Wiring method for fibers for monitoring composite cylinder

Abstract

The invention relates to a wiring method for fibers for monitoring a composite cylinder. The method comprises the steps as follows: (1) clamping a cylinder liner on a main shaft of a numerically controlled winding machine; (2) arranging the fibers on the surface of the cylinder liner; (3) forming in a winding way and solidifying a composite layer of the cylinder; and (4) performing a water pressure self-tightening test. According to the structural characteristics of the columnar composite cylinder, a winding geometric planning programming method of a geodesic line or a non-geodesic line of the composite cylinder is simulated, a geodesic line or a non-geodesic line fiber wiring method with the wiring direction changed gradually is adopted firstly, gradual change track wiring of the fibers for measuring stress, strain and temperature in any angle and direction is implemented, the fiber damage failure resulting from the relatively large stress difference between a winding layer fiber and a fiber is avoided in the winding forming process of the cylinder, the solidifying process of the cylinder and the water pressure test process after an optical fiber sensor is implanted, and the survival rate of the fibers implanting in a cylinder layer is greatly increased.

Description

technical field [0001] The invention relates to a wiring method for monitoring optical fibers of composite material gas cylinders, and belongs to the technical field of composite material molding technology. Background technique [0002] For the service environment requirements of composite pressure vessels used in aerospace vehicle engine systems: weight, helium leak rate, pressure, reusable times, volume, displacement, inner cavity cleanliness, assembly accuracy, etc., it is necessary to use helium leak detection technology, acoustic Launching technology, high-precision deformation measurement technology, optical fiber health monitoring technology, etc., establish a set of performance evaluation methods for ultra-thin metal lining lightweight composite pressure vessels that meet the requirements of the aerospace vehicle service environment, and provide ultra-thin metal lining lightweight The engineering application of composite material pressure vessels provides relevant s...

AI Technical Summary

Problems solved by technology

[0004] At present, many domestic units have carried out relevant research work in the field of optical fiber health monitoring. However, the health monitoring technology of fiber optic sensors for composite gas cylinders is still in the experimental stage. The failure of fiber gratings in the monitoring process is serious, and the survival rate of optical fibers is relatively low. Low, nearly half of the optical fiber fails during the manufacturing process, which affects the coverage of test monitoring. Therefore, the optimization of optical fiber sensor layout, performance monitoring and evaluation, etc. need further in-depth research

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