ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Multi-level strength analysis approach for hypersonic vehicle
Received date: 2014-11-04
Revised date: 2015-09-25
Online published: 2015-09-30
Supported by
A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
In order to obtain more accurate result of structural stress damage, sub-model method is used to analyze a hypersonic vehicle structure. According to the complexity of the hypersonic vehicle, the procedure of the sub-model method consists of three steps. Firstly, a coarsely meshed model is used for the whole structure to calculate the displacement of the cut-boundary nodes and force distribution. Secondly, a denser mesh is generated for the secondary sub-model and multi-bolt joints are simulated by Fastener which could help to obtain more accurate structural stress and bolt loads distribution. Thirdly, the three-level sub-model is built at the maximum bolt load area. With the subroutine of progressive damage, damage of the laminate is analyzed. With the application of the sub-model method, Fastener and UMAT(user-defined material mechanical behavior), the strength of the hypersonic vehicle structure, from global to local, is analyzed, which proves that the workload could be reduced significantly and the simulation would be more accurate.
Key words： FEM; sub-model method; progressive damage; hypersonic vehicle; structure strength
LIANG Heng , ZENG Jianjiang , YI Liyi , TONG Mingbo . Multi-level strength analysis approach for hypersonic vehicle[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2016 , 37(2) : 588 -596 . DOI: 10.7527/S1000-6893.2015.0262
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