Numerical Analysis of Form-finding and Tension Forming of Large Planar Membrane Antenna

doi:10.3901/JME.2020.05.141

Abstract

Abstract: Large planar membrane antenna has attracted more and more attention in the field of aerospace because of its light weight, high deployed-folded ratio and good environmental adaptability. Form-finding analysis of a large planar membrane antenna structure is carried out employing the finite element software ANSYS, and theoretical formulae for calculating curved silhouette of the prestressed membrane are derived respectively for two kinds of tensioning systems. By taking the results of form-finding analysis as the initial configuration, a tension forming analysis model is established in the finite element software ABAQUS, and tension process is simulated taking into account the sliding and frictional contact between edge cables and membrane sleeves. The results show that the stress on the membrane will increase when the friction force is taken into account. Furthermore, the stress on the membrane will become non-uniform. The larger the friction coefficient is, the less uniform stress of the membrane becomes. For the inner and outer cable combined tensioning system, the effective area ratio of the membrane surface is lower than that of the inner cable only tensioning system because of the stress concentration near the connection points of the inner and outer cables.

Key words: membrane antenna, tensile system, effective area, stress uniformity

CLC Number:

V414

XIANG Ping, DING Xiao, WU Minger, CONG Qiang, QIU Hui, LIN Qiuhong. Numerical Analysis of Form-finding and Tension Forming of Large Planar Membrane Antenna[J]. Journal of Mechanical Engineering, 2020, 56(5): 141-149.

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