| 薛米安,邢建建,陈奕超,罗铆钧.基于振动台实验的液体晃荡激励参数敏感性研究[J].,2019,59(2):162-171 |
| 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 of liquid sloshing based on shaking table experiment |
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| DOI：10.7511/dllgxb201902008 |
| 中文关键词:液体晃荡压力分布振动台实验参数敏感性分析 |
| 英文关键词:liquid sloshingpressure distributionshaking table experimentparameters 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项目(2018B128142019B19314). |
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| 中文摘要: |
| 为评估不同参数对晃荡冲击压力的敏感性，基于振动台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3、5、7 mm，水深分别为9和20 mm，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决定系数讨论了运动幅度、水深及外激励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 the sloshing impact pressure, the response law of the motion amplitude, the water depth and especially the external excitation frequency to the sloshing impact pressure is studied based on the shaking table experiment. In the experiment, the motion amplitude is in turn 3, 5, 7 mm, the water depth is 9 and 20 mm respectively, and the external excitation frequency ranges from 0.5f0 to 2.0f0(f0 is the natural frequency). The effects of motion amplitude, water depth and external excitation frequency on the repeatability of experimental data are discussed by calculating the determination 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 sloshing is slightly smaller than the theoretical natural frequency. The motion amplitude is sensitive to sloshing impact pressure only when the forcing is near the resonant frequency. The transient phase of the pressure-time history curve is mainly modulated by the external excitation frequency and the natural frequency, and the steady state phase is only affected by the external excitation frequency and its frequency multiplication. |
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