Investigation on the dynamic response of the concrete wall with proof coating under hydrogen explosion loading

The hydrogen resource is regarded as the most promising clean energy source in the future, which has a disadvantage of extremely explosive characteristics while mixture with air. In order to protect the surroundings of the hydrogen station or other hydrogen source in the future, the impact mechanism on the surroundings with the explosion proof coating or not was compared and analyzed. Four walls at different distances from the hydrogen charge center and different scenarios with the explosion proof coating on front of the walls or not were implemented by using the numerical calculation software ANSYS/LS-DYNA in this paper. The dynamic compressive and tensile failure was set in the models to simulate the fractures generated by the impact of the blast strain waves. Results show that a huge broken zone at 200 cm and a small broken zone at 400 cm on back of the walls with no explosion proof coating and only a small broken zone at 200 cm with explosion proof coating on front of the walls finally. The positive peak of the dynamic strain waves at distance of 200 cm is 12x104 ue and larger than all of others. The positive peak of the dynamic strain is larger than the negative peak of that on front of the walls, while the negative peak of the dynamic strain is larger than the positive peak of that on back of the walls which showed an opposite result. The peak particle velocity on back of the walls with explosion proof coating is larger than all others except for the point on front of the center wall at 200 cm with explosion proof coating. It indicated that the explosion proof coating provides a good protective effect on the surrounds.