文章摘要
基于振动台实验的液体晃荡激励参数敏感性研究
Excitation parameters sensitivity study on liquid sloshing based on shaker table experiment
投稿时间:2018-09-10  修订日期:2018-10-24
DOI:
中文关键词: 液体晃荡  压力分布  振动台试验  参数敏感性分析
英文关键词: Liquid sloshing  pressure distribution  shaking table experiment  parameters sensitivity analysis
基金项目:国家自然科学基金资助项目(51679079);中央高校基本科研业务费专项资金资助(2018B12814);水利工程仿真与安全国家重点实验室开放基金资助(HESS-1703)
作者单位E-mail
邢建建 河海大学港口海岸与近海工程学院  
薛米安 河海大学港口海岸与近海工程学院 mi-anxue@163.com 
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中文摘要:
      为评估不同参数对晃荡载荷的敏感性,基于振动台模型实验研究了运动幅度、水深尤其是外激励频率对晃荡冲击压力的响应规律。实验中,运动幅度分别为3mm、5mm、7mm,液体深度分别为9mm和20mm,外激励频率的范围为0.5f0 ~2.0f0(f0为固有频率)。通过计算相同实验条件下两组实验数据的相关系数讨论了幅度、水深及频率对实验数据可重复性的影响。研究发现浅水晃荡中最大压力的响应频率略大于理论上的固有频率,而有限水深晃荡中最大压力的响应频率略小于理论上的固有频率。运动幅度仅在共振频率附近对晃荡冲击压力较敏感。压力时程曲线的瞬态阶段主要受外激励频率和固有频率调制,稳态阶段仅受外激励频率及其倍频的影响。
英文摘要:
      In order to evaluate the sensitivity of different parameters to sloshing impact pressure, the response law of the motion amplitude, water depth and especially the external excitation frequency to the sloshing impact pressure are studied,based on the shaking table model experiment. In the experiment, the motion amplitude are in turn 3mm, 5mm, 7mm, the liquid depth are 9mm and 20mm, respectively, and the external forcing frequencies ranges from 0.5f0 to 2.0f0 (f0 is the natural frequency). The effects of amplitude, water depth and forcing frequency on the repeatability of experimental data were discussed by calculating the correlation coefficients of the two experimental data under the same experimental conditions. Findings show that the response frequency of the maximum pressure in shallow water sloshing is slightly larger than the theoretical natural frequency, and the response frequency of the maximum pressure in finite water depth is slightly smaller than the theoretical natural frequency. The motion amplitude is sensitive to sloshing impact pressure only the forcing is near the resonant frequency. The transient phase of the pressure time history curve is mainly modulated by the external forcing frequencies and the natural frequency, and the steady state phase is only affected by the external forcing frequencies and its frequency multiplication.
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