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首页> 外文期刊>Acta astronautica >Equivalent mechanical model for liquid sloshing during draining
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Equivalent mechanical model for liquid sloshing during draining

机译：排水过程中液体晃荡的等效力学模型

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摘要

For a spacecraft draining liquid fuel during a continuous thruster maneuver, a brief equivalent method is proposed to model the time-varying properties of liquid sloshing for dynamics and control design. The sloshing liquid during draining is equivalent to a set of mechanical model with variable parameters. The model parameters for sample filling ratios are determined by an efficient finite element method according to equivalent principles, while the parameters for other filling ratios are obtained by piecewise linear interpolation. Using the proposed model, forces and torques acted on a Cassini shaped tank by the inside liquid during draining are investigated undergoing several typical motions. Verifications and comparative studies are done with Computational Fluid Dynamics simulations, which confirm the accuracy of the brief model while the sloshing amplitude is small and the flow rate is low.
机译：对于在连续推进器操纵过程中排放液体燃料的航天器，提出了一种简短的等效方法来对液体晃荡的时变特性进行建模，以进行动力学和控制设计。排水期间的晃动液体等效于一组具有可变参数的机械模型。样品填充率的模型参数根据等效原理通过有效的有限元方法确定，而其他填充率的参数通过分段线性插值获得。使用提出的模型，研究了排水过程中内部液体对卡西尼形储罐的作用力和扭矩，并进行了几种典型运动。验证和比较研究是通过计算流体动力学仿真完成的，该仿真证实了简短模型的准确性，同时晃动幅度小且流速低。

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