Research On Propagation Rules Of Blast Shock Wave In Chemical Plant Area

The rapid development of the chemical industry accelerates the growth ofChinese economy, but the explosion caused by chemical production has also becomea focus of attention. Once an accident happened, it would cause serious personalinjury and property damage. Therefore, it is important to study area blast effect ofchemical plant to solve the problems of chemical safety device.In order to solve the chemical plant explosion effect of complex systems, thispaper uses nonlinear dynamic analysis software ANSYS/LS-DYDA to finish thenumerical simulation. And aiming at the response of the explosion loading problem,this paper conducts the following several aspects of the numerical simulation：1. Using ANSYS to establish finite element model, this paper simulates shockwaves propagation process with infinite domain air and no obstacle explosion.Post-processing software LS-PREPOST analyses air pressure change of shockwaves. Then compared with the results of numerical simulation and empiricalformula, it is concluded that the results coincided basically with the calculated results.Finally, we get that the numerical simulation on the explosion simulation has certainfeasibility.2. When infinite domain exists rigid obstacles, air explosion shock wave spreadis simulated. Then obstacle this paper analysis the propagation law of shock wavesthrough compared with the pressure before and after the change，when the shockwave s pass the obstacles.3. Taking a specific chemical plant area as an example, we study the spreadsituation of shock waves in the surrounding area. This article analyzes the equivalentstress distribution of the explosion shock waves around the unit area and impulsechanges before and after the compression device.This paper simulates overpressure and impulse changes surrounding thechemical plant area. Through analysing different simulation data, we get overpressure data and the most serious areas damaged by shock. The researchprovides theoretical basis and reference for the industrial explosive safety protectionof chemical plant.