Numerical Simulation Study Of The Dynamic Response Of Wall Materials Under Shock Wave

In recent years, with the rapid development of industry in our country, theprevention and management of industrial production safety has been focused by the nation. Since the widely range of the industrial category that production companies covered, the potential security risks are enormous, and the most common and the most serious consequences of the accident type is explosion.The impact of the explosion is very large, which may cause unexpected loss and casualties. However, the collapse of the building wall after the explosion may be the direct source of the major secondary damage to the plant personnel and equipment facilities. Therefore, according to the production type and plant storage items of fire and explosion hazards. Based on the requirements of fire protection distance in code for fire protection design of buildings and within the scope of the enterprise's economic ability, it is significant to try to increase the antiknock distance as much as possible in the design phase of the plant, and it is a top priority to reduce or even avoid the secondary damage after the accident by enhancing the anti-explosion performance of production enterprises plant.The current study from home and abroad are mostly the analysis of the dynamic response of a single finite element software on a single material building under blast loading, or comparative analysis of the dynamic response of a variety of finite element software on the same material building structure under blast loading. In this paper, the author used the ANSYS/LS-DYNA finite element simulation software to study the dynamic response and failure characteristics of three kinds of building materials in the two explosive scenarios. The relevant researches are as follows:1.By analyzing and observing the dynamic response and failure results of one single wall under blast loading, the laws of stress distribution on three kinds of walls are acquired, and the change of the pressure time historical curve and themain factors that influence the regularity.2.By analyzing and observing the dynamic response and failure results of the workshop under the blast loading, we can obtain three kinds of plant stress distribution in the whole process of explosion, as well as the change law of the time history curve and the pressure change curve. Compare the analysis results with the conclusion of the first article, verify the reliability of the numerical simulation.3.Combine two simulation scenarios and summarize the main factors affecting the destruction of the building structure, as well as analyze the displacement of structure of brittle fracture, which will determine whether the flying broken structures after the explosion would produce secondary damage to personnel and equipment.4.The results of simulation are applied to the antiknock design of production enterprises factory and warehouse. Help enterprises to use lower cost to achieve maximum safety, to minimize the damage and casualties that could be caused by the explosion, at last ensure the safety of industrial production.In this paper, the author carried out the numerical simulation analysis of the three kinds of materials of the building structure under blast loading, obtained the impact of shock wave reflection, diffraction, wall reflection, interaction between particle structure, and other factors such as explosion source distance on the destruction of the building structure of three types of materials, which provide a theoretical basis and reference for the design and research of antiknock industrial production.