低载液率液体晃荡冲击压力的试验研究

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摘要基于电动运动模拟平台，通过改变幅度、频率研究了低载液率晃荡问题，获得了液舱内壁上的压力分布对外激励频率的响应规律，所研究频率范围包含了一阶共振模态及二阶共振模态。研究分析了晃荡波破碎现象对试验数据可重复性的影响，发现只有在共振频率附近的两组试验数据的决定系数较小并且随着幅度增大而减小。压力-频率响应曲线显示最大压力峰值的响应频率出现在稍大于依据线性波理论计算出的一阶固有频率处。通过不同振幅的对比研究发现振幅仅在共振模态下对晃荡压力幅值有较大影响。此外，瞬态及稳态压力时程曲线的频域特征表明，压力时程曲线中的频率成分主要为外激励频率或因晃荡波非线性相互作用而产生的倍频。

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关键词 ：液体晃荡, 冲击压力, 试验数据可重复性

Abstract：A series of sloshing liquid tests with low filling level were conducted on an electric motion simulation platform by varying the external excitation amplitude and frequency.The pressure response on the tank wall to the external excitation frequency was investigated within the frequency range including the first and second-order resonant modes.The effects of sloshing wave breaking on the repeatability of the experimental data was investigated and analysized.It is found that the determination coefficient of two sets of experimental data is rather small only at near the resonant frequencies and its value decreases with the increase of the external excitation amplitude.The pressure-frequency response curves show that the maximum pressure peak appears at the frequency slightly larger than the first-order natural frequency calculated according to the linear wave theory.Through comparing the cases of different amplitudes,it is shown the excitation amplitude has greater influence on the sloshing pressure amplitude only at the resonant mode.In addition, it can also be found from the fast Fourier transformation of the time series of transient and steady state pressures that the main frequency of the pressure time history consists of the external excitation frequency and its multiple components generated by sloshing wave nonlinear interaction.

Key words： Liquid sloshing impact pressure reproducibility of experimental data

收稿日期: 2018-02-07 出版日期: 2019-07-15

引用本文:

陈奕超1,3，薛米安1,2,3*，苑晓丽4，邢建建1,3，张冠卿1,3,朱瑞虎1,3. 低载液率液体晃荡冲击压力的试验研究[J]. 振动与冲击, 2019, 38(14): 239-245.
XUE Mi′an1,2, CHEN Yichao1,2, YUAN Xiaoli3, XING Jianjian1,2, ZHANG Guanqing1,2, ZHU Ruihu1,2. Experimental study on the impact pressure of sloshing liquid with low filling level. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(14): 239-245.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2019/V38/I14/239

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