基于有限元网格重构的降落伞工作过程数值研究

Numerical Simulation of Parachute Working Process Based on Finite Element Mesh Reconstruction

以经典的C9圆伞为研究对象,用有限元模型描述该伞结构,定义其周围有限空间作为流场计算域,将全局坐标下载荷位移定义为流场域位移,实现有限流场域的运动。采用运动空间域代替固定的欧式空间域,并与降落伞结构实现了流固耦合计算。得到了丰富的流场、结构场信息及伞载系统的动力学响应曲线。将计算结果与试验数据进行比对发现二者基本一致,验证了此计算方法的可行性,为降落伞的设计提供参考依据。

The typical C9 parachute was taken as the research object,the structure of parachute was described by a finite element model,the finite space around it was defined as the flow field calculation domain,the displacement of the payload in global coordinates was defined as the displacement of flow field. Therefore the motion of the finite field was realized. The movable space was used instead of the fixed Euler space and the fluid structure interaction was calculated with the parachute structure. The information of the flow field and structure field and the dynamic response curves were obtained. The calculation results and the test results were compared and found that both were basically consistent,the feasibility of the calculation method was verified in this paper and this method also provided a reference of design of parachute.