Flame-retardant, thermal-insulation and sound-absorption material structure for aircraft fuselage bottom

Abstract

A flame-retardant, thermal-insulation and sound-absorption material structure for aircraft fuselage bottom is characterized by comprising an outer casing, foam, an inner casing and aircraft fuselage internal bottom plate sequentially from outside to inside, wherein the outer casing is a polymer composite comprising carbon fibers or glass fibers and a resin adhesive; the foam is open-cell foam, the porosity is 95%-99%, the volume weight is 6 Kg / m<3>-15 Kg / m<3>, the foam comprises melamine as a component, and the thickness is 10-200 mm; the inner casing is carbon fiber reinforced plastic; the foam is arranged in a cavity between the outer casing and the inner casing, valves are arranged at top ends of two sides of the cavity respectively, an interval between the valves is 1-5 m, the valves are connected with a water tank on an airplane and are motor-operated switches, and switch wires are located in a front cabin and a rear cabin of the airplane. The flame-retardant, thermal-insulation and sound-absorption material structure has the benefits as follows: 1, the flame retardancy is improved; 2, thermal insulation and sound absorption are realized; 3, the foam is light, and a flame retardant manner is simple, practical, environment-friendly and economical.

Description

technical field [0001] The invention relates to a material structure at the bottom of an aircraft fuselage, in particular to a flame-retardant, heat-insulating and sound-absorbing material structure at the bottom of an aircraft fuselage. Background technique [0002] The flame retardancy of the bottom structure of the civil aircraft fuselage is directly related to the safety of passengers and the loss of the aircraft in the event of an emergency landing accident, and is an important aspect of the structural design of the civil aircraft fuselage. Maintaining the integrity of the fuselage structure, allowing passengers to enjoy a comfortable space and avoiding the danger of oil spills and fires during forced landing are the three main goals of the flame retardancy and heat insulation and sound absorption design of civil aircraft fuselage structures. [0003] As people pay more and more attention to aviation safety, more and more scholars and scientific research institutions ha...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem that the bottom of the aircraft fuselage is prone to oil leakage and fire due to friction between the bottom of the aircraft fuselage and the ground, and to provide a flame-retardant, heat-insulating and sound-absorbing material structure for the bottom of the aircraft fuselage

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