| Popis: |
The finite element method (FEM) is opposed to direct testing as approach for the first-stage design of inflatable bodies, to investigate the applicability the method may have in this field. Two FEM tools, LS-DYNA [1] and ABAQUS [2] , are used for the modelling of the Yong Engineers’ Satellite 2 (YES2) and the Inflatable Re-entry Technology (IRT) concepts. The results thus obtained are compared to those reached through a testing campaign. As the inflatable is a new technology for re-entry and as the flexibility of the vehicles interacts with their aerodynamic performance, a new iterative FEM/fluid dynamics (FD) procedure is required. This paper presents this methodology, which is currently being developed and will be object of future work.This tool is studied with a membrane simulator. Finally, as further applications of an FEM tool, LS-DYNA is used to carry out a similarity analysis and to simulate the behaviour of a new method to reduce the effects of a leakage from an inflatable re-entry vehicle: the BREOGAN system, which combines effectiveness, simplicity and low cost. |
Full Text from ScienceDirect