Numerical Simulation Research Of Explosion Containment Vessels Based On FEM-SPH Adaptive Coupling Algorithm

Explosion Containment Vessels(ECVs)effectively protect the equipment and personnel by limit the detonation waves.ECVs are easy to move and have been applied widely.Many scholars have done a lot of experiments on the ECVs,but the cost is expensive,and there are many difficulties in the process of experiments,only very little data can be measured and the accuracy of the data is not very good.It is difficult to obtain analytical solutions due to the detonation process which involving the interaction between the detonation waves and the structure is complicated.Therefore,it is very important to study the detonation process and the dynamic response of the container by numerical simulation,and this is very important for us to get a more appropriate structural.For the detonation process and the dynamic response of the container,although numerical methods have been applied to simulate these problems,but these methods are still flawed:the numerical methods based on Eulerian grid are often difficult to track the material interface,free surface and motion interface,and it is difficult to give the time history of material;The finite element method is based on the Lagrangian grid,the elements will twist and distort when simulate detonation process and the dynamic response of the container;Many meshless methods need a lot of time to search,so the efficiency of these methods are not good.FEM-SPH adaptive coupling algorithm can overcome the problem caused by large deformation of the material by converting the FEM elements into SPH particles,improving the efficiency of simulation at the same time.FEM-SPH adaptive coupling algorithm can easily describe the material interface,free surface and motion interface,so it can directly describe the detonation process.In this paper,the current state of ECVs and the current state of FEM-SPH adaptive coupling algorithm are reviewed.The dynamic response of the container with prefabricated hole under the explosive loading is simulated by the three-dimensional FEM-SPH adaptive coupling algorithm.The results are compared with the experimental results and simulation results obtained by the ALE algorithm in LS-DYNA software.The validity of the FEM-SPH adaptive coupling algorithm to simulate the detonation process and the dynamic response of the container is analyzed;the effects of the shape of the explosive and the location of the ignition to the detonation process and the dynamic response of the container are studied;the dynamic response of ECVs of metal/ceramic structure and metal/polymer structure under the explosive loading are studied;The dynamic response process of the Explosion Containment Vessel with water medium is simulated,the air tightness and local stress concentration of the container including the hole and the lid are analyzed.To a certain extent,the research results of this paper have the guiding significance for the simulation of the detonation process and the dynamic response of the ECVs,which is helpful to the design of the ECVs.