Damage detection and leakage alert of fiber composite wrapped tankfor high pressure hydrogen storage

摘要

Car manufactures are turning to high pressure hydrogen storage for on-broad power applications. Fiber-composite-wrapped high pressure hydrogen tanks are becoming widely used in onboard vehicle storage applications because of light weight and high strength. It is widely accepted that the worst case of the equipment at operating pressure should be only leakage without the risk of explosion. In order to ensure the safety during the operation course, the damage detection and leakage alert of fiber composite wrapped tank for high pressure hydrogen storage should be investigated. The aim of this paper is to find an effective nondestructive damage detection method for the identification of fatigue cracks on composite wrapped tank. First, a three-dimensional finite-element model is developed as the baseline model. Then fatigue crack in inner aluminum alloy, as the typical damage form, is simulated with the position, length, and direction of the crack as investigation parameters. Two nondestructive damage detection methods are applied to identify whether the damage has occurred based on the natural frequency and mode shapes of the fiber composite wrapped tank. The damage detection capability of each method is studied, and the influence of the vehicle vibration caused by road surface roughness and environment noise on damage detection are discussed. Finally, feasible strategy to alert the leakage of the hydrogen of fiber composite wrapped tanks is suggested.