气体爆炸载荷作用下抗爆容器的动力学响应

首先对抗爆容器内气体爆炸载荷进行了研究分析,利用非线性有限元软件ANSYS和Von Mises屈服准则对抗爆容器在气体爆燃和爆轰两种不同情况下的动力学响应进行了强度分析,得到了抗爆容器特征点的等效应力时间曲线和主要部位的等效应力云图以及壳体变形特征。在爆炸载荷作用下,抗爆容器在容器与接管以及与支撑板连接部位出现较高的峰值等效应力。和爆燃载荷相比,爆轰载荷条件下抗爆容器各部位的峰值等效应力大得多。抗爆容器在爆燃载荷作用下处于弹性变形范围,处于安全状态;在爆轰载荷作用下,容器局部发生塑性变形并进入塑性屈服,但由于材料的应变率强化效应,可以认为该容器整体上还是安全的。

Dynamic Response of Pressure- Shock- Resistant Vessel Subjected to Gas Explosion Load

Gas explosion loading of pressure-shock-resistant vessel was firstly analyzed,then Von Mises yielding criterion was used to make strength analysis of pressure-shock-resistant vessel under different explosion load by using non-linear finite element software ANSYS.Equivalent stress history of specified positions,stress contour of particular parts and deformation characteristics of the vessel were obtained.The results show that high maximum equivalent stress appears near flange and supporting plate,much higher maximum equivalent stress appears when subjected to detonation load than deflagration load,pressure-shock-resistant vessel is safe under deflagration load because it is within elastic deformation,however when subjected to detonation load,pressure-shock-resistant vessel begins to yield plastically because local deformation appears,but the vessel can be considered to be safe because of strain-strengthening effect of metal material.