The invention relates to a parachute canopy inflation appearance prediction method. The method comprises the following steps: comprehensively considering various factors such as the fabric air permeability of the parachute, the fabric elasticity of a flexible material and the external flow field action of the canopy in the flying process, obtaining the air permeability speed of the canopy on the basis of the Forchheimer law, and obtaining the internal and external pressure difference of the parachute; establishing a mechanical equilibrium equation of the flexible canopy and the radial reinforcing band in the stable landing stage based on the theory of material mechanics, and acquiring the inflation appearance of the flexible canopy in the stable landing flight process of the parachute through comprehensive solving and calculation by adopting a targeting method and a Runge-Kutta method, so a guidance is provided for further calculation of the aerodynamic performance of the parachute and design of the parachute. Compared with a fluid-solid coupling method, the method is simple and convenient and higher in prediction efficiency when the canopy shape is calculated.

    本发明涉及一种降落伞伞衣充满外形预测方法,综合考虑了降落伞织物透气性、柔性材料的织物弹性、以及飞行过程中伞衣外流场作用等多种因素,在Forchheimer定律的基础上得到伞衣透气速度,并得到降落伞的内外压差,进而基于材料力学理论建立稳降阶段柔性伞衣及径向加强带的力学平衡方程,并采用打靶法和Runge‑Kutta法综合求解计算得到降落伞稳降飞行过程中的柔性伞衣充满外形,从而为进一步降落伞气动性能的计算与降落伞设计提供指导;本方法在计算伞衣外形时相较于流固耦合方法,方法简便、预测效率更高。


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    Title :

    Parachute canopy inflation appearance prediction method


    Additional title:

    一种降落伞伞衣充满外形预测方法


    Contributors:
    ZHANG SIYU (author) / YU LI (author) / SUN ZHIHONG (author) / NIE SHUNCHEN (author) / QIU BOWEN (author)

    Publication date :

    2021-09-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung / B64D Ausrüstung für Flugzeuge , EQUIPMENT FOR FITTING IN OR TO AIRCRAFT