Response Of Antiknock Structure To Overburden And Temperature Under Gas Cloud Explosion

In the industrial production and daily life, explosion accidents do happen. Among these, flammable gas cloud explosion occurs frequently which has caused huge losses of people and property. On purpose to protect the people and property from losing in the gas cloud explosion, theory has to be put forward which could predict the explosive power and the response of the anti-blast structures accurately. Furthermore, reasonable anti-blast solutions should be raised up in the process of architectural design and equipment Installation.Gas cloud explosive power shall include the damage power of overpressure waves and flame waves. Actually, most researches of gas cloud explosion focus on the damage power of overpressure. In this paper, the damage power of flame waves is taken into consideration.Based on the existing theory, research is carried out in this paper into the response of anti-blast structures in action of overpressure waves and flame waves through numerical simulation:1. Through the numerical simulation of unconfined gas cloud explosion, the temperature variation of each monitoring points is obtained. A function is proposed to fit the temperature variation which is concerned with the distance between the monitoring point and the ignition point.2. Through the numerical simulation of gas cloud explosion in one warehouse with different ignition points, the conclusion is drawn that there is a certain relationship between the explosion power and the ignition position The propagation of explosion waves is confined by the walls and the floors. The explosion has maximum power with an ignition point located in the corner formed by walls and floors than any other condition.3. The simulation is carried out on purpose to research the response of anti-blast structures in different actions:overpressure waves only, flame waves only, joint action of overpressure waves and flame waves. Analysis are conducted through comparing these three simulations from the highest equivalent stress and displacement the anti-blast structures could reach. The maximum stress of anti-blast structures will upgrade by 6% in joint action of overpressure waves and flame waves compared with in action of overpressure waves only. The absolute value of maximum stress’s increment is much greater than the valve of stress the anti-blast structural could reach in the action of flame waves only. It suggests that there is a certain correlation between the effects exerted by the overpressure waves and the flame waves.