机动行为下飞机油箱晃动流固耦合动力学分析

飞机执行机动飞行时整体处于大过载状态，此时的油箱晃动流固耦合问题较为复杂。针对这一问题，以某型飞机整体油箱为研究对象，建立ABAQUS与Star-CCM+联合仿真流固耦合方法，对飞机半滚倒转机动行为下的油箱晃动流固耦合效应进行分析，得到了半滚倒转过程中燃油的形态变化，流体域压力以及油箱部件的应力时程曲线等结果，并探究了油箱充液率变化对流固耦合效应的影响。结果表明：机动过载对油箱部件应力应变的影响大于燃油晃动冲击，除上蒙皮外部件应力均随着充液率增加而增加。

Dynamic analysis of fluid-structure interaction on aircraft fuel tank sloshing during maneuver

When the aircraft performs the maneuver flight, the whole structure is in a large overload condition, and the problem of the fluid-structure interaction of the fuel tank sloshing is complicated. Based on a certain type of aircraft fuel tank, a fluid-structure interaction simulation method is proposed with ABAQUS and Star-CCM+ software. By investigating the fluid-structure interaction effect of the fuel tank sloshing during the Split-S maneuver, the morphological change of fuel, the pressure of the fluid filed and the time-history curves of the stress of tank components are obtained. The influence of the filling rate changes on tank sloshing is analyzed. The results indicate that the influence of the overload on the stress and strain of tank components is greater than that of the liquid sloshing, and the stress of all components increase with the increase of filling rate except the upper skin.