冲压式翼伞滑布控制开伞技术研究

为了研究滑布收口控制对冲压式翼伞开伞动载的影响，文章应用结构化任意拉格朗日-欧拉（StructuredArbitrary Lagrange-Euler,S-ALE）方法对翼伞系统在无滑布收口控制和有滑布收口控制两种情况下进行了开伞过程的流固耦合仿真计算，分析了滑布收口对翼伞开伞过程的影响。结果表明：滑布收口控制可以有效降低冲压式翼伞的充气速度、伞衣应力和开伞动载，开伞动载可以降低33%。但有滑布收口控制时，翼伞的气室饱满程度有所下降，边缘气室饱满程度的下降更明显；由于滑布在开伞过程中对翼伞前后缘伞绳受力的影响有差别，使得某些伞绳出现松弛现象，这会对冲压式翼伞俯仰稳定性有一定影响。通过研究滑布收口控制对冲压式翼伞开伞动载的影响，可以为冲压式翼伞收口技术的设计与应用提供参考。

Research on Slider-reefed Control Technology of Ram-air Parafoil

In order to study the influence of the slider-reefed control on the dynamic load of the parafoil opening, the simulation calculation was carried out for the parafoil opening process in two cases, without slider-reefed control and with slider-reefed control. The simulation calculation uses the structured arbitrary Lagrange-Euler (S-ALE) method. The influence of the slider-reefed control on the parafoil opening process was analyzed. The results show that the slider-reefed control can effectively reduce the inflation rate of the parafoil, the stress of the canopy and the dynamic load of the parafoil. The dynamic load of the parafoil can be reduced by 33%. However, the fullness of cells is decreased, and the decrease of the fullness of the edge cells is more obvious when the slider-reefed control is used; Due to the difference in the influence of the slider on the force of the paracordin the previous and the paracord in the back during the opening process, it causes that some of the paracords to sag, so that the pitching stability of parafoil is affected.By studying the influence of slider reefedcontrol on the dynamic load of theparafoilopening, it can provide a reference for the design and application of parafoil reefedtechnology.