NUMERICAL STUDY ON APPLICABILITY OF DECOUPLED ANALYSES ON DESIGN OF CYLINDRICAL STEEL EXPLOSION CONTAINMENT VESSELS

【Author】

Guide Deng~*,Zhejiang University,China Ping Xu,Zhejiang University,China Jinyang Zheng,Zhejiang University,China Yongjun Chen,Zhejiang University,China Yongle Hu,Northwest Institute of Nuclear Technology,China Longmao Zhao,Tianyuan University of Technology,China Yuanyuan Ma,Zhejiang University,China

【Abstract】

<正>Explosion containment vessels(ECVs) are used to fully contain the effects of high explosions.In the design of ECVs,a two-step procedure was used,in which the vessels were first treated as a rigid wall and blast loadings by explosions were calculated,then the Ioadings obtained were applied to the vessels and dynamic responses of the vessels were evaluated.However,this flow-structure decoupled analysis method may be too conservative for the design of ECVs for one-time use only. These ECVs may undergo large plastic deformation and the deformation may notably decrease the blast loadings.The applicability of the decoupled analyses on the design of cylindrical steel ECVs was studied by numerical simulation.First,a thick-walled cylindrical steel vessel was made to test the blast Ioadings on its inner wall by explosions of centrally located TNT.Then,a numerical model was set up based on the experimental case and verified by experimental results.Finally,the model was used to investigate effect of deformation of the vessel on the blast Ioadings.The results show that shell deformation mainly affects specific impulse and the peak overpressure is not significantly attenuated.The decoupled analysis method may not be too conservative for the design of multiple-time-used ECVs and the design of one-time-used ECV whose allowable plastic deformation is limited to 17.2%.

【Keywords】

mechanics of explosion;;explosion containment vessels;;blast loadings;;numerical simulation

References

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Total: 10 articles

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