Experimental Study of Liquid Slosh Dynamics in a Partially-Filled Tank
Experimental Study of Liquid Slosh Dynamics in a Partially-Filled Tank
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DOI：
10.1115/1.3059585
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发表时间：
2009-07
影响因子：
2
通讯作者：
G. Yan;S. Rakheja;K. Siddiqui
中科院分区：
文献类型：
--
作者：
G. Yan;S. Rakheja;K. Siddiqui
本文报道了一项实验研究，进行调查晃动力和力矩所造成的流体晃动在一个部分填充的坦克受到横向和纵向激励独立应用。实验是在一个缩比模型清孔和一个横向放置的单孔和多孔挡板的挡板槽上进行的。实验是针对三种不同的填充体积和不同类型的激励：不同振幅和离散频率的连续谐波和单周期正弦激励。采用三轴测力仪测量了不同填充体积和激励条件下，挡板和净膛贮箱结构中流体晃动引起的动态力和力矩。结果表明，所产生的力和力矩包括许多频谱分量，可以与激励，共振，振动和拍频。调制的激励频率与谐振频率也是显而易见的所有填充条件和坦克配置时，这两个是非常接近的。结果还表明，力和力矩的峰值放大发生在共振频率附近。在较高的频率，峰值的力量，但是，显着降低到低于由一个等效的刚性质量的惯性力的值。在给定的激励条件下，晃动力的幅值随着填充体积的减小而增大。还观察到挡板的存在对侧向晃动力和相应的共振频率的影响可以忽略不计。然而，它导致了纵向模式谐振频率的显著增加。在纵向加速度激励下，挡板大大减小了纵向力和俯仰力矩的放大。
This article reports on an experimental study conducted to investigate slosh forces and moments caused by fluid slosh within a partly-filled tank subjected to lateral and longitudinal excitations applied independently. The experiments were performed on a scale model cleanbore and a baffled tank with laterally placed single- and multiple-orifice baffles. The experiments were corcducted for three different fill volumes and different types of excitations: continuous harmonic and single-cycle sinusoidal excitations of different amplitudes and discrete frequencies. The dynamic forces and moments caused by fluid slosh with the baffled and cleanbore tank configurations were measured for different fill volumes and excitations using three-axis dynamometers. It is shown that the resulting forces and moments comprise many spectral components that can be associated with the excitation, resonance, and vibration and beat frequencies. Modulation of excitation frequency with the resonant frequency was also evident for all fill conditions and tank configurations when the two were in close proximity. The results also showed that the peak amplifications of forces and moments occur in the vicinity of the resonant frequency. At higher frequencies, the peak magnitudes of the forces, however, reduced significantly to values lower than the inertial forces developed by an equivalent rigid mass. At a given excitation condition, the slosh force amplitude increased with a decrease in the fill volume. It was also observed that the presence of baffles has negligible effect on the lateral slosh force and the corresponding resonant frequency. However, it caused a significant increase in the longitudinal mode resonant frequency. The baffles greatly reduced the amplifications in longitudinal force and pitch moment under longitudinal acceleration excitations.