膜構造エアロシェルの変形を解析するための多粒子系モデルとその検証

抄録

A three-dimensional particle-based membrane model, which is used to predict the shape of the membrane aeroshell with large deformation due to the aerodynamic force acting on the body, is developed. In this model, the elastic forces consisting of the tensile force, shear force, and bending force are considered as well as the aerodynamic force. Thanks to the particle-based formulation, the present model is less complicated and can be solved with small computation time. To check the validity of the model, various problems on the membrane including the Poisson effect, large deformation, buckling and wrinkling are solved and the results are in a good agreement with the analytical solutions. At last, the present method is applied to the re-entry capsule concept with a flare-type membrane aeroshell. Coupled analyses with the Newtonian flow approximation show that the flare-type membrane aeroshell is deformed to concave shape and some longitudinal wrinkles are generated by the aerodynamic force.