The grid structure is a high-order statically indeterminate structure system. In the analysis of the plate type grid, it is generally assumed that the joint is hinged, and the external load acts on the joint according to the static equivalent principle, which can be calculated according to the space truss displacement method, that is, the hinged rod finite element method. Simplified calculation methods such as cross beam differential analysis, pseudoplate method, etc. can also be used for internal force and displacement calculation. The nodes of the single-layer shell-type grid are generally assumed to be just connected, and should be calculated according to the finite element method of the just-connected rod system; the double-shell shell type grid can be calculated according to the finite element method of the hinged rod system. Single-layer and double-shell grids can also be simplified by the pseudoshell method.

XPS Extruded Polystyrene

The full name of XPS (extruded polystyrene) is Extruded Polystyrene Foam Board.

It is a rigid foam board made of polystyrene resin as raw material plus other raw materials and polymers, heated and mixed while injecting the catalyst, and then extruded and molded. Its scientific name is Xps Extruded Polystyrene Foam Insulation Board (XPS for short). XPS has a perfect closed-cell honeycomb structure. This structure allows XPS boards to have extremely low water absorption (almost no water absorption), low thermal conductivity, high compression resistance, and aging resistance ( There is almost no aging decomposition phenomenon under normal use).

Xps Insulation Sheet,Xps Extruded Polystyrene Foam Insulation Board,Extruded Polystyrene Foam Board,Xps Foam Board Heat Insulation

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