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液体推进剂的晃动特性对大型液体运载火箭以及战略弹道导弹的飞行动力稳定性有着很大的影响。为了使战略弹道导弹和航天运载器具有良好的飞行稳定性，就必须提高其内部液体推进剂的晃动阻尼，抑制液体的晃动，从而达到动力稳定的设计要求。常用的增加液体晃动阻尼的措施是在推进剂贮箱内安装防晃板。纵向竖条防晃板是一种常用的防晃挡板。该文通过对液体晃动时液体与纵向竖条防晃板之间的液动力所做的虚功与局部阻力所耗散的能量的计算，求出液体晃动参数的改变量，分析了纵向竖条防晃板的防晃特性，得到了一些有益的结论。
The sloshing characteristics of liquid propellants have a great influence on the flight dynamics stability of large liquid-propellant vehicles and strategic ballistic missiles. In order to make the strategic ballistic missiles and space vehicles have good flight stability, it is necessary to increase the internal liquid propellant sway damping, inhibiting liquid sloshing, so as to achieve the dynamic stability of the design requirements. Commonly used measures to increase the liquid sloshing damping are to install the anti-shake plate in the propellant tank. Longitudinal vertical bar anti-shake board is a commonly used anti-baffle. In this paper, we calculate the amount of energy dissipated by the virtual work force and local resistance of the liquid dynamic force between the liquid and the vertical stabilizer bar when the liquid is shaking, Shake anti-shake plate characteristics, got some useful conclusions.