侧风对降落伞工作性能有着较大影响。为了研究侧风对降落伞工作过程的影响程度,以C9伞作为研究对象,采用基于拉格朗日描述的有限元网格离散流场和结构场。因此两者材料间的耦合计算可以转化为基于罚函数的接触计算。同时为了减小计算量,采用图形变形方法使计算域始终随伞载系统的运动而运动,而风场速度作为边界条件施加在流场有限元边界网格上,风场边界条件不随流场域的位移而改变。将计算结果与空投试验结果进行对比发现二者基本一致,验证了上述计算方法的可行性,为降落伞的设计提供参考依据。 Crosswind has a greater impact on the performance of the parachute. In order to study the influence of crosswind on the working process of parachutes, the C9 umbrella was used as the research object. The finite element mesh based on Lagrangian was used to disperse the flow field and the structure field. Therefore, the coupling calculation between the two materials can be transformed into the contact calculation based on the penalty function. At the same time, in order to reduce the computational complexity, the deformation field is used to move the computational domain along with the movement of the umbrella-mounted system. The wind speed is applied as the boundary condition on the finite element boundary grid of the flow field. The displacement changes. Comparing the calculated results with the results of airdrop test, we found that the two are basically the same, which verifies the feasibility of the above calculation method and provides reference for the design of parachutes.