横向激励下液体大幅晃动建模分析
发布时间：2018-10-29 12:23
【摘要】：研究部分充液球形贮箱内的液体在横向推力作用下发生大幅晃动的等效力学模型,建模过程同时考虑平动和转动激励。建立一种新的等效模型,首次提出液体的静平衡表面垂直于等效重力方向的假设,将液体的大幅运动分解为跟随等效重力的整体运动和在此基础上的小幅晃动,该等效模型能够更好地模拟液体大幅晃动情形。将仿真得到的晃动力和力矩与传统等效模型及Flow-3d的结果进行对比,验证了新模型的有效性和准确性。该模型可应用于探月软着陆悬停避障过程等实际工程问题中。
[Abstract]:The equivalent mechanical model of large sloshing of liquid in a partially liquid-filled spherical tank under transverse thrust is studied. The translational and rotational excitations are taken into account in the modeling process. A new equivalent model is established, and the assumption that the static equilibrium surface of liquid is perpendicular to the direction of equivalent gravity is proposed for the first time. The large motion of the liquid is decomposed into the whole motion following the equivalent gravity and the small sloshing on this basis. The equivalent model can better simulate liquid sloshing. The effectiveness and accuracy of the new model are verified by comparing the simulated sloshing force and torque with the traditional equivalent model and the results of Flow-3d. The model can be applied to practical engineering problems such as hovering and obstacle avoidance process of lunar soft landing.
【作者单位】： 清华大学航天航空学院;
【基金】：国家自然科学基金(11172145)
【分类号】：V414
本文编号：2297686
[Abstract]:The equivalent mechanical model of large sloshing of liquid in a partially liquid-filled spherical tank under transverse thrust is studied. The translational and rotational excitations are taken into account in the modeling process. A new equivalent model is established, and the assumption that the static equilibrium surface of liquid is perpendicular to the direction of equivalent gravity is proposed for the first time. The large motion of the liquid is decomposed into the whole motion following the equivalent gravity and the small sloshing on this basis. The equivalent model can better simulate liquid sloshing. The effectiveness and accuracy of the new model are verified by comparing the simulated sloshing force and torque with the traditional equivalent model and the results of Flow-3d. The model can be applied to practical engineering problems such as hovering and obstacle avoidance process of lunar soft landing.
【作者单位】： 清华大学航天航空学院;
【基金】：国家自然科学基金(11172145)
【分类号】：V414
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