘要:

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．

英文摘要:

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.

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不同海浪谱激励下矩形液舱内液体晃荡试验研究

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