Octahedral unit truss tension skin structure

Abstract

The invention provides an octahedral unit truss tension skin structure which is composed of an octahedral unit variable geometry truss and a hyperelastic film tension skin, wherein the octahedral unit variable geometry truss is composed of one or more octahedral basic units, each octahedral basic unit is composed of twelve equal-length truss rods and six spherical joints, and two adjacent octahedral basic units share one surface; and the octahedral unit variable geometry truss is wrapped and tensioned by the hyperelastic film skin, pressure is transferred to the spherical joints by the hyperelastic film skin, and then the pressure is transferred to the truss rods by the spherical joints, so that the truss rods bear axial pressure all the time without axial tension. The octahedral unit truss tension skin structure provided by the invention has the advantages of simple structure of the joints, easiness in design, small size of the joints and definite pressure transferring path; the octahedral truss is wrapped by the hyperelastic film skin, so that the adverse effects of the environment on the octahedral truss are reduced; and the octahedral unit truss tension skin structure can be applied to variable geometry truss structures in the field of aerospace, building, bridge engineering and the like.

Description

technical field [0001] The invention relates to the technical field of new material structures, in particular to an octahedron unit truss tension skin structure applicable to the fields of aerospace, construction, bridge engineering and the like. [0002] Background technique [0003] The variable geometry truss is a relatively new form of aerospace structure, which can be used for the load-bearing structure of the spacecraft control arm or the space crane arm. Compared with the traditional mechanical arm, the variable geometry truss extension arm has the advantages of flexible movement, small mass, high rigidity and high storage rate. [0004] The regular polyhedron is the basic unit of the variable geometry truss, and the regular octahedron is the most commonly used unit form of the variable geometry truss, because the space truss unit composed of the regular octahedron is a just statically definite system with no internal mechanism number and no hyperstatic definite numb...

AI Technical Summary

Problems solved by technology

[0006] The invention discloses an octahedral unit truss tension skin structure, which solves the problems of complex node structure and large node size of the octahedral unit variable geometry truss, and further reduces the self-weight of the truss

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