Large span low electromagnetic loss planar membrane structure

Abstract

The invention relates to a large span low electromagnetic loss planar membrane structure. The large span low electromagnetic loss planar membrane structure comprises a membrane assembly, the membraneassembly comprises a middle membrane assembly, an edge membrane assembly on the edge part and corner membrane assembly on the corner part, the middle membrane assembly, the edge membrane assembly andthe corner membrane assembly are all correspondingly composed of a membrane material, an edge rod, a corner connecting part and a pressed membrane plate, after the membrane materials on the middle membrane assembly, the edge membrane assembly and the corner membrane assembly are bent by 90 degrees around the edge rods, the membrane materials are compressed and fixed to the grooves in the edge rodsthrough the pressed membrane plates and pressed membrane bolts, the edge rods are connected with the corner connecting parts through bolts, the corner connecting parts of the middle membrane assembly, the edge membrane assembly and the corner membrane assembly are connected through intermediate node flanges or edge node flanges, and support trusses are arranged on the back surfaces of the membrane assemblies. The large span low electromagnetic loss planar membrane structure has the advantages that the large span low electromagnetic loss planar membrane structure can be adapt to the plate form, the proportion area of a steel support skeleton is small, the structure is stable, and the transparency of electromagnetic signals is good.

Description

technical field [0001] The invention belongs to the technical field of architectural membrane structures, in particular to a planar membrane structure, in particular to a large-span and low electromagnetic loss planar membrane structure. Background technique [0002] Membrane structure is a new type of large-span space structure developed in the middle of the 20th century. It is the most representative and promising architectural form in the 21st century. It applies prestress to make the structure have a certain rigidity to withstand various loads. Compared with traditional structures, its design ideas and design steps are very different. Membrane structures have been gradually used in large-span buildings such as sports buildings, shopping malls, exhibition centers, and transportation facilities abroad. [0003] The membrane material used in the membrane structure is about 1 kg per square meter. Due to the light weight and the use of high-strength steel structure materials,...

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Problems solved by technology

[0005] At present, the characteristics of the traditional skeletal membrane structure determine that its structural form is mainly a three-dimensional structure, and in order to increase its stability and wind resistance, its skeletal structure only considers mechanical factors. The projected area of ​​the plane is relatively large, which has a great impact on the effective area of ​​electromagnetic penetration, so that it cannot be directly used for electromagnetic wave transmission. For the membrane structure applied to electromagnetic wave transmission, most of the membrane structures are spatial spherical structures. In order to have good electromagnetic permeability, it is generally a membrane structure in the form of a single-layer steel skeleton, but for a planar structure shaped like a window, when the window is used for the protection of indoor electromagnetic devices to collect electromagnetic signals from the outside, it needs a good The windows that transmit electromagnetic signals, that is, the planar wave-transmitting surface, have not yet seen a planar form of wave-transmitting planar membrane structure through research, and traditional glass windows or windows of other structures cannot meet the electromagnetic wave-transmitting performance. ;Therefore, it is very necessary to provide a planar membrane structure that can adapt to the planar form, has a small area of ​​steel support frame, stable structure, good electromagnetic signal permeability, large span and low electromagnetic loss.

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