Simulation analysis on dynamic response of blast resistant chamber under internal blast load
Blast resistant chamber is used to store explosive materials such as explosives,fireworks,and firecrack-ers.Revealing the structural dynamic response of blast resistant chambers under internal explosion is of great signif-icance for ensuring the safety of people's lives and property.For this purpose,a numerical model of an actual blast resistant chamber was established by using the ANSYS/LS-DYNA finite element software for nonlinear dynamic analysis by the ALE fluid structure coupling algorithm and the JWL explosive detonation state equation.The re-search results indicate that under the effect of internal explosion,the waveform of the blast wave acting on the sur-face of the blast resistant chamber wall(plate)exhibits a sawtooth shape with multiple peaks,and the blast wave near the connection between the top plate and the middle wall shows a significant energy gathering effect;the peak overpressure and impulse values located at the connection between the walls(plates)are significantly higher,and the failure mode of the blast resistant chamber is oblique shear failure at the edge of the roof.
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